γ-TiAl的循环氧化行为  

Cyclic oxidation behavior of γTiAl in air

作　　者：王薇[1] 张永刚[1] 史晶宇 陈昌麒[1] Vicent.Ji 

机构地区：[1]北京航空航天大学材料科学与工程系,北京100083

出　　处：《中国有色金属学报》2000年第3期318-322,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金! ( 5 9895 15 3 )

摘　　要：采用增重法研究了γ TiAl合金在 112 3K和 1173K空气中循环氧化的动力学曲线 ,用配有能谱的扫描电子显微镜对氧化层的形貌和显微结构进行了分析 ,用X射线衍射仪测定了氧化层中的残余应力。研究结果表明 :温度是影响γ TiAl合金循环氧化性能的重要因素。氧化膜的剥落发生在金属 /氧化层界面 ,其剥落途径为 :氧化层先脱附凸起 ,而后发生剥落。The cyclic oxidation behavior of γ TiAl in air has been studied at 1 123 K and 1 173 K. The morphology and microstructures of the oxide scales were examined by SEM equipped with EDS. The residual stress of oxide scale was measured by X ray stress instrument. The results indicated that temperature is an important factor affecting the properties of cyclic oxidation, the oxide scale spalls at interface between the metal and scale with possible mechanism of spallation in localised decohesion and buckling before the oxide/metal interface fails. [

关 键 词：循环氧化 残余应力 氧化层 Γ-TIAL 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG172.82[金属学及工艺—金属材料]