Successful ballistic tests of ceramic armor were carried out in Russia

Ballistic tests of ceramic armor plates have been completed in Russia. According to the press service of Rostec, the Tekhnodinamika holding was engaged in the development of ceramic armor.

The new armor, developed by the Ufa Aggregate Production Association, was sent to the Research Institute of Steel, where comprehensive tests were carried out. First, the armor plates were tested separately by firing from a 7,62 mm Dragunov sniper rifle, then the armor plates were tested already as part of protective equipment (body armor). The institute said that all tests of the armored ceramics were successful.

Armored plates made of corundum ceramics demonstrated high protective properties, comparable to armored steel, at a smaller size and weight. Serial production of products is planned to begin in the near future

- said in a statement.

The description states that corundum ceramic is a superhard material based on aluminum oxide.

The creation of ceramic armor is one of the most promising trends in the development of body armor. It is lighter and smaller in size, but at the same time more dense in structure than armor steel. Corundum ceramic plates are able to protect not only personnel, but also air, land and sea equipment from armor-piercing bullets and shells

- said Igor Nasenkov, General Director of the Technodinamika holding.

Note that at the beginning of 2019, it was reported that more than 5 new-type body armor with ceramic armor entered the motorized rifle units of the combined arms army of the Western Military District. According to the press service of the Western Military District, the new bulletproof vests have ceramic armor panels of the 6th and 10th classes of protection, which withstand a bullet fired from a Dragunov sniper rifle (SVD) from a distance of 7,62 meters, as well as a reinforced bullet for a Kalashnikov assault rifle of caliber XNUMX. XNUMX mm.

Comments

[Trapp1st]

Dragunov (SVD) from a distance of 10 meters

It doesn't sound bad, we are waiting in large numbers in the troops.

[Borik]

From ten meters the armored man withstood, and the ribs on whom this armored man will stand. Yes, from ten meters, the blow will be of such force that it can stop the heart. And so well done, our craftsmen, let's see how the armors on this basis will go to the troops. And how much will they cost.

[Trapp1st]

From ten meters, the armored man withstood and the ribs on whom this armored man will stand.

I'm not an expert, but ceramic armor plates have a peculiarity, they are destroyed extinguishing the energy of a bullet, plus if there is a Kevlar fabric backing, they can withstand. The disadvantage of ceramic armor plates is that they can no longer hold 2 shots.

[vVvAD]

Kevlar will not be there - it is morally outdated, loses its properties when wet. There are domestic development and production of aramid threads and fabrics based on them, which have much better characteristics. For example, RUSAR-S; Ruslan and Artek.

[Shurik70]

If the weight is less, and the efficiency is the same, then with equal weight the efficiency will be higher.
They didn't say anything about the cost, which means that the price is more expensive, and significantly. So the troops will be switching to new armor for a very long time.
It would be necessary to start the free sale. PMC fighters will buy, regardless of the price.

[Maki Avellevich]

Quote: Trapp1st

The disadvantage of ceramic armor plates is that they can no longer hold 2 shots.

would you like to teach the first bullet?

[Trapp1st]

would you like to teach the first bullet?

An interesting question, but ВWould you like to get a second one?

[Maki Avellevich]

Quote: Trapp1st

An interesting question, would you like to get a second one?

I would refuse any.
you can usually get a large number of hits from a short distance, aimed.
in this case, the vest will probably not help you either, since the opponent is a few meters away from you.
at a distance of say 100 meters and above, it is rare for someone to hit you over and over again

[Trapp1st]

I would refuse any.

Mutually.

rarely does someone think over and over again in you

Maybe he can't, I don't want to check either, especially without protection.

[Peter is not the first]

From ten meters the armored man withstood, and the ribs on whom this armored man will stand.

The ribs may not withstand, but 4046 J of the muzzle energy of the SVD is better (at a distance of 10 m, of course, it will be less), distributed by a ceramic plate over an area of ​​several thousand mm2 (I don’t know the size of the plate) than over an area of ​​5,98 mm2 (sectional area of ​​the bullet) ... Better to lie down in a hospital or get off with a large hematoma than in damp earth.

