γ-TiAl金属间化合物表面改性技术研究现状  

Current Status of Surface Modifications on γ-TiAl Intermetallics

作　　者：贺志勇[1] 刘小萍[1] 王振霞[1] 徐重[1] 

机构地区：[1]太原理工大学表面工程研究所,太原030024

出　　处：《材料导报》2007年第2期83-86,共4页Materials Reports

基　　金：国家自然科学基金(50271045);国防科工委民口配套项目(MKPT-05-067);山西省自然科学基金(20031051);山西省留学基金(2004020)

摘　　要：γ-TiAl基金属间化合物具有良好的高温力学性能,密度仅为目前广泛应用的镍基高温合金的1/2左右,因而是很有应用前景的航空材料。γ-TiAl的主要弱点之一是抗高温氧化能力差,特别是在800℃以上,氧化更为严重。此外,γ-TiAl的硬度较低,摩擦学性能较差。解决这些问题的有效途径是表面改性处理。介绍了目前针对γ-TiAl的表面改性技术研究现状,结合改性效果及机理评述了各类技术的优势与局限。γ-TiAl intermetallics possesse superb high temperature mechanical properties and very low density, and is believed to be the potential substitute to nickel-base super alloys which are widely used as high temperature structural materials in aero-industry currently. A major drawback of γ-TiAl is insufficient oxidation resistance at high temperature, especially above 800℃. Besides, the tribological performance of γ-TiAl is also tmsatisfactory. Surface modification is feasible solution to these problems. In this paper, a review of studies on surface modification of γ-TiAl is presented and comments are made about various processes on the basis of modification effects and mechanisms.

关 键 词：TIAL金属间化合物 表面改性 抗氧化 耐磨性 

分 类 号：TG146.23[一般工业技术—材料科学与工程]