ベース油中CN<i>x</i>の摩擦界面その場反射分光分析による摩擦メカニズムの解明  [in Japanese] The Clarification of Friction Mechanism in Oil Lubrication for CN<i>x </i>Coating by <i>In-Situ </i>Observation of Friction Area with Reflectance Spectroscopy  [in Japanese]

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Author(s)

Abstract

<p>To clarify the low friction mechanism of CN<i>x </i>coating in PAO oil lubrication, we measured reflectance spectrum at friction area <i>in-situ </i>by reflectance spectroscopy during friction test against a sapphire hemi-sphere pin in PAO oil. We observed and estimated thickness of PAO oil film, surface roughness of CN<i>x </i>coating, thicknesses and polarizability of transformed layer formed on bulk CN<i>x </i>coating during friction test by analyzing reflectance spectrum. We proposed that the decreasing of load ratio of boundary lubrication mode to total load is the one of governing factor to reduce friction on the basis of the increasing of Λ value. Also we proposed the increasing of adsorption of PAO oil to the CN<i>x </i>transformed layer is the second governing factor on the basis of the increasing of polarizability of PAO oil and transformed layer, that leads to the increasing of van der Waals force between transformed layer and PAO oil as low friction mechanism of CN<i>x </i>in PAO oil lubrication.</p>

<p>To clarify the low friction mechanism of CN<i>x </i>coating in PAO oil lubrication, we measured reflectance spectrum at friction area <i>in-situ </i>by reflectance spectroscopy during friction test against a sapphire hemi-sphere pin in PAO oil. We observed and estimated thickness of PAO oil film, surface roughness of CN<i>x </i>coating, thicknesses and polarizability of transformed layer formed on bulk CN<i>x </i>coating during friction test by analyzing reflectance spectrum. We proposed that the decreasing of load ratio of boundary lubrication mode to total load is the one of governing factor to reduce friction on the basis of the increasing of Λ value. Also we proposed the increasing of adsorption of PAO oil to the CN<i>x </i>transformed layer is the second governing factor on the basis of the increasing of polarizability of PAO oil and transformed layer, that leads to the increasing of van der Waals force between transformed layer and PAO oil as low friction mechanism of CN<i>x </i>in PAO oil lubrication.</p>

Journal

  • JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS

    JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS 63(11), 755-767, 2018

    Japanese Society of Tribologists

Codes

  • NII Article ID (NAID)
    130007511397
  • NII NACSIS-CAT ID (NCID)
    AN10056166
  • Text Lang
    JPN
  • ISSN
    0915-1168
  • NDL Article ID
    029377686
  • NDL Call No.
    Z16-540
  • Data Source
    NDL  J-STAGE 
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