[Romario_Argo]

4046 J of muzzle energy SVD

it's just a blow of 400 kg, a blow with a bat on the crown of 3000 kg.

[Ingenegr]

This is something new - the value of kinetic energy in J is briskly converted into kilograms. I probably overslept the topic somewhere at school)

[Maki Avellevich]

Quote: Romario_Argo

it's just a blow of 400 kg, a blow with a bat on the crown of 3000 kg.

The area of ​​the bit and the point of the bullet are different

[_Ugene_]

and the ribs on whom this armor will withstand

what other options are there? what to do with kinetic energy? here it is at least distributed over a large area

[JonnyT]

Damper ... although this is a matter of the distant future,
Kent in Chechnya in Bronik caught a line, from 200 meters, so they broke all the ribs, then more growths went ...
In general, for me personally, it's incredible that the SVD can withstand from 10 m.
And the Afghan also told how his grandfathers were forced to wear the second Bronik over the first, when they entered the village, and it was not in vain that he caught a bullet, he spoke as if a concrete pole of power transmission was being thrown into his chest from all over.

So the guys are better off in the hospital with broken ribs and a broken organ alive than with a neat hole but dead.

It is better, of course, to combine armor, they say, the first layer is a viscous energy-extinguishing material, then an impenetrable plate and behind it a damper that extinguishes and distributes kinetic energy

[Stas 2rep]

Will it be better without protection?

[Piramidon]

Quote: Borik

and the ribs on whom this armor will stand.

You, man, and in the tank will suck. What's better, broken ribs, massive hematoma, and a 7,62 chance of surviving a bullet, or your howling that this is all crap?

[culinary]

Quote: Trapp1st

Dragunov (SVD) from a distance of 10 meters

It doesn't sound bad, we are waiting in large numbers in the troops.

And what will happen to the guts and ribs of the one on whom the armor is?
Helmets are not made unbreakable for a simple reason, the neck will not stand. But it will lie like a living ... Black humor.
Better than without it anyway.

[Romario_Argo]

And what will happen to the guts and ribs of the one on whom the armor is?

Nothing will happen,
all this was tested in the 70s on assault suits Warrior 70 kg; Warrior-KM weighing 35 kg.
the article does not reveal what kind of ceramics
silicon carbide is closer to corundum - 4 times stronger than steel
boron carbide - 8 times stronger than steel

Helmets are not made unbreakable for a simple reason, the neck will not stand.

do.
armored helmet Vulcan-5 (5 protection class) with a protective shield for the neck just for shock absorption

[culinary]

Quote: Romario_Argo

And what will happen to the guts and ribs of the one on whom the armor is?

Nothing will happen,
all this was tested in the 70s on assault suits Warrior 70 kg; Warrior-KM weighing 35 kg.
the article does not reveal what kind of ceramics
silicon carbide is closer to corundum - 4 times stronger than steel
boron carbide - 8 times stronger than steel

Helmets are not made unbreakable for a simple reason, the neck will not stand.

do.
armored helmet Vulcan-5 (5 protection class) with a protective shield for the neck just for shock absorption

Lagged behind life.

[Trapp1st]

Helmets are not made unbreakable for a simple reason, the neck will not stand.

Helmets are made Helmet of the 2nd class, they withstand the hits of pistol bullets, even 7,62 from some kind of revolver (it's more about the speed of the bullet). But it already weighs about 4,5 kg. To keep the submachine guns, you will have to make a 3rd class helmet, increasing the class will increase the weight several times. This piece of equipment doesn't make much sense, because the fighter simply will not be able to move, and the fighter is much more likely to get a neck injury from wearing such a helmet than from a bullet that he will stop. Broken necks are a myth.

