高強度窒化ケイ素セラミックスの開発と製品化 Development of High Strength Silicon Nitride Ceramics
Due to its superior resistance to thermal shock, wear and oxidation, and high toughness, Si<SUB>3</SUB>N<SUB>4</SUB> ceramics are expected to be used in industrial applications. However, before these Si<SUB>3</SUB>N<SUB>4</SUB> ceramics can become better established on the market, their fracture strength, fracture toughness characteristics and reliabilty must be improved.<BR>In this study, the formation mechanisms of the inside pores at the pressureless sintering conditions that yield the thick body of uniform structure were invesigated.<BR>The creep properties of sintered body were studied by analyzing the results of internal friction measurements.<BR>Hugoniot-compression curve for Si<SUB>3</SUB>N<SUB>4</SUB> ceramics with controlled microstructure were measured to study the yeilding properties under shock compression. And the correlations with Hugoniot-elastic limits and microstructure of Si<SUB>3</SUB>N<SUB>4</SUB> ceramics were considered.<BR>The degradation characteristics of bending strength of specimens after processing under various grindingg condition were evaluated.
粉体および粉末冶金 45(6), 515-522, 1998-06-15
Japan Society of Powder and Powder Metallurgy