513 微細表面構造を持つ摺動面の摩擦特性におけるマイクロ気体流動の影響(T07-3 流体及び界面におけるナノ構造と流動特性(3),大会テーマセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

論文の詳細を見る
Diamond-coating is promising for sliding surface because it produces very low friction. Nakamori et al. found experimentally that the friction between a partly polished diamond-coated surface and a metal surface was drastically reduced to zero as relative speed was increased. In their experiment, sliding became noiseless. This indicates that the substrate with diamond coating takes off the counter surface and the sliding mechanism is gas film lubrication. In the present work, we investigate the floating mechanism and the effect of micro gas flow on friction properties by performing numerical simulations. Since the surface roughness of the partly polished diamond-coated substrates is from 0.28 gm to 0.57 gm, Knudsen number Kn is larger than 0.1. Therefore, a flow between two sliding surfaces cannot be treated as a continuum. To simulate this flow, we use the direct simulation Monte Carlo (DSMC) method.
一般社団法人日本機械学会の論文
2008-08-02