TiAl型金属间化合物解理断口的纳米尺度研究

金属学报, 1995, 31(5): 191-196.

TiAl型金属间化合物解理断口的纳米尺度研究

北京科技大学

中国科学院化学研究所

基金项目: 国家自然科学基金

关键词：Ｔｉ_３Ａｌ金属间化合物 , cleavage fracture , nanometer scale , STM

STUDY OF CLEAVAGE FRACTURE SURFACE OF TiAl ALLOYS IN NANOMETER SCALE

ZHANG Yue , CHU Wuyang , WANG Yanbin , QIAO Lijie , XIAO Jimei(Universityof Science and Technology Beijing , Beijing 100083) , WANG Zhonghuai

Keywords： : Ti3Al intermetalic alloy , 解理断口 , 纳米尺度 , ＳＴＭ

采用隧道扫描显微镜（ＳＴＭ）对Ｔｉ３Ａｌ及Ｔｉ－２４Ａｌ－１１Ｎｂ试样在空气中拉伸的解理断口进行了研究。结果表明，ＳＴＭ可以揭示出解理断口上存在许多纳米尺度的细节，如纳米尺度的微台阶、微孔洞（微韧窝）及空位等。

The cleavage fracture surfaces of Ti_3Al and Ti-24Al-11Nb samples after tensile tests in air were studied with a scanning tunnel microscope(STM). Many details in nanometer scale were revealed on the fracture surfaces by STM, such as nanometer scale steps, dimples and vacancies. The study of the details on the fracture surfaces will be helpful to the study of the mechanism of fracture.

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