针对Al2O3/Al复合材料中金属相Al对其高温性能的不利影响,本试验在高温下将铝合金熔体氧化渗透到注浆成型的SiC/Ni多孔预制体中, 制备了Al2O3/SiC/Ni/Al-Si多相陶瓷基复合材料.借助光学显微镜、电子显微镜(SEM)、X射线衍射仪(XRD)、波谱仪(EDS)等手段分析了预制体和复合材料的相组成、微观结构及界面特征.结果表明,复合材料的主晶相为Al2O3与SiC,相间存在Al(Si)复合氧化物、NiAl2O4及Ni与Al-Si合金相,各相界面处成分呈连续过渡变化趋势,构筑了具有模糊界面特征的多相复合材料.
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