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Interfacial microstructure and chemical stability during diffusion bonding of single crystal Al2O3-fibres with Ni25.8Al9.6Ta8.3Cr matrix WAN Xiao-jun1, 2, LIN Jian-guo2 1. Department of Physics and Telecommunication Engineering, Hunan City University, Yiyang 413000, China; 2. Faculty of Materia......
文章编号:1004 - 0609( 2004) 02 - 0199 - 05 激光熔覆纳米Al203等离子喷涂陶瓷涂层1 花国然1,2,黄因慧1,赵剑峰1,王蕾1,田宗军1,张建华1,张永康3 (1.南京航空航天大学机电学院,南京210016;2.南通工学院机械工程系,南通226007 3.江苏大学机械工程学院,镇江210013) 摘 要:采用x射线衍射仪,扫描电镜和显微硬度计研究了458钢表面激光熔覆纳米Al203改性Al203+ 13%T102(质量分数)陶瓷涂层的相组成,微观结构和显微硬度,同时对涂层的磨损特性进行了考察.结果表......
Trans. Nonferrous Met. Soc. China 24(2014) 3922-3928 Wetting behavior of aluminium and filtration with Al2O3 and SiC ceramic foam filters Sarina BAO1, Martin SYVERTSEN1, Anne KVITHYLD1, Thorvald ENGH2 1. SINTEF Materials and Chemistry, Trondheim 7465, Norway; 2. Department of Materials Science and E......
FeAsS,FeS2,,Au的NaClO-NaOH体系热力学分析与金的一步浸出王淀佐,邱冠周,徐竞北京有色金属研究总院中南工业大学矿物工程系摘 要:NaClO碱性体系处理含砷难处理金矿的研究已有报道,但无论从机理上还是从工艺指标上来讲都有待于深入研究.本文初步分析了金在NaClO强碱性体系中的热力学行为,不同pH值下金酸的溶液化学平衡.采用瓷球磨机,边磨边反应,消除氢氧化物固体生成物层对反应的阻止作用,实现Fe-AsS,FeS2的破坏分解和金的浸出同时进行,实现广西某选厂含砷金精矿金的一步浸出,金的浸出率在20min内达到91.9%.关键词:Gibbs自由能;平衡常数;难处理金精矿;次氯酸钠;一步浸金;......
; (4) The initial reaction temperature for reaction (3) is lower than that for reaction (4) [14]. However, the Gibbs free energy change of reaction (3) decreases less sharply...)+3Al2O(g)=Al2O3(s)+6AlCl(g) (5) Based on the data of chemical reaction and equilibrium of software (HSC), the Gibbs free energy change (ΔGΘ......