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Synthesis of nanosized tungsten powderGuangfeng Lu, Junjie Hao, Zhimeng Guo, Ruizhu Zhang, Ji Luo, and Liying Zhang Materials Science and Engineering School, University of Science and Technology...="ChDivSummary"><正>Nanosized tungsten powder was synthesized by means of different methods and under different conditions with nanosized WO3 powder. The powder and the intermediate products were......
Reaction mechanism between oxide film on surface of Al-Li alloy and CsF-AlF3 flux XUE Song-bai(薛松柏), ZHANG Ling(张 玲), HAN Zong-jie(韩宗杰), HUANG Xiang(黄 翔) College of Materials Science...; Abstract: The composition of the oxide film on the surface of Al-Li alloy was measured......
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reach above 96%,and 90W-4Ni-2Fe-3.8Mo-0.2RE alloy possesses the best integrated properties, its hardness is HRC35 and its relative density is 98%. Key words: tungsten high density alloys; nano... code: A 1 INTRODUCTION Tungsten based high-density alloys are crucial materials because of their unique combination of high density, high temperature mechanical properties, small coefficient......
A NEURAL NETWORK FOR WELD PENETRATION CONTROL IN GAS TUNGSTEN ARC WELDING J.Q. Gao1,C.S. Wu1,Y.H. Zhao1 (1.Institute of Materials Joining, Shandong University, Jinan 250061, China) Abstract:Realizing of weld penetration control in gas tungsten arc welding requires establishment of a model describing the relationship between the front-side geometrical parameters of weld pool and the back-side......
A New Family of Ce6MoO15 as Fast Oxide Ion Conductor Cao Xueqiang1,Lu Minfeng1,WANG Jingping1,Bo Qibing1,MENG Jian1,Feng Jing1,Zhang Deping1,Liu Jianfen1,Che Ping1,Fang Daqing1 (1.Key Laboratory... and oxide ionic conductivity were studied.Based on Ce6MoO15, rare earth element substitution on cerium site shows that all resulting oxides enhance the conductivity further, and have high oxide-ion......
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,喉部以机械剥蚀为主,以熔化烧蚀及热化学烧蚀为辅,其烧蚀程度最为严重；收敛段为机械剥蚀和热化学烧蚀,其烧蚀程度次之；而扩散段则发生热化学烧蚀,其烧蚀程度最低. 关键词:等离子喷涂成形；钨喉衬；热等静压；烧蚀 中图分类号:TG146 文献标志码:A Ablation property of tungsten nozzle...; 2. Hunan Metallurgy Material Research Institute, Changsha 410014, China) Abstract: The tungsten nozzle with inner diameter of 8 mm, length of 30 mm and wall thickness of 16.5 mm was produced......
变色性质研究[J]. 无机化学学报, 2005, 21(4): 538-542.XU Ying-ming, HUO Li-hua, ZHAO Hui, GAO Shan, ZHAO Jing-gui. Hydrothermal synthesis and photochromism property of superfine powders of metastable tungsten oxide[J]. Chinese Journal of Inorganic Chemistry, 2005, 21(4): 538-542. [5] COUCOU A, FIGLARZ M. A new tungsten oxide with 3D tunnels: WO3 with the pyrochlore-type structure[J]. Solid State Ionics, 1988......
layer is tungsten, aluminum and tantalum complex oxides, and the inner layer is made up of aluminum oxide. Tantalum element improves the density and stability of oxide film of aluminum oxide. The oxide...的增加呈逐渐变小的趋势.氧化膜结构大致分为3层,最外层颜色较深.1.5Ta和2Ta合金的氧化膜较致密,厚度较小.2Ta合金中氧化膜出现了与基体开裂的现象. 图3 含钽Co-8.8Al-9.8W-xTa合金氧化膜的相组成 Fig. 3 XRD patterns of oxide film of Co-8.8Al-9.8W-xTa superalloys 图4 ......
