Microstructure and mechanical properties of thermoelectric nanostructured n-type silicon-germanium alloys synthesized employing spark plasma sintering

被引：42

作者：

Bathula, Sivaiah ^{[1
,2
]}

Gahtori, Bhasker ^{[1
]}

Jayasimhadri, M. ^{[2
]}

Tripathy, S. K. ^{[1
]}

Tyagi, Kriti ^{[1
]}

Srivastava, A. K. ^{[1
]}

Dhar, Ajay ^{[1
]}

机构：

[1] CSIR Natl Phys Lab, CSIR Network Inst Solar Energy, New Delhi 110012, India

[2] Delhi Technol Univ, Dept Appl Phys, Delhi, India

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 06期

关键词：

FRACTURE-TOUGHNESS; GRAIN-BOUNDARIES; YOUNGS MODULUS; HARDNESS; INDENTATION; PHASE; TRANSFORMATION; PERFORMANCE; SCATTERING; TRANSPORT;

D O I：

10.1063/1.4892879

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Owing to their high thermoelectric (TE) figure-of-merit, nanostructured Si80Ge20 alloys are evolving as a potential replacement for their bulk counterparts in designing efficient radio-isotope TE generators. However, as the mechanical properties of these alloys are equally important in order to avoid in-service catastrophic failure of their TE modules, we report the strength, hardness, fracture toughness, and thermal shock resistance of nanostructured n-type Si80Ge20 alloys synthesized employing spark plasma sintering of mechanically alloyed nanopowders of its constituent elements. These mechanical properties show a significant enhancement, which has been correlated with the microstructural features at nano-scale, delineated by transmission electron microscopy. (C) 2014 AIP Publishing LLC.

引用

页数：5

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