摘要
采用固体粉末包埋法在TiAl基合金表面渗硅,着重研究了渗硅层在高温强气流冲击条件下的抗循环氧化性能,用XRD及SEM/EDS分析了渗硅层氧化后的成分结构和形貌。结果表明,渗硅后形成以Ti5Si3、Al2O3和TiSi2、Si为主的复合渗层,在高温强气流冲击条件下,表面生成以SiO2为主的氧化层并与Al2O3层紧密结合。900℃循环氧化时间小于160h时,渗硅层在强气流冲击下的抗氧化性与静态空气中基本相同;氧化时间超过160h后增重略高于静态空气氧化。TiAl基合金渗硅后表现出良好的抗高温强气流循环氧化性能。
Solid powder silinconizing is adopped in order to improve the oxidation resistance of TiAl-based alloys. The cyclic oxidation resistance has been tested at high temperature and in strong flowing air. XRD and SEM/EDS are used to analyze the silinconized specimens after oxidation. The results show that a silinconized composite layer composed of TisSi3, Al2O3, TiSi2 and Si is formed on the surface of TiAl-based alloy. After oxidation, an oxide layer mainly composed of SiO2 and tightly bound with Al2O3 layer is formed on the surface. Combined with TisSi3 layer, the composite layer improves the oxidation resistance obviously for the TiAl-based alloy at high temperature and in strong flowing air.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期2007-2010,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助(50171046)
山西省自然科学基金资助(2006011051)
高等学校博士学科点专项科研基金资助(20050112001)
关键词
TIAL基合金
渗硅
高温与强气流
抗氧化
TiAl-based alloy
siliconizing
strong flowing air
oxidation resistance
作者简介
滕尚君，男，1982年生，硕士研究生，太原理工大学材料科学与工程学院，山西太原030024，电话；0351-6018398
