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. The results show that, the Ag-2.5Cu-8MoS2 get better friction and wear properties and lower friction coefficient, the wear rate is 24×10-14m3/(N·m), the friction coefficient is 0.122; The addition..., the addition of carbon fiber obviously increases the friction coefficient of materials, the friction coefficient increases from 0.122 to 0.154 (CF) and 0.167 (SCF), respectively. The improving wear......
during the hammer operation. The wear rate and friction coefficient measured in these tests are reported in Table 1. Table 1 Wear rate of DLC coating and coefficient of friction (COF) in water 3... in water for short time. The expected protective action of the chromium layer is then confirmed. The values of the friction coefficient are in agreement with those reported for DLC coatings deposited......
炭/炭复合材料表面氧化硼减摩涂层研究 薛晖1,付前刚1,孙国岭1,李贺军1,胡志彪1 (1.西北工业大学,超高温复合材料重点实验室,炭/炭复合材料工程技术研究中心,陕西,西安,710072) 摘要:通过料浆法在碳化硅涂层炭/炭复合材料表面制备了三氧化二硼涂层.采用XRD,SEM对涂层的结构和表面形貌进行了表征,并对涂层的摩擦性能进行了测试,同时还探讨了涂层的润滑机理.结果表明:所制涂层的摩擦系数为0.06~0.08,比炭/炭复合材料的摩擦系数(0.15~0.18)低,减磨效果明显.究其原因主要在于三氧化二硼涂层在空气中,表面层将转变为硼酸,具有自润滑能力. 关键词:炭/炭复合材料; B2O3; 摩擦系数; 磨损; C/C composite; B2O3; Friction coefficient; Wear; [全文内容正在添加中] ......
Effect of precipitation on internal friction of AZ91 magnesium alloy LIU Shu-wei(刘树伟), JIANG Hai-chang(姜海昌), LI Xiu-yan(李秀艳), RONG Li-jian(戎利建) Department of Materials for Special... friction (IF) of AZ91 magnesium alloy was investigated by using X-ray diffraction (XRD) analysis, scanning electron microscope (SEM) observation, and dynamic mechanical analysis (DMA). Six different......
and stable friction coefficient. The friction and wear behaviors of C/C-SiC composites are affected by carbon fiber content. When the volume fraction of fiber is 10%, the material has moderate friction coefficient and lower wear rate. The length of carbon fibers significantly influences the friction and wear behaviors of C/C-SiC composites. When the length of carbon fiber is 12 mm, the material has......
conductivity of the materials gradually increase, while the hardness decreases monotonously. With increasing zinc powder content, the curve of the nominal friction coefficient shows fluctuating trend but the lowest friction coefficient also shows an increase. However, the wear rate and braking noise of the friction material monotonously decrease with increasing zinc content. This effect may be attributed......
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with the increase of the testing loads. The friction coefficient of composites with 6.8% h-BN holds the largest decreasing range, which reaches 0.049, while the composites with 10.1% h-BN have the lowest strength and wave-like fluctuated friction coefficient with the increase of the loads. The composites with 3.4% or 20.7% h-BN remain hold low and stable volume wear loss with the increase......
Repair welding process of friction stir welding groove defect LIU Hui-jie(刘会杰), ZHANG Hui-jie(张会杰) State Key Laboratory of Advanced Welding Production Technology, Harbin Institute...; Abstract: The groove defect formed in the friction stir welding dramatically deteriorates weld appearances and mechanical properties......
Trans. Nonferrous Met. Soc. China 22(2012) 1064-1072 Correlation between welding and hardening parameters of friction stir welded joints of 2017 aluminum alloy Hassen Bouzaiene, Mohamed-Ali Rezgui...; accepted 1 January 2011 Abstract: An experimental study was undertaken to express the hardening Swift law according to friction stir welding (FSW) aluminum alloy 2017. Tensile tests of welded joints......
