231 耐摩耗性および耐食性を有するDLC膜の開発(コーティング・溶射・薄膜プロセス)

概要

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Diamond-like carbon (DLC) films have high hardness among the amorphous carbon films, and its excellent characteristics as low friction coefficient and wear resistance enable DLC coatings to be applied to a lot of stainless steels like machine members and tools for antiwear coatings. However, a martensite stainless steel is inferior to an austenite stainless steel in corrosion resistance and further improvements of anti-corrosion by DLC coating are strongly expected. The purpose of this study is to coat DLC films which have high wear and corrosion resistances on martensite stainless steel substrates (SUS440C) which have the highest hardness in stainless steel. DLC films with Cr interlayer were deposited by a pulse plasma CVD after fabricating Cr interlayer using a magnetron sputtering. As a fundamental test, the adhesion strength was investigated by a scratch test, and then the tribological properties as well as the corrosion behavior were evaluated. A ball-on-disk (BoD) test and an electrochemical measurement lead us to conclusion that an optimal structure to improve both tribological property and anticorrosion property was substrate/Cr/Si-C : H/DLC.
一般社団法人日本機械学会の論文
2009-11-06