Oasis Materials Corporation

Robert J Tesch

Jonathan H Harris

Frank J Polese

Stephen P Nootens

Sorin Dinescu

William L Bradbury

Casey C Clausen

A monolithic, substantially hermetic joining or bonding of two or more aluminum nitride ('AlN') ceramic components is made by promoting transient liquid phase sintering near the contact areas between the components. In a first approach, AlN particles are combined with a rare earth oxide sintering additive such as yttrium oxide (YO) in a joining paste can be applied between the joining surfaces of fired ceramic preformed components prior to final firing to weld the components together. In a second approach, the additive is added to green mixture, and the components having different shrinkage aspect ratios are mated and cofired in an atmosphere containing a partial pressure of the additive. The additive encourages wetting and diffusion of the liquid phases present on the surfaces of ceramic interface particles in the contact areas during final firing.

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Phoenix, AZ, United States of America

Robert J Tesch