ISSN (print) 0914-4935
ISSN (online) 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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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, and Manfred Kohl

(Received May 7, 2020; Accepted July 22, 2020)

Keywords: metamagnetic material, shape memory alloy, severe plastic deformation, energy harvesting

As a powder metallurgy technique, 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 kind of 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 with 50 μm thickness fabricated by COSME-RT using ground Ni-Co-Mn-In sputtered film powder is cut into 2 mm × 2 mm × 0.05 mm 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.

Corresponding author: Hiroyuki Miki




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