The mechanical properties of sintered metal-glass materials

Summary

• 1. The strength of metal-glass materials is governed by the strength of their metallic skeleton. By itself, glass added to a charge exerts virtually no strengthening of the material, but promotes the development of shrinkage processes in the metallic skeleton, thereby raising the mechanical properties of metal-glass materials.

• 2. The strength of metal-glass materials is determined by diffusion processes between the particles forming the metallic skeleton. Glass effectively activates the sintering process. Sinterning temperature exerts a similar influence on the shrinkage and strength of metal-glass materials: as sintering temperature rises to 850°C, both shrinkage and strength increase, while at 900–1050°C minimum values of shrinkage and strength are observed as a result of the α → γ transformation; with subsequent rise in sintering temperature, both shrinkage and strength increase.

• 3. The strength of two- and single-component sintered materials is described by Ryshkewitsh's equation; it was established that the value of the coefficient B is sensitive to sintering temperature and the type of mechanical test.