| 摘要 |
The silicon nitride sintered body containing alpha-SiAlON is prepared by (A) mixing silicon nitride(Si3N4) with aluminum nitride(AlN) and yttria(Y2O3) as sintering aid., (B) moulding and sintering the mixture, and (C) hydrating part of aluminum nitride using a mixed solvent of alcohol and water during the mixing process.. Distilled water is added to the mixed solvent in aratio of less than 0.5 of distilled water to AlN. The obtained product, which is composed of 5-75% alpha-SiAlON and 25-95% beta-Si3N4, has relative density of more than 99%, a good wear-resistance, a high temperature strength and a good fracture toughness.
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