[3-e-09]

Finally! And then I decided to put tiles in the kitchen this year, but there was no suitable, domestic one. Taking bourgeois, fashionable ceramic granite is somehow out of the spirit of the times. But the Ufa ceramics - it will be the most! We are waiting in the stores of the Voentorg!

[APASUS]

Quote: 3rd-09

Finally! And then I decided to put tiles in the kitchen this year, but there was no suitable, domestic one. Taking bourgeois, fashionable ceramic granite is somehow out of the spirit of the times. But the Ufa ceramics - it will be the most! We are waiting in the stores of the Voentorg!

Cover her head so as not to damage the rest of the brain

[3-e-09]

How do you do it? Share your knowledge of how you turned your head into a citadel?

[Kerensky]

Was the conspiracy plate "upside down" secured?

[hohkn]

It's just that the fastener guides are installed. They go like a wedge so that the plate does not fall off when hit.

[Free wind]

And what is written, I was able to read something like FRET or FROT, although I did not understand what it meant. The institute is cool, I am by the simplicity of my soul, I thought that the armor on the dummies would be tested, what stands. And here on the BMP, two clamps were welded, that's the whole institute training ground.

[Brylevsky]

And what is written, I could read something like FRET or FROT,

It says "front". Apparently, the orientation of the sheet matters, otherwise it would be all the same how to put it.

[Free wind]

Well, yes, I saw, on the reverse side, the soft lining is likely., It is clear that the fabric is. It would be interesting to know the thickness.

[Thrifty]

Interestingly, is it based on natural discolored corundum (sapphire), or its artificial analogue? The natural physical and chemical properties are higher, the quality of the plate will also be higher, but in price it will be very expensive. ..

[Professor]

Quote: Thrifty

Interestingly, is it based on natural discolored corundum (sapphire), or its artificial analogue? The natural physical and chemical properties are higher, the quality of the plate will also be higher, but in price it will be very expensive. ..

Natural sapphire is a gem. Expensive and never the size of a bulletproof vest.
Sapphire is an aluminum oxide (chemical formula Al2O3) or just Alumin. Ordinary ceramics. Press or cast, fire and voila, the product is ready. At least a toilet bowl, at least a body armor. The main difference from sapphire is that it is a single crystal, while a toilet bowl is made up of millions of crystals of the same substance.

[Mountain shooter]

It's a pity there is no specifics. How much easier are armor plates? Price doesn't matter when it comes to safety ... Ceramics are certainly good.

[Jack O'Neill]

It's a pity there is no specifics. How much easier are armor plates? Price doesn't matter when it comes to safety ... Ceramics are certainly good.

Price is the main factor! And here it is worth seeing whether these plates will only go to the FSB or will they also go to the army.

[Alex777]

The quantity depends on the price. And you need a lot of good armor.

[Mountain shooter]

Quote: Alex777

The quantity depends on the price. And you need a lot of good armor

And the price depends on the quantity. Line production axiom.

[Undecim]

It's a pity there is no specifics. How much easier are armor plates?
The density of the armor steel is 7850 kg / m3, the density of high-purity aluminum oxide is 3810-3920 kg / m3.
That is, an alumina part will be about half the weight of a steel part of similar dimensions.

[Jack O'Neill]

At first, armor plates were tested separately by shelling from a 7,62 mm Dragunov sniper rifle

Why 7.62x54 and not 7.62x51?

[Mountain shooter]

What is he

Quote: Jack O'Neill

Why 7.62x54 and not 7.62x51?

More armor-piercing? Approximately equal, actually ...

[A. Privalov]

This is something new?
For some reason I remember that such armor has been successfully used somewhere since the mid-60s of the last century.
Maybe this is something specific for body armor?
Usually, the stability characteristics of the material are given for APM2 armor-piercing bullets of the 7,62 × 63 mm cartridge, and from the M61 bullet of the 7,62 × 51 mm cartridge (standard rifle-machine gun ammunition of NATO member countries with an armor-piercing bullet) at distances of about 100 meters (more precisely, 91 m = 100 yards) and with bullets deflected up to 15 degrees from normal. For these conditions, at 9 mm (0,35 in) thickness, the material should be 100% penetration proof.

