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What is a sintering process?

bourne Boreway machinery 2015-09-25 17:04:34
Sintering, it is to point to the powder material into a compact body, is a traditional process. People have long used the technology to produce ceramics, powder metallurgy, refractory materials, ultra high temperature materials. In general, after molding powder, the density is obtained by sintering body is a kind of polycrystalline material, the microstructure consists of crystal, vitreous, and porosity. Sintering process directly affect the microstructure of grain size, pore size and shape and distribution of grain boundary, which affect the performance of the material.In diamond tool industry, the sintering process of the cutting tools commonly used in sintered diamond drill bits, sintered diamond saw blade and sintered diamond abrasive.

Macro definition: at high temperatures (not higher than the melting point), green solid mutual bonding, grain growth, the gap (porosity) and grain boundary, less through material, its total volume shrinkage, density increased, finally has become something of a microstructure of dense polycrystalline sintered body, this phenomenon is called sintering. 

Microscopic definition: between the molecules of a solid (or atoms) to attract each other, by heating the particle gain enough energy to migrate, make the powder body produces particles cohere, strength and densification and recrystallization process called sintering.