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MICROSTRUCTURE AND MORPHOLOGY OF PHASES IN LASER REMELTING CERAMIC COATINGS |
WU Qiuhong;TAO Zengyi;CUI Kun(Huazhong University of Science and Technology;Wuhan 430074);HE Lianlong;LI Douxing;YE Hengqiang(Institute of Metal Research;Chinese Academy of Sciences;Shenyang 110015)(Manuscript received 1994-07-28;in revised form 1995-03-01) |
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Cite this article:
WU Qiuhong;TAO Zengyi;CUI Kun(Huazhong University of Science and Technology;Wuhan 430074);HE Lianlong;LI Douxing;YE Hengqiang(Institute of Metal Research;Chinese Academy of Sciences;Shenyang 110015)(Manuscript received 1994-07-28;in revised form 1995-03-01). MICROSTRUCTURE AND MORPHOLOGY OF PHASES IN LASER REMELTING CERAMIC COATINGS. Acta Metall Sin, 1995, 31(11): 508-512.
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Abstract Microstructure,morphology and composition of the phases in 2 kW laser remelted Al_2O_3-13wt-%TiO_2 ceramic coatings on ICr18Ni9Ti substrate were examined by using electron diffraction, diffraction contrast image and EDAX. Results showed that TiO_2 and a part of Al_2O_3 formed Al_2TiO_5 and a superlattice phase appeared in the ceramic layer;a little alloy element of substrate permeated into α-Al_2O_3 and replaced only a part of Ti in Al_2TiO_5.The distribution and morphology of α-Al_2O_3 and Al_2TiO_5 were related with the distance from surface.The shape of Al_2TiO_5 was strip near surface and block near substrate,and the farther from surface,and the more Al_2TiO_5 in the coatings.
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Received: 18 November 1995
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1樱井良文,小泉光慧编,陈俊彦,王余君译,新型陶瓷材料及应用,北京:中国建筑工业出版社,1983:202戴安邦,沈孟长.元素周期表.上海:上海科学技术出版社,1979:13MosinB,LynchRW,ActaCrystallogr,1972;B28:10404饶东生.硅酸盐物理化学,北京:冶金工业出版社,1980:20b |
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