利用非均相沉淀法制备了平均粒径小于50 nm的α-Al2O3/W(Ni)复合粉体,并研究对比了纳米钨和镍对α-Al2O3相转变温度的影响.结果表明:纳米钨和镍的存在均可降低过渡型氧化铝向α型氧化铝转变的相变温度,但降低程度有所不同,含钨氧化铝于1000℃完成相变,而含镍氧化铝于1150℃完成相变;并且纳米第二相体积比越大,对相变温度的影响也越大.
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