Metamagnetic shape memory alloy thin plates consolidated by compression shearing method at room temperature for thermal energy harvesting device

Hiroyuki Miki, Eijiro Abe, Sho Takeda, Makoto Ohtsuka, Manfred Kohl

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

As a powder metallurgy technique, the compression shearing method at room temperature (COSME-RT) is used for making metamagnetic shape memory alloy (MSMA) thin plates. COSME-RT is a method for consolidating a thin plate from powder raw material by a certain dynamic process that simultaneously applies a compression stress and a shearing strain to a powder material at room temperature and in ambient atmosphere. A plate of 50 μm thickness fabricated by COSME-RT using Ni-Co-Mn-In powder from ground sputtered film is cut into 2 × 2 × 0.05 mm3 and then applied to a thermal energy harvesting device. This device generates an average power density of 68 μW cm-3 and a peak power of 0.95 mW cm-3, which makes it possible to supply a small amount of electric power to a certain type of sensor or small sensor device.

Original languageEnglish
Pages (from-to)2867-2875
Number of pages9
JournalSensors and Materials
Volume32
Issue number8p3
DOIs
Publication statusPublished - 2020 Aug

Keywords

  • Energy harvesting
  • Metamagnetic material
  • Severe plastic deformation
  • Shape memory alloy

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)

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