[Kerensky]

What is the test procedure? If what in the photo was beaten from the SVD from 10 (!) Meters ... Maybe at the same time the accuracy of the SVD battle was tested?

[Jack O'Neill]

Considering that the SVD is a Marksman, 10 meters is normal. This is not a sniper rifle, after all.

[rocket757]

Do what you need to do, do well!
Yes, do it in sufficient quantity, which is very important.

[123456789]

It easier and smaller in size, but at the same time more dense in structure than armor steel.

Which is lighter: a pood of luminium or a pood of steel?

[culinary]

Quote: 123456789

It easier and smaller in size, but at the same time more dense in structure than armor steel.

Which is lighter: a pood of luminium or a pood of steel?

A pood of cotton wool!
Volume difference ...

[Undecim]

The creation of ceramic armor is one of the most promising trends in the development of body armor. It is lighter and smaller, but at the same time more dense in structure, than armor steel - said Igor Nasenkov, CEO of Technodinamika holding
It is immediately clear that the general director of the holding is far from understanding elementary technical issues, because he is an economist by education, that is, a manager.
The density of the armor steel is 7850 kg / m3, the density of high-purity aluminum oxide is 3810-3920 kg / m3.
Ceramic armor does not have a higher density, but rather stiffness - the material's ability to resist deformation.
Armor steel has a Young's modulus of 210 gigapascals, and aluminum oxide has 350 - 390 gigapascals.
Ceramic armor began to be widely used around 1965.

[Professor]

Quote: Undecim

Ceramic armor does not have a higher density, but rather stiffness - the material's ability to resist deformation.
Armor steel has a Young's modulus of 210 gigapascals, and aluminum oxide has 350 - 390 gigapascals.
Ceramic armor began to be widely used around 1965.

Actually, Young's module is also a module Elasticity... And here it is correct to talk about hardness ... Brinell, Rockwell or Vickers, if you like. Armor steel and ceramics are measured in different ways, but in principle, hardness can be compared.

[Undecim]

I have never seen such quantities as Young's modulus and elasticity modulus.
And here it is correct to talk about both hardness and rigidity. Each of these characteristics plays a role in the protective properties of ceramic armor.
As for the comparison, according to Vickers, the hardness of armor steel is up to 550, ceramics based on aluminum oxide - 1500 - 1900.

[Professor]

Quote: Undecim

I have never seen such quantities as Young's modulus and elasticity modulus.

https://en.wikipedia.org/wiki/Elastic_modulus
https://en.wikipedia.org/wiki/Young%27s_modulus

https://www.sciencedirect.com/topics/materials-science/elastic-moduli#:~:text=Elastic%20modulus%20measures%20the%20resistance,down%20a%20lot%20when%20pushed).

Quote: Undecim

And here it is correct to talk about both hardness and rigidity. Each of these characteristics plays a role in the protective properties of ceramic armor.

No. Only density and hardness. Lavrentyev generally only declared about density, but Alekseevsky VP in 1966, and then Tyden in 1969 added hardness. "Hardness" is not important at all.

Quote: Undecim

As for the comparison, according to Vickers, the hardness of armor steel is up to 550, ceramics based on aluminum oxide - 1500 - 1900.

This is the only reason why ceramics are used in booking.

[Undecim]

Professor, in what field of knowledge are you a professor?

[Undecim]

And where is there about the modulus of elasticity?

[Professor]

Quote: Undecim

Professor, in what field of knowledge are you a professor?

In the area of ​​sour cabbage soup.

Quote: Undecim

And where is there about the modulus of elasticity?

Young's modulus (E) describes tensile elasticity, or the tendency of an object to deform along an axis when opposing forces are applied along that axis; it is defined as the ratio of tension stress to tension strain. It is often referred to simply as the elastic modulus.

