Abstract
Boron and epoxy-resin gaskets were characterized in terms of pressure generation in the 20 GPa region using a Bridgman-type opposed anvil apparatus made of sintered diamond (SD). As compared to pyrophyllite, boron and epoxy resin exhibited markedly large internal friction. It was recognized that the properties of boron and epoxy resin as a gasket can be modified by changing their composition or by adding layered materials such as mica. Stress analysis of the anvils was performed by a finite-element method using the evaluated value of the internal friction of the gasket. The breakage behavior of the SD anvils were then described on the basis of the evaluated properties of the gaskets used.
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