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| AIST produced a silicon nitride sinter exhibting extremely high strength and toughness in a specific direction. Silicon nitride exhibits higher covalent bond strength and much better stability at high temperatures than oxide ceramics. While some practical applications have recently been found for silicon nitride such as in engine parts, including automobile grade turbo chargers, use has been limited because, despite being the toughest among ceramics, silicon nitride has a fracture toughness that is one or more decimal places lower than that of metallic materials. This technology shows a method for the production of a high-strength high-toughness silicon nitride sinter by an inexpensive process.manufacture high-strength high-toughness silicon nitride sinter raw material powder added prescribed amount sintering additive |
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