Vapor-phase processing converts refractory metals into ceramics

High-temperature vapor-phase synthesis (HVS) is a combination of chemical vapor deposition, solid-state diffusion, and chemical reaction synthesis. HVS techniques developed by Thermal Technology Inc. can be used to incorporate ceramic materials directly into refractory metals and alloys, producing a wide variety of metal/ceramic composite materials. The ceramic surfaces of HVS processed materials provide both wear and corrosion resistance, protecting the unreacted interior of the host material. The properties of the reacted material can be tailored to meet the requirements of a range of applications. In general, however, the materials have relatively high thermal conductivities and, unlike conventional oxide ceramics, are not particularly susceptible to thermal shock.