研究了表面施加含有不同量Y2O3的Cr2O3和Al2O3薄膜对Cr2O3形成合金Fe25Cr在1000℃、104 Pa O2环境中高温氧化的作用.结果发现含Y氧化物薄膜明显降低了Cr2O3层的生长速度,而且含Y复合氧化物薄膜的作用大于单一Y2O3薄膜.此时,Cr2O3层表面形貌发生了较大的变化.间接证据表明Cr2O3的生长机制由阳离子向外扩散为主转变为阴离子向内扩散为主.通过表面施加含Y的氧化物薄膜产生了全面的"活性元素效应".
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