Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 43, Issue 6, Pages 2017-2022Publisher
SPRINGER
DOI: 10.1007/s11664-013-2938-8
Keywords
Mechanical properties; high temperature; anisotropy; Bi0.5Sb1.5Te3
Categories
Funding
- National Basic Research Program of China [2013CB632502]
- Fundamental Research Funds for the Central Universities
Ask authors/readers for more resources
Bismuth telluride-based compounds have been extensively utilized for commercial application. However, thermoelectric materials must suffer numerous mechanical vibrations and thermal stresses while in service, making it equally important to discuss the mechanical properties, especially at high temperature. In this study, the compressive and bending strengths of Bi0.5Sb1.5Te3 commercial zone melting (ZM) ingots were investigated at 25, 100, and 200 A degrees C, respectively. Due to the obvious anisotropy of materials prepared by ZM method, the effect of anisotropy on the strengths was also explored. Two-parameter Weibull distribution was employed to fit a series of values acquired by a universal testing machine. And digital speckle photography was applied to record the strain field evolution, providing visual observation of surface strain. The compressive and bending strengths along ZM direction were approximately three times as large as those perpendicular to the ZM direction independent of the temperature, indicating a weak van der Waals bond along the c axis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available