[Undecim]

In the area of ​​sour cabbage soup.
Got it. elastic - in English - elastic. Take the time to look through the technical dictionary.
I don't need to quote Wikipedia, and you shouldn't get carried away with it either, try to master the strength of materials.
When you become a professor not in cabbage soup, but in sopromat, then you will write categorically "No. Only density and firmness."
Best wishes, all the best.

[Professor]

Quote: Undecim

In the area of ​​sour cabbage soup.
Got it. elastic - in English - elastic. Take the time to look through the technical dictionary.
I don't need to quote Wikipedia, and you shouldn't get carried away with it either, try to master the strength of materials.
When you become a professor not in cabbage soup, but in sopromat, then you will write categorically "No. Only density and firmness."
Best wishes, all the best.

If I were you, I would not demonstrate my ignorance to the whole world. Here is Alekseevsky's article cited so far all over the world. Find the word "elasticity" or "strength" in it.
Alekseevsky V.P. On the question of the penetration of a rod into an obstacle at a high speed // Physics of Combustion and Explosion. 1966. T. 2. No. 2. P. 99–106
http://www.sibran.ru/upload/iblock/cc2/cc20db3e7845941d5b9c4dae36561a99.pdf

The article by Academician Lavrentyev is also still cited. True in the Russian Federation. Find the same words in it.
http://www.mathnet.ru/links/0b7e93a2708d12c1cf173a3b899302fb/rm7663.pdf

And then let's talk about the strength of materials with a person who is not familiar with the Young's module.
Only density and hardness.

[Undecim]

If I were you, I would not demonstrate my ignorance to the whole world.
Sound advice. Why don't you follow it? You can color your comments in all colors of the rainbow, this will not affect your ignorance in this matter, sorry for being straightforward.
The articles you cited on the issue of ceramic armor, especially the second one, have nothing to do with them at all, they feature steel homogeneous armor, for which density, especially in the case of a cumulative projectile, matters. Hence the depleted uranium inserts.
Ceramics have a different interaction mechanism. Therefore, the articles are very interesting, but out of place.
Your education seems to be humanitarian. ... All the best. Until you work out the question, do not write. No color. Hello Young.

[Professor]

Quote: Undecim

If I were you, I would not demonstrate my ignorance to the whole world.
Sound advice. Why don't you follow it? You can color your comments in all colors of the rainbow, this will not affect your ignorance in this matter, sorry for being straightforward.

I'm sorry.

Quote: Undecim

The articles you cited on the issue of ceramic armor, especially the second one, have nothing to do with them at all, they feature steel homogeneous armor, for which density, especially in the case of a cumulative projectile, matters. Hence the depleted uranium inserts.

The physics of the penetration of a solid into a solid barrier is the same for a steel and ceramic barrier. Say la vie. I can give you articles concerning only ceramics. There, too, there is no "strength and elasticity", but only "density and hardness." Learn materiel.

Hence the inserts from uranium, since it DENSE... Not elastic, not durable, but DENSE... Ceramic inserts so it is not elastic, not strong, but hard. Just solid.

Quote: Undecim

Ceramics have a different interaction mechanism. Therefore, the articles are very interesting, but out of place.

What is the "other mechanism"? Let's link to the studio. Let's laugh together.

Quote: Undecim

Your education seems to be humanitarian. ... All the best. Until you work out the question, do not write. No color. Hello Young.

Let's say that I have no education at all, but I am familiar with the Yang modulus as well as with Poisson's ratio. The latter, by the way, is important when calculating the reservation.

PS
Guess three times the name of the 2 leading companies in the field of ceramic booking and where are they located?

