Diamond is also called "diamond". It is a kind of natural mineral. It is the hardest material in the natural world. The diamond is made of carbon under the high pressure and high temperature of the earth. Elemental crystals.
Due to its high temperature resistance, fast heat dissipation, strong light transmission and anti-corrosion properties, diamonds are widely used in industrial materials and have an irreplaceable position. Even so, countries around the world are still looking for harder materials than diamonds because diamonds are too precious to meet human needs.
Since diamonds are so important, are there any substances that are harder than it?
In fact, research on superhard materials began in the late 1980s when an American scientist proposed a formula for calculating the hardness of an object. This formula shows that β-C3N4 should be harder than anything else.
The blue-gray material of amorphous carbon and nitrogen can be easily fabricated in the laboratory, but science and technology have proven that it is extremely difficult to obtain superhard crystals.
In order to get a substance that is harder than diamonds, researchers can do their best. They placed a thin layer of carbon nitrogen and titanium nitrogen at room temperature and fired gas molecules toward the solid target using a method called "magnetron sputtering." As a result, the gas molecules remove the atoms from the target surface and chemically bond with them, and finally reflect back from them and precipitate on the nearby surface.
The team also emitted nitrogen molecules onto a half-coated carbon-coated titanium target. When the target rotated, the nitrogen atoms were alternately struck on the material and produced a continuous carbon-nitrogen on the surface of the target. Layer and titanium nitride layer. Titanium and non-crystalline carbon and nitrogen are hard materials, while pale pink synthetic materials are twice as hard as any of them. However, it is still not as hard as diamonds.
However, research is still going on, because things that are harder (and cheaper) than diamonds will have a vast use of space. Superhard materials can be used to cut steel, which diamonds can't do. It should burn after the diamond is heated. Similarly, it is impossible for us to apply a layer of diamond to the metal.
If a mechanical layer of gears and bearings is coated with a layer of β-C3N4, they will last longer than ordinary parts, and can be used on equipment where liquid lubricants are not suitable. A thin layer of β-C3N4 can also be used to protect the surface of a computer disc.
With the continuous development of materials science, scientists have successively developed boron nitride and blue silk (also known as hexagonal diamond, hexagonal carbon). These two substances are 15% and 58% higher, respectively, than diamonds, but these two substances are very rare and less stable.
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