Microstructure and mechanical properties of thermoelectric nanostructured n-type silicon-germanium alloys synthesized employing spark plasma sintering
Creators
- 1. Department of Applied Physics, Delhi Technological University, Delhi (India)
- 2. CSIR-Network of Institutes for Solar Energy, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012 (India)
Description
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
Additional details
Identifiers
- DOI
- 10.1063/1.4892879;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 105
- Journal Issue
- 6
- Journal Page Range
- p. 061902-061902.5
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 46024187
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- FRACTURE PROPERTIES; GERMANIUM ALLOYS; HARDNESS; MICROSTRUCTURE; NANOSTRUCTURES; N-TYPE CONDUCTORS; SILICON; SILICON ALLOYS; SINTERING; THERMAL SHOCK; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- ALLOYS; ELECTRON MICROSCOPY; ELEMENTS; FABRICATION; MATERIALS; MECHANICAL PROPERTIES; MICROSCOPY; SEMICONDUCTOR MATERIALS; SEMIMETALS
Optional Information
- Notes
- (c) 2014 AIP Publishing LLC