Development of SHS/HIP Processing

Abstract

A variety of new material processing techniques have been developed by combining Self-prop-agating High-temperature Synthesis (SHS) with HIP technology. SHS/HIP nitriding makes it possible to produce unique complex powders, such as Si₃N₄-SiC and NbN_1-xC_x, or nitrided Ti and Nb components. SHS/HIP sintering can be used to fabricate new composites such as functionally gradient materials. SHS/HIP casting completes the sysnthesis and simultaneously forms the NiAl intermetallic. Accompanied by chemical heats of 2000 K or more, these processes can be completed within instants. This paper reviews recent developments in the SHS/HIP process and the resulting materials.