METAL-CERAMICS COMPOSITE EXCELLENT IN CORROSION RESISTANCE AND WEAR RESISTANCE AND ITS PRODUCTION

摘要

PURPOSE: To produce a metal-ceramics composite having high hardness and excellent in corrosion resistance and wear resistance by mechanically alloying the pure metal powder of each metal element constituting an Ni base alloy and ceramics powder by specified amounts and thereafter subjecting it to press sintering. ;CONSTITUTION: The pure metal powder of each metal element constituting the Ni-base alloy having about 50% Ni content and the ceramics powder of 10 to 50vol.% are subjected to uniform mechanical alloying. As the ceramics powder, TiC or WC is preferably used, and its particle size is regulated to ≤1μm. The composite powder obtd. by this method is subjected to press sintering. This sintering is executed preferably at the sintering temp. of about 1000 to 1200°C by HIP or the like. In this way, The metal-ceramics composite in which the fine ceramics particles are uniformly dispersed into the matrix constituted of the Ni-base alloy and having ≥700 Vickers hardness as well as excellent in corrosion resistance and wear resistance can be obtd. with good powder recovery.;COPYRIGHT: (C)1994,JPO&Japio