Mechanical Properties and Heat Treatment Research on Machinable Glass-ceramic

A new kind of machinable glass-ceramic was prepared by the sintering methods which has the high K-IC, flexural intensity and other good mechanical properties so that it could be machined using the normal machinable methods such as turning, milling and drilling. The hardness and flexural intensity which was the main mechanical property factor influenced the machined ability was researched in detail with the help of TG-DSC, SEM, metal loscope, Hv hardness and flexural intensity measurements. Based on the orthogonal design methods (L(25)5(4)) and numerical solution, the effects of the heat treatment about devitrification on the mechanical properties were analyzed and concluded that the mechanical properties was mainly influenced by the crystal temperature and heat holding time.