金属陶瓷复合材料性能优异,用途广泛,但两者间的剧烈反应,会影响其最终性能.以化学纯氧氯化锆和尿素为原料,水为溶剂,硝酸钇为氧化锆晶型稳定剂,利用溶胶-凝胶法在三维网络-碳化硅(3D-meshy SiC)基体表面涂覆以Zr(OH)_4形式存在的溶胶,采用分级干燥工艺,经700℃煅烧,制备了氧化锆薄膜,作为两者界面反应的阻挡层.利用红外吸收光谱法(IR)、热重分析(TG)和差热分析(DSC)法研究了凝胶在加热时的物理-化学变化,采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)分析了薄膜的物相和显微结构.结果表明:在经过自氧化处理的基体表面制备出了致密、平整、均匀,厚为0.5～0.8 μm的四方相氧化锆薄膜,此膜与基体结合牢固.
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