Oil retaining capability and sliding friction behaviour of porous copper with elongated cylindrical pores |
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| Authors: | Hao Du Jianzhong Qi Yuanxia Lao Tianying Xiong |
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| Affiliation: | 1. State Key Laboratory of Coal Resources and Safe Mining, College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;2. School of Management, Shanghai University of Engineering Science, Shanghai 201620, China;1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;2. Institute for Environmental Pollution and Health, Shanghai University, Shanghai 200444, China;3. Center for Environmental Science in Saitama, Saitama 374-0115, Japan;4. School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China;2. Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH 03755-8000, USA;3. Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia |
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| Abstract: | Porous copper with elongated cylindrical pores aligned either axially or radially was fabricated under a high pressure of mixture gas of hydrogen and argon. Structure characterization indicated that pore size increased, pore density decreased, pore size distribution became wider with an increase in porosity for the porous copper. The dependence of oil retaining capability and sliding friction coefficient on porosity and pore size of the porous copper were investigated. It was found that the oil content of the porous copper depended mainly on the porosity, and reached 27.6% on the specimen with a porosity of 47.1%. On the other hand, the oil efficiency was not satisfactory, and became worse when the porosity increased, which was attributed to the increase in pore size and the wider pore size distribution for the porous copper. It was proven that the impregnated oil in the pores played an important role in improving the sliding friction behaviour of the porous copper. |
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