PPP
Do you speak English or translate?
https://www.sciencedirect.com/science/article/abs/pii/0734743X88900358

https://www.researchgate.net/publication/316942058_Effect_of_Ceramic_Properties_and_Depth-of-penetration_Test_Parameters_on_the_Ballistic_Performance_of_Armour_Ceramics
Effect of Ceramic Properties and Depth-of-penetration Test Parameters on the Ballistic Performance of Armor Ceramics

I will make your life easier. Show the formula of solid body penetration into ceramics in which there would be material parameters: strength, elasticity.

[Liam]

Clash of the Titans VO.

[Professor]

Quote: Liam

Clash of the Titans VO.

What are you talking about? Just educating a person who has no idea in terminal ballistics.

PS
Intuition suggests that the stronger the material, the less penetration of the bullet into it, but intuition is erroneous here. Strength doesn't matter. Absolutely.

[Liam]

You underestimate your opponent)
He speaks English well, in the Internet search for a dock, stubborn, ambitious, erudite. The character is really not Nordic, but it's even better, adds pepper.
I am pleased to read your battle)

[Professor]

Quote: Liam

You underestimate your opponent)
He speaks English well, in the Internet search for a dock, stubborn, ambitious, erudite. The character is really not Nordic, but it's even better, adds pepper.
I am pleased to read your battle)

In this thread he is not in the tooth with his foot.

[Undecim]

Why underestimate?
I always read his comments with interest, a very serious opponent, today there are very few of them on the site.

[Liam]

On the contrary, I wrote to the Professor that I underestimate you. The post was addressed to him

[Undecim]

Hazell Paul J. Armor: Materials, Theory, and Design
Hi Young.

[Professor]

This book is for beginners. I also have both software and hard copy. The author (Australian professor) does not remember Lavrent'ev, but he quotes Alekseevsky. By the way, he also notes two leading companies in the field of ceramic armor. So, chapter 7 "Ceramic armor". In which paragraph and on which page does the author give the formula where strength appears? Just don't merge quickly.

I am glad that now you know who Young is and that the elasticity module is named after him. Hazell Paul J. Armor: Materials, Theory, and Design, chapter 2, paragraph 2.4, page 21. Learn the materiel.

PS
I recommend Terminal ballistics Edition by Zvi Rosenberg, Erez Dekel
https://books.google.co.il/books/about/Terminal_Ballistics.html?id=KrzoDwAAQBAJ&printsec=frontcover&source=kp_read_button&redir_esc=y#v=onepage&q&f=false

[Undecim]

In which paragraph and on which page does the author give the formula where strength appears? Just don't merge quickly.
And in which comment and on which page does the strength appear for me?

[Professor]

Quote: Undecim

In which paragraph and on which page does the author give the formula where strength appears? Just don't merge quickly.
And in which comment and on which page does the strength appear for me?

Oh yes. You "rigidity is the ability of a material to resist deformation." The same Young's module. That has nothing to do with the armor qualities of ceramics.
You have stated that "And here it is correct to talk about both hardness and rigidity. Each of these characteristics plays a role in the protective properties of ceramic armor.", which is not true. The density and hardness that Alekseevsky introduced is important.

You claimed that "Ceramics have a different interaction mechanism." This is not true. I gave you links to articles and an indication of a paragraph in the book you recommended. I have pointed you to a more suitable book.

[Undecim]

This is not true
This is true. As we have already determined, for such a categorical conclusion it is necessary to have an appropriate qualification base.

[Professor]

This is true. As we have already determined, for such a categorical conclusion it is necessary to have an appropriate qualification base.

Formula in the studio.

[Undecim]

The formula for what, Young's elasticity?

[Professor]

Penetration depth as a function of material elasticity or material strength.

Penetration depth as a function of strength.

[Professor]

And now I will give you an educational program:
According to the book you recommended, rigidity does not play a role in the protective properties of ceramic armor. We look at the formula:

But according to Rosenberg:

Learn materiel. Let's continue the conversation when you are enlightened.

