Open-ended Terms: Gas-pressure bonding. Solid-state-bonding by the gas-pressure-bonding process employs a gas at high pressure and elevated temperature in order to fabricate metallic or ceramic materials. The process has been used to produce metallurgical bonds between similar and dissimilar metals, ceramics, and cermet materials. It appears to be ideal for fabricating brittle materials or materials of widely differing properties. Consolidation of metallic and ceramic powders to densities approaching theoretical is readily accomplished by gaspressure bonding at temperatures well below those normally required in sintering operations, and the resulting grain growth is held to a minimum. Numerous configurations have been fabricated from Be and Nb by the gas-pressurebonding process. Examples are cited of typical nuclear fuel elements and various structural components of interest for aircraft and missile application. (Author).