Formation Behaviors of Microchannels in Reactive-Sintered Ni-Al Alloys by Sacrificial-Core Method

Abstract

We investigate the effects of process conditions on the formation behavior of microchannels in reactive-sintered Ni-Al alloys as a part of a study to develop a powder-metallurgical process to produce a transpiration-cooling device including microchannel networks for a disaster preventing robot. The microchannel was successfully produced by a sacrificial-core method with a compact specimen composed of Ni and Al elemental powders when a moderate heating pattern was employed for sintering.