李忠磊,梁伟,滕尚君,马晓霞,赵琦

• 1:太原理工大学材料科学与工程学院

摘要(Abstract)：

采用SiO2溶胶-凝胶-旋涂法对TiAl基合金表面进行涂膜。900℃循环氧化测试结果表明,TiAl基合金经SiO2溶胶两次涂膜并热处理后,其抗高温氧化性能得到了显著提高,未涂膜试样氧化一个循环(8h)后增重2.333mg/cm2,涂膜热处理试样氧化40个循环(320h)增重仅为0.6071mg/cm2。XRD和SEM对试样表层的组织结构分析及形貌观察表明,涂层主要由SiO2、Al2O3、Ti5Si3、TiSi2和Ti2Al构成,由表及里分别为SiO2层-Al2O3层-Al2O3+钛硅化合物层-Ti2Al层-TiAl片层组织基体。

关键词(KeyWords)： TiAl基合金;SiO2溶胶凝胶;高温氧化;涂层

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50171046);; 高等学校博士学科点专项科研基金(20050112001);; 山西省自然科学基金(20021051,2006011051)

作者(Author): 李忠磊,梁伟,滕尚君,马晓霞,赵琦

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