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%, respectively. The results indicate that with the increase of graphite content, the contact resistance of electrical contacts is enhanced to a certain level then remains constant. Friction coefficient... conductivity, decline of friction surface temperature and inhibition of adhesive wear between composites and slip rings. Key words: CNTs-Ag-G electrical contact material; graphite; contact resistance......
are ignored, and the thermal contact conduction is decided by the following factors, such as the real contact area, the thickness of surface layers (oxide films, alloy layers and lubrication layer) and the temperature. The recent researches about the thermal contact resistance are mainly under the condition of the static interface without sliding[9], elastic deformation and small strain plastic......
Mechanism of effect of rare earth oxides on high temperature corrosion resistance of weld metal LI Zhi-yong(李志勇)1, WANG Bao(王 宝)1 , ZHANG Han-qian(张汉谦)2 1. College of Materials Science... Abstract: Through the addition of rare earth oxides into the coating of electrodes, the high temperature oxidation and sulphidation resistance of weld metal were studied. The transfer mechanism......
cracking and so on. Of these properties, the resistance of weld metal to solidification cracking has been paid much attention to, especially for aluminum alloy[1-5]. Solidification cracking appears... Solidification crack susceptibility of aluminum alloy weld metals LIU Ren-pei(刘仁培)1, DONG Zu-jue(董祖珏)2, PAN Yong-ming(潘永明)2 1. College of Materials Science and Technology, Nanjing University......
and Ti2O3 obviously improve the wear resistance of TiAl alloy. The wear rate is -3.27×10-7 g/(N?m). Key words: TiAl alloy; micro-arc oxidation coating; additive; corrosion resistance; wear resistance 1... composed of sodium citrate, graphite and sodium tungstate was studied. Structure and composition of MAO coatings on TiAl alloy were analyzed, the corrosion and wear resistance of MAO coating were......
Visual sensing of weld pool in variable polarity TIG welding of aluminium alloy ZHANG Guang-jun(张广军), YAN Zhi-hong(闫志鸿), WU Lin(吴 林) State Key Laboratory of AWPT, Harbin Institute of Technology...; Abstract: The passive visual sensing method was successfully applied to monitor the weld pool in TIG welding of aluminium alloy......
Effect of current density on corrosion resistance of micro-arc oxide coatings on magnesium alloy YANG Yue(杨 悦), WU Hua(吴 化) Key Laboratory of Advanced Structural Materials, Ministry... that the MgO coating produced in the electrolyte Na2SiO3 at current density of 5 A/cm2 shows the best corrosion resistance. Key words: magnesium alloy; micro-arc oxidation; current density; corrosion......