Hot isostatic pressing process and its influencing factors of fracture toughness and the corresponding toughening mechanisms

Cermet is an integrated high performance hard materials, wear, corrosion and heat resistance and other fields have broad application prospects. This paper uses X-ray diffraction, scanning electron microscopy, X-ray spectroscopy, transmission electron microscopy and other experimental means of cermet sintering, hot isostatic pressing process and its influencing factors of fracture toughness and the corresponding  Abrasive grinding  mechanisms and other content a systematic study, and the fine grain Mo_2FeB_2 cermet technology for the preparation of preliminary exploration. First studied the sintering temperature, holding time, heating rate and sintering  synthetic diamond  on cermets and properties. The results showed that the sample in the liquid near the (1030 ℃ -1080 ℃) to 2 ℃ / min heating rate, by 1250 ℃ vacuum sintering 40min, to the contraction of its consistent tissue is relatively uniform, relatively good mechanical properties. Studied cermets hot  abrasive grinding  treatment process. The results show that the hot isostatic pressing treatment increases cermet hard phase particle size, particle consolidation and dissolution - precipitation mechanism is the main reason for the increase of their particle size.