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METHOD FOR PRODUCING SILICON NITRIDE WEAR RESISTANT MEMBER 发明申请

2023-05-03 4190 230K 0

专利信息

申请日期 2025-07-13 申请号 JP2007184723
公开(公告)号 JP2007308368A 公开(公告)日 2007-11-29
公开国别 JP 申请人省市代码 全国
申请人 TOSHIBA CORP
简介 PROBLEM TO BE SOLVED : To provide a method for producing a silicon nitride wear resistant member which has high strength and high toughness, and further, in particular, excellent rolling characteristic. SOLUTION : The method for producing the silicon nitride wear resistant member is characterized by suppressing the maximum value of the width of aggregation/segregation existing in the grain boundary phase to 5 μm or less by preparing a formed body by forming a raw material mixture, obtained by adding 2-10 mass% of a rare earth element in terms of oxide, 2-7 mass% of MgAl2O4spinel, 1-7 mass% of silicon carbide, and ≤5 mass% of at least one kind selected from the group comprising Ti, Hf, Zr, W, Mo, Ta, Nb and Cr in terms of oxide, to silicon nitride powder having an average particle diameter of ≤1.0 μm and containing ≤1.5 mass% of oxygen and ≥90 mass% of α-phase type silicon nitride, and then sintering the prepared formed body at a temperature of ≤1, 600°C in a non-oxidizing atmosphere. Further, a similar action/effect can be obtained even by using a mixture of MgO and Al2O3in place of MgAl2O4spinel. COPYRIGHT : (C)2008, JPO&INPIT


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