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High Temperature Strength Behavior of Ceramic Versus Metal Substrates

1990; Linguagem: Inglês

10.4271/902170

2688-3627

Suresh T. Gulati, K. Pattabhi Reddy, David F. Thompson,

High-Velocity Impact and Material Behavior

The high temperature strength and deformation behavior of ceramic and two different metal substrates were measured in the 25-1200 degree C temperature range in uniaxial and biaxial bending using rectangular bars and circular discs, respectively, prepared from the substrates. The data show that both of the metal substrates exhibit permanent deformation and lose their load carrying capability by an order of magnitude above 800 degrees C. The ceramic substrate, on the other hand, preserves its strength and behaves elastically over the entire temperature range exhibiting neither permanent deformation nor cell distortion. These data suggest that the upper use temperature for metal substrates could be significantly lower than that for ceramic substrates to meet 50-100K vehicle mile durability. (A) For the covering abstract see IRRD 851463.