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in the microstructure and joint performance of Mg-Cu joints. However, diffusion bonding can be used to join these alloys without much difficulty. This work analyses the effect of parameters on diffusion layer... relationships were developed to predict diffusion layer thickness, hardness and strength using response surface methodology. It is found that bonding temperature has predominant effect on bond characteristics......
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Effect of Rare Earths on Diffusion Coefficient and Transfer Coefficient of Carbon during Carburizing 刘志儒1,阎牧夫1 (1.School of Materials Science and Engineering, Harbin Institute of Technology,) Abstract:The diffusion coefficient of carbon in surface layer of steel-20 rare earth carburized at 880 ℃ and 900 ℃ for 8 h was calculated by substituting the measured layer depths into the diffusion......
in Teflon-lined autoclave at 120 °C after pre-depositing by dip-coating at room temperature. No visible cracks, pinholes or other defects were observed on the membrane layer. The gas separation studies... an increase with the increase of temperature. This different behaviour of CO2 was reported by ZHAO et al [43]. The permeance of gas depends on the relative values of activation energy for diffusion......
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以不同PAN系炭纤维布制备燃料电池气体扩散层之研究 刘璟翰1,廖元楷1,柯泽豪1 (1.逢甲大学材料科学与工程学系,台湾,台中) 摘要:采用石墨化PAN系炭纤维布制备了高分子电解质燃料电池气体扩散层.通过电学实验,X-ray绕射与元素分析考察了所制气体扩散层的性能.结果表明:随热处理温度的升高,气体扩散层的电阻率降低,L.增加,d002减小.高温处理后的炭纤维布作为高分子电解质燃料电池气体扩散层显示了较高的电池效能. 关键词:燃料电池; 气体扩散层; 石墨化; Fuel cell; Gas diffusion layer; Graphitization; [全文内容正在添加中] ......
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. These results suggest that the α-terpineol molecule layer could better block the diffusion of gas through the liquid film than DF200 and MIBC. The simulation results indicate that the foam stability... how the layer of frother molecules absorbs at the gas-liquid interface, the Forcite module is used in this work. The smart module is selected as the algorithm and the convergence criteria is set to 1......
reveal that the pyrocarbon coating can improve the properties of carbon paper used for electrode materials of fuel cell. Key words: fuel cell; gas diffusion layer; carbon fiber paper; chemical vapor... for electrocatalytic oxidation of methanol [J]. Electrochemistry Communications, 2007, 9: 2229-2234. [8] DU Chun-yu, WANG Bao-rong, CHENG Xin-qun. Hierarchy carbon paper for the gas diffusion layer......