Effects of humidity on nanometer scale wear of a carbon film |
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Authors: | Shigeki Tsuchitani Reizo Kaneko Shigeru Hirono |
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Affiliation: | aDepartment of Opto-Mechatronics, Wakayama University, 930 Sakaedani, Wakayama-shi, Wakayama 640-8510, Japan;bMEKL, Higashiyamato-shi, Tokyo, Japan;cAdvanced Film Technology Inc., 2-35-2 Hyoei, Hachioji-shi, Tokyo 192-0918, Japan |
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Abstract: | Influence of environmental humidity on scanning-scratched wear tests of a carbon film deposited by electron cyclotron resonance plasma sputtering are evaluated in both air and nitrogen with an atomic force microscope and a diamond tip. Wear depth is larger in higher humidity and also larger in air than in nitrogen. Effect of humidity on scratch load dependence and repeated scanning-scratch tests are larger in nitrogen than in air. Effect of humidity on wear is clearer in the repeated scanning-scratch test than in the scratch load dependence test especially in air, and also clearer at larger scratch load. In scratch velocity dependence test, there is a tendency that wear depth decreases with increase in logarithm of scratch velocity both in air and nitrogen. Wear models to explain the experimental results are discussed. |
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Keywords: | Wear Carbon film Oxygen Humidity |
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