Uniform dispersion of SiC in Yb-filled skutterudite nanocomposites with high thermoelectric and mechanical performance

Zhenxing Zhou, Jianlin Li, Yuchi Fan, Qihao Zhang, Xiaofang Lu, Shengjie Fan, Keiko Kikuchi, Naoyuki Nomura, Akira Kawasaki, Lianjun Wang, Wan Jiang

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Although filled skutterudites are very promising thermoelectric (TE) materials at intermediate temperature, most of the high-performance skutterudites reported are multiple-filled materials that tend to have poor stability and machinability. Here, we successfully fabricate single-filled skutterudite based composites with uniformly dispersed β-SiC nanoparticles via cryogenic grinding and spark plasma sintering. The nanocomposites show not only increased Seebeck coefficient owing to a possible energy filtering effect, but also reduced lattice thermal conductivity through enhanced phonon scattering. A maximum ZT value of 1.42 at 850 K with greatly improved mechanical properties is achieved, which is very attractive for the application in TE devices.

Original languageEnglish
Pages (from-to)166-171
Number of pages6
JournalScripta Materialia
Volume162
DOIs
Publication statusPublished - 2019 Mar 15

Keywords

  • Cryogenic grinding
  • Mechanical properties
  • Nanocomposite
  • Spark plasma sintering
  • Thermoelectric materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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