TY - JOUR
T1 - Effect of grain boundary on the friction coefficient of pure Fe under the oil lubrication
AU - Adachi, Nozomu
AU - Matsuo, Yasutaka
AU - Todaka, Yoshikazu
AU - Fujimoto, Mikiya
AU - Hino, Masahiro
AU - Mitsuhara, Masatoshi
AU - Oba, Yojiro
AU - Shiihara, Yoshinori
AU - Umeno, Yoshitaka
AU - Nishida, Minoru
N1 - Funding Information:
This research was supported by Japan Science and Technology Agency under Collaborative Research Based on Industrial Demand “ Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials ” (Grant No. JPMJSK1511 ) and JSPS KAKENH I Grant-in-Aid for Scientific Research (B) JP (Grant No. 15H04155). The authors would like to express their thanks to Dr. K. Narita of Idemitsu Kosan Co., Ltd. for providing lubricant oils for this research. The authors are greatful to Prof. R. Tero of Toyohashi University of Technology for assistance with the atomic force microscopy. The authors also would like to express their thanks to Dr. R. Kokawa of Shimadzu Corporation and Dr. S. Moriguchi of Shimadzu Techno-Research, Inc. for useful discussions on frequency-modulation atomic force microscopy.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3
Y1 - 2021/3
N2 - In this study, the effect of grain boundary on the frictional behavior under the oil-lubricated condition was investigated by varying the grain size (crystallite size) of the pure Fe samples prepared via physical vapor deposition. A high fraction of grain boundary in the sample yielded a low friction coefficient μ in the case of a lubrication oil that formed a chemisorbed film on the surface of the material. Thick absorbed layer formed on the surface was observed only in the sample with high fraction of grain boundary. These results indicate that a disordered structure in the vicinity of grain boundary preferentially forms chemisorbed films and reduces μ by protecting the surface of the material.
AB - In this study, the effect of grain boundary on the frictional behavior under the oil-lubricated condition was investigated by varying the grain size (crystallite size) of the pure Fe samples prepared via physical vapor deposition. A high fraction of grain boundary in the sample yielded a low friction coefficient μ in the case of a lubrication oil that formed a chemisorbed film on the surface of the material. Thick absorbed layer formed on the surface was observed only in the sample with high fraction of grain boundary. These results indicate that a disordered structure in the vicinity of grain boundary preferentially forms chemisorbed films and reduces μ by protecting the surface of the material.
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U2 - 10.1016/j.triboint.2020.106781
DO - 10.1016/j.triboint.2020.106781
M3 - Article
AN - SCOPUS:85097453641
SN - 0301-679X
VL - 155
JO - Tribology International
JF - Tribology International
M1 - 106781
ER -