トライボロジスト
Online ISSN : 2189-9967
Print ISSN : 0915-1168
ISSN-L : 0915-1168
64 巻 , 6 号
特集・鋼用表面処理の基礎知識と最新動向
選択された号の論文の12件中1~12を表示しています
会告
目次
連載・トライボロジーを語る
特集・鋼用表面処理の基礎知識と最新動向
解説
解説
  • 伊藤 元博
    2019 年 64 巻 6 号 p. 344-351
    発行日: 2019/06/15
    公開日: 2019/06/15
    ジャーナル 認証あり

    Along with the recent progress of automobiles and industrial machinery, needs for high-function lubricants have also been increasing. The needs are promoting introduction of non-conventional materials and approaches to research and development of lubricants. They include, for example, cellulose nanofibers as a grease thickener and thickener observation techniques with a confocal laser scanning fluorescence microscope and micro-Fourier transform infrared spectrometer. Also, computational chemistry is growing in usage to analyze tribochemical phenomena of lubricants. This article outlines the recent trends of lubricant research and development.

トライボロジー・ナウ・トライボロジー海外体験記 ―アラウンド・ザ・ワールド―
学術論文
  • 小池 亮, 鈴木 厚, 栗原 和枝, 足立 幸志
    2019 年 64 巻 6 号 p. 356-365
    発行日: 2019/06/15
    公開日: 2019/06/15
    [早期公開] 公開日: 2019/04/17
    ジャーナル フリー

    Recent years, the viscosity of motor oils gets lower in order to decrease resistance in the fluid lubrication region. On the other hands, friction in the boundary lubrication region increases, and this causes the possibility of seizure. In such circumstance, MoDTC is widely used as friction modifier to reduce friction in boundary lubrication. But it is well known that the low friction effect of MoDTC is depending on the conditions such as metal composition. So, it is required to understand the reason why metal composition affects reactivity of MoDTC. For this objective, we tried to appear the mechanism why tribo-film structure is different by metal composition. As a result of analysis of tribo-film structure on some kind metal substrate, the structure of low friction tribo-interface is clarified as follows; as the amount of Cr in metal substrate increases, the thickness of tribo-film is thinner. And Cr oxide exists at the interface between the Cr rich substrate and the tribo-film. So we considered that the oxidation of Cr affects the ease of decomposition of MoDTC and the thin film thickness, because Cr is easily to oxidize and Cr forms passive film. From this consideration, we made clear that making use of Cr rich metals can obtain low friction in MoDTC contained oil.

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