Preliminary Characterization of Loop-Shaped Defect in the AlPdMn Icosahedral Quasicrystal by Conventional X-Ray Topography  

作　　者：WANG Jian-Bo J.GASTALDI WANG Ren-Hui 王建波;J.GASTALDI;王仁卉(Department of Physics,Wuhan Univers 430072;CRMC2-CNRS,Campus de Luminy,case 913,F-13288 Marseille Cedex 09,France)

机构地区：[1]Department of Physics,Wuhan Univers 430072 [2]CRMC2-CNRS,Campus de Luminy,case 913,F-13288 Marseille Cedex 09,France

出　　处：《Chinese Physics Letters》2001年第1期88-90,共3页中国物理快报（英文版）

基　　金：Supported by the Sino-France Cooperative Project under Grant No.4B1/002;partially by the National Natural Science Foundation of China under Grant No.19974031;he Research Fund for the Doctoral Program of Higher Education of China.

摘　　要：Loop-shaped contrasts were observed in the as-grown Al70.3Pd2o.6Mn9.1 icosahedral quasicrystal(IQC)by means of x-ray diffraction topography(Lang's method).One possible direction of the apparent Burger vectors of loopshaped defects(LSDs)was determined to be B=[110101]by the invisibility criterion,whose physical component is parallel to the two-fold axis 1/τ1/0,1/1,0/1 of the IQC.Apart from the relaxation of strain fields around the faceted dodecahedral holes and lamellar precipitates,LSDs may well originate from the growth of the quasicrystal,which shows that these defects could be a kind of intrinsic defect in the quasicrystals.

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分 类 号：TG1[金属学及工艺—金属学]