タケダ　ショウ   Syo Takeda   武田　翔    所属   石巻専修大学  理工学部    職種   准教授
言語種別	英語
発行・発表の年月	2017
形態種別	研究論文（学術雑誌）
査読	査読あり
標題	Cu-based MoS2-dispersed composite material formed by the compression shearing method at room temperature
執筆形態	未選択
掲載誌名	Tribology Online
出版社・発行元	Japanese Society of Tribologists
巻・号・頁	12(2),pp.29-36
著者・共著者	Sho Takeda,Hiroyuki Miki,Hiroyuku Takeishi,Toshiyuki Takagi
概要	Cu/MoS2 composite material was formed by a novel powder-molding technique, which is termed the compression shearing method at room temperature (COSME-RT). Cu/MoS2 sample mechanical and tribological properties and microstructures were investigated. Samples were prepared using five different MoS2 concentrations between 0 to 20 vol.%. No unwanted compounds were generated by the Cu and MoS2 because a high temperature is unnecessary in COSME-RT. Scanning electron microscopy observations confirmed that the MoS2 particles were dispersed homogeneously in the Cu host matrix. The indentation hardness of Cu/MoS2 with 0, 1.0 and 5.0 vol.% MoS2 was higher than 1.6 GPa, and is higher than that formed by conventional powder metallurgy methods and a pure Cu plate. The indentation hardness of the Cu/MoS2 decreased with increasing MoS2 concentration. In contrast, the lubricating performance of MoS2 became more pronounced at 5.0 vol.% or above. The coefficient of friction of Cu/MoS2 with 5.0, 10 and 20 vol.% MoS2 was ∼0.20, and is the same as for MoS2 in air. The sample coefficient of friction was maintained because of lubrication by forming a transferred film of wear debris that contained MoS2. Cu/MoS2 had a low coefficient of friction, but maintained its material strength at 5.0 vol.% MoS2.
DOI	10.2474/trol.12.29
ISSN	1881-2198/1881-2198