侯猛,王小祥

• 1:浙江大学材料科学与工程学系

摘要(Abstract)：

在600～900℃温度下,0.5～72 h时间范围内空气气氛下对Ti6Al7Nb进行热氧化,根据增重曲线计算其氧化动力学规律,利用XRD、XPS分析表面氧化层的相组成、成分和价态,并以Ti6Al4V合金做为比照。结果表明,Ti6Al7Nb合金较Ti6Al4V合金抗氧化能力更强。同等氧化条件下,Ti6Al7Nb合金的氧化速率常数(k)更小。对短时间(1 h)氧化的样品的表面分析显示:各合金元素均以最高价态或稳定价态存在,其中Al和V被富集,而Nb则贫化;另外,Ti6Al7Nb合金和Ti6Al4V合金氧化层主要由金红石型TiO2(R-TiO2)组成,Al2O3相仅出现在900℃Ti6Al4V合金样品中。

关键词(KeyWords)： Ti6Al7Nb合金;热氧化;XPS

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 侯猛,王小祥

DOI: 10.13289/j.issn.1009-6264.2010.07.005

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