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[期刊论文][Full-length article]

Synergetic enhancement of thermoelectric and mechanical properties of n-type SiGe-P alloy through solid state synthesis and spark plasma sintering

作者：	Murugasami R;Vivekanandhan P;Kumaran S;Suresh Kumar R;John Tharakan T;

出版年：2019

页码：110483 - 110483

出版社：Elsevier BV

摘要：

Silicon-germanium (SiGe) alloy is a potential and an attractive high temperature (>1000 °C) thermoelectric material used in space applications as radioisotope thermoelectric generators (RTGs). However, the lower figure of merit ( ZT ) is the main setback in the SiGe alloy, and a lot of research strategies are demonstrated to improve the performance. The current investigation details the fabrication of high dense (>99%) SiGe alloy doped with phosphorus (P) (0.5–2.0 at.%) by mechanical alloying (10 h) followed by spark plasma sintering (SPS). The synthesised SiGe-P_2.0 at.% alloy demonstrates the enhanced ZT 1.03 at 750 °C. Concurrently, the superior hardness of 9.8 ± 0.17 GPa and fracture toughness (K_IC) of 2.3 ± 0.15 MPa√m are achieved in SiGe-P_1.5 at.% and SiGe-P_2.0 at. % alloys, respectively.

关键字：

Thermoelectric materials ; Silicon-Germanium alloy ; Mechanical milling ; Spark plasma sintering ; Mechanical properties

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所属期刊

Materials Research Bulletin

ISSN: 0025-5408

来自：Elsevier BV