[Undecim]

The good thing about the Internet is that any of the struggling parties can declare themselves a winner, virtually putting their foot on the body of a defeated enemy. Moreover, if the topic under discussion is beyond the understanding of a wide audience and it will be difficult to find a referee.
However, educational programs are not carried out this way. For readers, your pictures are a dark forest. We would describe which parameters the given formulas are used to determine and which components are included in them. What if you are cheating?
The enemy language is also not available to everyone.
For example, in the same book, Rosenberg Z., Dekel E. Terminal Ballistics, there is a formula for determining the energy (W) expended in punching a plate of material with a conical head striker.

Unfortunately, you cannot insert equations into the text on the site; you have to trick it.
M is the mass of the striker,
V is the striker-obstacle characteristic of a particular pair of impact velocity,
D is the diameter of the striker,
H - plate thickness,
σr - effective resistance to hole formation in the plate.

σ0,2 is the static yield strength of the plate material.
In your opinion, does the yield point relate to strength characteristics?

[Undecim]

Some "specialist" has already managed to insert a minus. And what is wrong? Can you explain?

[Professor]

Formulas for CERAMIC booking above. Learn materiel.

I will no longer feed you.

PS
Greet Alkseevsky with Tate.

[Undecim]

And I gave you the formula for what kind of armor? Take up basic knowledge.
Hi Young.

[Professor]

Last time. Alekseevsky 1966. Link above. Start with it. Independently. I have enlightened you about Young, there will be no more free educational program and feed too.

[Undecim]

Last time.
On the calendar 2020. For fifty years, the complex of issues related to ballistic protection has undergone major changes.
Self-confidence does not replace basic knowledge. Therefore, remarks about educational program and feeding will be considered a side effect of certain complexes.
Suddenly there will be a desire, try to start with Vavilov, learn at least the difference between Young and Jung.
All the best.

[123456789]

Quote: kulinar

Quote: 123456789

It easier and smaller in size, but at the same time more dense in structure than armor steel.

Which is lighter: a pood of luminium or a pood of steel?

A pood of cotton wool!
Volume difference ...

Correct answer: a pound of cast iron

[Professor]

The creation of ceramic armor is one of the most promising trends in the development of body armor. It is lighter and smaller in size, but at the same time more dense in structure than armor steel. Plates made of corundum ceramics are able to protect not only personnel, but also air, land and sea equipment from armor-piercing bullets and shells

- said Igor Nasenkov, General Director of the Technodinamika holding.

The Shnobel Prize to him. Ceramics with a density of 2-4 tons per cubic meter is denser than steel with a density of 7.8 tons per cubic meter.

[saygon66]

- And the prices were not announced? And then "Tekhinkom" asks for a stove from 13 to 15 thousand rubles ...

[AML]

Quote: 123456789

Quote: kulinar

Quote: 123456789

It easier and smaller in size, but at the same time more dense in structure than armor steel.

Which is lighter: a pood of luminium or a pood of steel?

A pood of cotton wool!
Volume difference ...

Correct answer: a pound of cast iron

Yyy. The cotton wool will be lighter - the center of mass is higher. :)

[cat Rusich]

They make a bulletproof vest that holds a bullet from 7,62x54mm (about hitting the ribs, then ... in the hospital), they give the soldiers an AK with 5,45x39mm and say: "But you will carry more cartridges ..." - it's time to think about cartridges that can overcome such armor. As an example, "Dragon Skin" - SOV-3000 class 4 (yes, not adopted by the US army, but sold and used in PMCs). Made following the example of the Soviet ZhZL-74 (light protective vest). Today in the US KMP there is an MTV with ESAPI ceramics (14kg).

[Andrey1978]

Good news, I hope the raw materials were not bought in China. In one of the museums of the Second World War, the guide said that when testing a new sample of armor, in the presence of Stalin, the chief designer stood right behind the sheet, and this did not bother the leader at all. This is how people were confident in the fruits of their work!

[saygon66]

- It is profitable and pleasant to trade in bulletproof vests - no complaints are received against the manufacturer!

[saygon66]

- A man in Iraq got a bullet in his vest ...