As a result of diamond and metal alloy between have very high interfacial energy, the diamond particles cannot be generally low melting point alloy by infiltration, poor adhesion, the traditional manufacturing technology, diamond particles by carcass shrinkage after mechanical clamping force is embedded in the matrix metal matrix, and did not form a strong chemical bond or metallurgical bonding of diamond particles, leading to the work is easy and the metallic matrix based separation, greatly reduce the diamond tool life and performance levels. Most of impregnated diamond utilization rate is low, a large number of expensive diamond work shed to scrap. Lin Zengdong pioneered the use of diamond surface metallization of diamond surface technology to give many new characteristics, such as good thermal conductivity, good thermal stability, improve its original physical and chemical properties, improve the metal or alloy solution soakage etc.

Metallization of diamond surface problems on century 70 time caused domestic and international diamond tool manufacturing industry seriously highly. Many people committed to the sintering process of diamond surface metallization of diamond surface, the matrix material is added or pre glued on strong carbide metal powder ( the diamond without prior to heating, not with the coating chemical reactions occur, only belongs to the diamond coating ), in order to expect them to sintering process for diamond chemical bond. Although the literature has demonstrated some metals such as tungsten (not to be oxidized ) under the low temperature (800 degrees Celsius ) can be formed on the surface of the WC layer of diamond.