5 thoughts on “Diamonds are harder than iron, why can the hammer easily break the diamond?”
Joshua
First of all, we need to understand that the so -called hardness refers to the ability of the material surface to resist squeezing, that is, abrasion resistance. The carbon atom structure inside the diamond is arranged into tetrahedron, which is very stable, so the diamonds are high. But this also causes some cracks and misplaces of diamonds. This principle is also used for diamond cutting. If there are diamonds with obvious cracks and inserting special tools in the cracks, you can get two diamonds with low internal purity but high value.
It slightly polishing can eliminate external defects. For example, the glass hardness of the mobile phone screen is relatively low, and scratches will appear after a long period of use, so there are too many stalls in the mobile phone film. Similarly, because the diamond is hard enough, the tool used to cut the glass is to use diamonds to achieve a hard -hard purpose to cut the glass. Secondly, because the brittleness or fracture toughness of the diamond is different from the hardness, it can be smashed with a hammer. Its fracture toughness is several levels lower than the metals such as hammer. If the metal tool is used to scrape the surface of the diamond, it will basically not scratch, which is a manifestation of its hardness; but it is different with the hammer. At this time, the principle of use is that the metal's fracture toughness is higher than that of diamond, so it can be crushed. In short, due to its low crispyness, diamonds are similar to glass in impact. This is why the mobile phone screen is easily broken once it falls. Someone has developed a gem screen that has developed a mobile phone, but it cannot be officially released, because even if the diamond screen is used, the screen of the mobile phone will still break, but it can increase wear resistance and has little meaning to users. We should also pay attention to the diamond ring and other accessories, do not fall or smash them, otherwise they may break or even break. The famous crispy case is that the Titanic sinks. We all know that the ship broke down quickly after hitting the iceberg. Theoretically, the ship represented the highest shipbuilding technology at that time and used the strongest materials. Not so fragile. When investigating the real cause of the accident, the experts found that the hits part of the steel plate containing a large amount of sulfide, which was to unilaterally increase the hardness of the hull, but ignored its brittleness. When the ship is close to the glacier, the crispness of the steel will increase sharply due to the low temperature of the seawater, and the unprecedented tragedy will occur. Therefore, the people on the ship have no time to respond.
n00:00 / 00: 5770% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds ←: single fast retreat 5 seconds Press hold up and hold it up. Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
You confuse a concept. The hardness and brittleness should be separated. The hardness refers to wear resistance, and the crispness refers to the broken toughness. For example, if you take a small iron piece on the surface of the diamond, it will not have scratches, because diamond hardness is higher than iron. But you smashed the diamonds, and the diamonds were crispy, and of course it was crushed in minutes.
Because the hammer can crush the diamond because it is not because the hammer is hard, but because the person who takes the hammer is very powerful, and the work is more.
First of all, we need to understand that the so -called hardness refers to the ability of the material surface to resist squeezing, that is, abrasion resistance. The carbon atom structure inside the diamond is arranged into tetrahedron, which is very stable, so the diamonds are high. But this also causes some cracks and misplaces of diamonds. This principle is also used for diamond cutting. If there are diamonds with obvious cracks and inserting special tools in the cracks, you can get two diamonds with low internal purity but high value.
It slightly polishing can eliminate external defects. For example, the glass hardness of the mobile phone screen is relatively low, and scratches will appear after a long period of use, so there are too many stalls in the mobile phone film. Similarly, because the diamond is hard enough, the tool used to cut the glass is to use diamonds to achieve a hard -hard purpose to cut the glass. Secondly, because the brittleness or fracture toughness of the diamond is different from the hardness, it can be smashed with a hammer. Its fracture toughness is several levels lower than the metals such as hammer. If the metal tool is used to scrape the surface of the diamond, it will basically not scratch, which is a manifestation of its hardness; but it is different with the hammer. At this time, the principle of use is that the metal's fracture toughness is higher than that of diamond, so it can be crushed.
In short, due to its low crispyness, diamonds are similar to glass in impact. This is why the mobile phone screen is easily broken once it falls. Someone has developed a gem screen that has developed a mobile phone, but it cannot be officially released, because even if the diamond screen is used, the screen of the mobile phone will still break, but it can increase wear resistance and has little meaning to users. We should also pay attention to the diamond ring and other accessories, do not fall or smash them, otherwise they may break or even break.
The famous crispy case is that the Titanic sinks. We all know that the ship broke down quickly after hitting the iceberg. Theoretically, the ship represented the highest shipbuilding technology at that time and used the strongest materials. Not so fragile. When investigating the real cause of the accident, the experts found that the hits part of the steel plate containing a large amount of sulfide, which was to unilaterally increase the hardness of the hull, but ignored its brittleness. When the ship is close to the glacier, the crispness of the steel will increase sharply due to the low temperature of the seawater, and the unprecedented tragedy will occur. Therefore, the people on the ship have no time to respond.
n00:00 / 00: 5770% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds ←: single fast retreat 5 seconds Press hold up and hold it up. Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
You confuse a concept. The hardness and brittleness should be separated. The hardness refers to wear resistance, and the crispness refers to the broken toughness. For example, if you take a small iron piece on the surface of the diamond, it will not have scratches, because diamond hardness is higher than iron. But you smashed the diamonds, and the diamonds were crispy, and of course it was crushed in minutes.
Because the hammer can crush the diamond because it is not because the hammer is hard, but because the person who takes the hammer is very powerful, and the work is more.
This is because although diamonds are harder than iron, they will be crushed when they are greatly effective, so this phenomenon will occur.