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Texture Analysis of Superconducting Films Basedon YBCO System

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Textures in different layers of superconductors based on YBGO system are analyzed using the methods of pole figure and conventional Φ scans. It is shown that the Φ scanning technology has only 1-dimensional description and could omit some information of 3-dimensional orientation distribution, which will in-fluence the superconductor quality. The pole figure method, in contrast, demonstrates the orientation distribution 2-dimensionally and gives a comprehensive view of thin film texture, which is a much better method for texture analysis in superconducting films,in which there is commonly an unique high sharpness texture com-ponent.
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D0I:10.13374/j.issn1001053x.2000.04.037 Vol.22 No.4 唐勇等:电脉冲作用下T8钢凝固组织的改变 311· 参考文献 4哪红春,何冠虎,周本濂,等.脉冲电流对S-Pb合金凝 1 Masayuki Nakada,Yuh Shiohra,Merton C Flemings. 固组织的影响.金属学报,1997(4):353 Modification of Solidification Structures by Pulse Electric 5周尧和,胡壮麒,介万齐.凝固技术北京:机械工业出 版社,1998.445 Discharging.ISIJ International,1990,30(1):27 2 Barak JP,Precher A FS,Conrad H.Colony(grain size) 6案荣山,鄂红春,何冠虎,等.直接晶化法制备块状纳米 Reduction in Eutectic Pb-Sn Casting by Electropulsing.Ser 材料的探索I脉冲电流下无序金属介质的成核理论, Metall Mater,1995,32(6):879 材料研究学报,1995,93):219 3 LiJianming,LiShengli,Li Jin,Lin Hantong.Modification 7 Qin R S,Su S X,Guo J D,et al.Suspension Effect of Nan- of Solidification Structure by Pulse Electric Discharging. ocrystalline Grain Growth under Electropulse.Nanostruc- Ser Metall Mater,1994,31(12):1691 tured Materials,1998,10(1):71 Improvement of T8 Steel Solidification Structure by Electropulse Treatment TANG Yong,WANG Jianzhong,CANG Daqiang,WANG Jingsong,ZHAO Yuxiang Metallurgy Engineering School,UST Beijing,Beijing 100083,China ABSTRACT The Grain sizes of solidification structure of T8 liguid steel were reduced significantly after electropulse treat ment.The form of dendrites was disappearing when the electropulse voltage rose.The shape of steel perlites was also changed after electropulse A empirical equation was obtained between the number of crystals and electropulse voltage. KEY WORDS electropulse treatment;T8 steel solidification structure;perlite Texture Analysis of Superconducting Films Based on YBCO System Nan Chen,Weimin Mao 1)Material Science and Engineering School,University of Science and Technology Beijing,Beijing 100083 China 2)Department of Materials Science and Engineering,University of Petroleum,Beijing 102200,China (Received2000-04-10) Abstract:Textures in different layers of superconductors based on YBCO system are analyzed using the me- thods of pole figure and conventional scans.It is shown that the scanning technology has only 1-dimen- sional description and could omit some information of 3-dimensional orientation distribution,which will in- fluence the superconductor quality.The pole figure method,in contrast,demonstrates the orientation distribu- tion 2-dimensionally and gives a comprehensive view of thin film texture,which is a much better method for texture analysis in superconducting films,in which there is commonly an unique high sharpness texture com- ponent. Key words:superconductor;thin film texture;YBCO;pole figure (From:Journal of University of Science and Techonlogy Beijing(English Edition),2000,7(2):107)

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