用饱和硝酸铝和硝酸镍溶液在室温下真空浸渍气孔率大约为15%的氧化铝坯体,然后干燥、煅烧,经过多次循环获得理想致密度的纳米/微米氧化铝基陶瓷复合材料.以X射线衍射(XRD)、扫描电子显微镜(SEM)和能谱仪(EDS)研究了复合材料的物相组成、元素分布、显微结构及气孔率随浸渍次数的变化.经过饱和硝酸镍溶液浸渍13次后,氧化铝坯体的气孔率由14.42%降低到8.89%,Al2O3/NiAl2O4复合材料由α-Al2O3和NiAl2O4尖晶石组成;经过饱和硝酸铝溶液浸渍8次后,氧化铝坯体的气孔率由13.33%降低到9.68%,Al2O3复合材料由α-Al2O3组成.Al、Ni和O在复合材料基体中均匀分布.
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