In 1796, British scientist Tennant first revealed that diamond is composed of pure carbon through the famous experiment of burning diamond to produce carbon dioxide. From then on, mankind began to embark on the journey of exploring synthetic diamond. After various attempts and efforts, it was not until the middle of the 20th century that the Graphite-Diamond equilibrium phase diagram was obtained by Simon and Berman through experiments and speculation, which made artificial synthesis possible.
In 1953, Sweden Liander and others successfully synthesized diamond through high temperature and high pressure (HPHT) technology. Subsequent studies have shown that if catalysts such as boron oxide, lithium nitride, calcium nitride or magnesium nitride are added, the synthesis pressure and temperature can be reduced to 4~7GPa and 1200~1700℃ respectively. The diamond and CBN microcrystals have since begun to be used in abrasives, and synthetic diamond abrasive and cubic boron nitride abrasive have begun to be widely applied.
As for the CVD produced CBN film materials, although there were reports about manufacturing CBN film in 1979, it was not until 1987 that CBN film was reported to be actually made. Researches found that there are generally other transition layers of BN structure between the substrate and the CBN film, which affect adhesion perofrmance. As the science and technology developing, the thickness of the CBN film has reached 2 to 3 μm, and the adhesion performance to the substrate has been improving.
It was not until the 1990s that the nano-scale diamond crystallites synthesized through explosive method entered the market. This method can obtain 5nm diamond powder due to the extremely fast cooling rate.
It was only in the 1960s that materials research scholars began to directly apply natural diamond, cvd synthetic diamond and cubic boron nitride to material cutting, grinding and whittling through simple bonding or welding.
Around the 1990s, leading companies and research institutions materials industry in the world also began to develop new superhard materials. With the advancing of research and development, people have discovered simple substances or compounds composed of light element atoms such as carbon, boron, nitrogen, and oxygen, as well as compounds formed by these light elements and transition cluster elements (W, Re, Ir, Pt, Os, etc.). All those materials are extremely hard, and their hardness mainly attribute to the above mentioned simple substances and compounds forming a three-dimensional network structure with high atomic stacking density and super covalent bonds, high bonding energy, and extremely high resistance to external forces. As a professional abrasive manufacturer, Eagle will closely follow the development trend of superhard materials and strive to provide you with the highest quality superabrasives.
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