Α-sialon and its manufacturing method for the sintered body

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PROBLEM TO BE SOLVED : To provide an α-sialon sintered compact having high hardness and toughness, and a method of manufacturing the α-sialon sintered compact at a low cost. SOLUTION : The α-sialon sintered compact uses silicon (Si) powder as raw material powder, is obtained through the nitride reaction sintering of silicon and composed essentially of ≥95 wt.% α-sialon particle expressed by a composition formula, Rx(Si, Al)12(O, N)16(where, 0.33COPYRIGHT : (C)2005, JPO&NCIPI