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Estimation of mass transfer coefficient in ozone absorption by linear least square fitting and simplex search methodsHAI Jing(海景)1, ZHANG Gang(张刚)2, CHENG Jiang(程江)2(1. South China Institute..., to determine the ozone mass transfer coefficient during absorption and both methods give almost the same mass transfer coefficient. While for chemical absorption with ozone decomposition reaction......
-Ni surface sliding over soft graphite under water lubrication. The influences of applied load and the application history on the wear of surface were addressed in our experimental design. Wear of both...Wear behavior of WC-Ni sliding against graphite under water lubricationGaolong Zhang,Ying Liu,Yuechang Wang,Fei Guo,Xiangfeng Liu,Yuming WangThe State Key Laboratory of Tribology, Tsinghua University......
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configuration with 500 μm amplitude. The influences of the load, frequency and aqueous media on the friction coefficient and wear loss of the film were analyzed. The results show that the friction coefficient...: aluminum alloy; micro-arc oxidation; corrosion wear; friction coefficient 铝合金因其比强度高,耐腐蚀性好等优点,而在航空航天业上得到广泛应用,尤以民用飞机上的用量最大,约为70%~80%,在军用飞机上的用量则为40%~60%[1] 但铝合金的硬度低,耐磨性差,因此,在实际应用中对铝合金进行适当的表面处理以增强其抗蚀抗磨能力已成为必不可......
Diffusion Coefficient of Lanthanum in Al-Cu Alloy常开国,赵敏寿摘 要:<正> In molten salt media,the rate of mass transfer process is slower than... is the rate determining step in anelectrochemical reaction.The diffusion coefficient of lanthanum in Al-Cu alloy is determined byelectrochemical method,which will provide very important data for the study......
Coefficient of thermal expansion of stressed thin films WANG Zheng-dao(王正道), JIANG Shao-qing(蒋少卿) Institute of Mechanics, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China Received 10 April 2006; accepted 25 April 2006 Abstract: A new technique was proposed to determine the coefficient of thermal expansion (CTE) of thin films at low temperature......
pressure; stress field; frequency response function; influence coefficient... transformation (FFT). The contact pressure and the stress field in the subsurface are obtained by employing conjugate gradient method (CGM) and discrete convolution fast Fourier transformation (DC-FFT......
parts due to their low friction coefficient and high wear resistance in vacuum and dry gas conditions. Their low friction coefficient is based on the lamellar structure, where a sheet of M atom... to the low friction coefficient. The high hardness of the DLC coating contributes to its extremely low wear rate [13]. In order to achieve good tribological properties both in humid air and high vacuum......
PREPARATION OF HIGH THERMAL EXPANSION COEFFICIENT PORCELAINS FUSED TO METALS J.P.Yang1,J.Q.Wu1 (1.Dept. of Inorganic Materials, South China University of Technology, Guangzhou 510640, China... and 50%o of low fused temperature frit has an average TEC of 19.2× 10-6/° C from room temperature to 450°C, which is much higher than the common porcelains. Key words:thermal expansion coefficient......
Equivalent Activity Coefficient Phenomenon of Cerium Reacting with Lead or Bismuth in Ag, Cu and Zn Alloy 钱乙余1,薛松柏1,董健2 (1.National Key Laboratory of Advanced Welding Production Technology, Harbin... coefficient in Ag, Cu and Zn-base alloy was calculated and analyzed by using the ternary system Chou model. The thermodynamic calculation results show that the "equivalent activity coefficient phenomenon......
