Diamond can not only be processed into valuable jewelry, but also has great potential in industry. It is high hardness, wear resistance, can be widely used in cutting, grinding, drilling; due to high thermal conductivity, good electrical insulation, can be used as a semiconductor device heat sink; it has excellent light transmission and corrosion resistance, in the electronics industry has also been widely used. 18th century, people found that the price of the noble diamond is a carbon isotope, from then on, the preparation of man-made diamond became the many scientists' The preparation of artificial diamonds has been the honor and dream of many scientists ever since.
A century later, graphite, another monomaterial form of carbon, was discovered, and attempts were made to mimic the natural process of transforming graphite into diamond at ultra-high temperatures and pressures. To shorten the reaction time, special conditions of 2,000 degrees Celsius and 55,000 atmospheres of pressure were needed.
In 1955, the United States General Electric Company specializing in the manufacture of high-temperature and high-pressure electrostatic equipment, to get the world's first industrial artificial diamond small crystals, thus creating an industrial-scale production of artificial diamond abrasive precedent, and now their annual output of about 20 tons; Soon, DuPont invented the explosion method, the use of transient explosions generated by the high-pressure and the rapid rise in temperature, but also obtained a few mm size of artificial diamond.
Diamond film is slightly inferior to diamond particles, being somewhat lower in density and hardness. Even so, it is one of the most wear-resistant, with a film only 5 micrometers thick and a lifespan more than 10 times longer than that of tungsten carbide steel. We know that the record needle in the tiny contact surface to withstand great pressure, at the same time require extremely long wear-resistant life, as long as the tip of the needle deposited on a layer of diamond film, it can be easily on the battlefield. If the outside of the plastic, glass with diamond film to do wear-resistant coating, can greatly expand its use, the development of superior performance and economic products.
More importantly, the appearance of the film makes the application of gold stone break through the fence can only be used as a cutting tool, so that its excellent thermal, electrical, acoustic and optical properties can be fully realized. At present, diamond film has been applied in semiconductor electronic devices, optical acoustic devices, pressure processing and cutting tools, etc., its development speed is amazing, in the field of high-tech more attractive.