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本文介绍用化学共沉淀和在适当温度下煅烧以直接制备ＹＡＧ－Ａｌ２Ｏ３纳米复合粉体的新方法．ＸＲＤ结果表明，所得粉体具纯的ＹＡＧ和α－Ａｌ２Ｏ３相，因此其化学组成符合配料的组分设计．用本方法制备的２５ｖｏｌ％ＹＡＧ－Ａｌ２Ｏ３复合粉体经热压烧结，所得的致密体材料为晶内型纳米复合材料，其抗育强度达 ６１２ＭＰａ，断裂韧性为 ４．５４ＭＰａ·ｍ－１／２，都比单相 Ａｌ２Ｏ３陶瓷有大幅度提高。
This article describes a new method for the direct preparation of YAG-Al2O3 nanocomposite powders by chemical coprecipitation and calcination at appropriate temperatures. XRD results show that the resulting powder with pure YAG and α-Al2O3 phase, so its chemical composition in line with the ingredients of the design. The 25 vol% YAG-Al2O3 composite powder prepared by the method is sintered by hot-pressing, and the obtained compact body material is an in-grain type nanocomposite with a tensile strength of 612 MPa and a fracture toughness of 4.54 MPa · m -1/2 , Than single-phase Al2O3 ceramics have greatly increased.