金属学报  1981, Vol. 17 Issue (4): 386-490

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关于GH302合金中μ相空间群的研究——μ相简单六方点阵的电子衍射

赵伯麟;苗柏和;陈国良

ON THE SPACE GROUP OF μ-PHASE IN SUPERALLOY GH302——ELECTRON DIFFRACTION OF PRIMITIVE HEXAGONAL LATTICE μ-PHASE

by Zhao Bolin;Miao Bohe and Chen Guoliang

赵伯麟;苗柏和;陈国良. 关于GH302合金中μ相空间群的研究——μ相简单六方点阵的电子衍射[J]. 金属学报, 1981, 17(4): 386-490.
, , . ON THE SPACE GROUP OF μ-PHASE IN SUPERALLOY GH302——ELECTRON DIFFRACTION OF PRIMITIVE HEXAGONAL LATTICE μ-PHASE[J]. Acta Metall Sin, 1981, 17(4): 386-490.

摘要 参考文献 相关文章 Metrics 全文: PDF(1910 KB)   摘要: 在GH302合金的萃取μ相电子衍射花样中,(经X射线粉末衍射确定为μ相)出现了μ相空间群为(?)m的-h+k+l(?)3n禁止衍射。例如:[001]带轴中的{100},{200}等衍射斑点,以及{111}带轴中的{(?)},{(?)}等衍射斑点,这些禁止衍射斑点,不属于二次衍射,高级劳厄带或者其它物相(例如MgZn_2型Laves相)的衍射斑点。因此,根据衍射消光规律可以确定该物相为简单六方点阵,其晶胞参数与μ相((?)m)用六方点阵所描述的情况相符合。它可能是一种μ相局部有序结构。 Abstract：A study was made of the electron diffraction patterns of extracted μ-phase which identified with that of X-ray powder diffraction in superalloy GH302.It is shown that the reflections with—h+k+l≠3n spots, e.g. {100}, {200},etc.in [C01] zone and {110},{101}, etc. in [111] zone (indexed as hexagonal) are forbidden for the R3m space group. These "forbidden" diffractions cannot be attributed to double diffraction with neither non-zero Laue zone nor other phases such as MgZn_2 type Laves phase. Based on diffraction extinction law, it seems to be a primitive hexagonal lattice (P6). Its lattice constant is consistent with that of μ-phase (R3m) described as hexagonal. It may be a kind of local-ordering structure of μ-phase. 收稿日期: 1981-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 赵伯麟 苗柏和 陈国良 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1981/V17/I4/386 [1] Chen, G, L., Proceedings of the Fourth International Symposium on Superalloys, Ed. by Program Committee, Seven Springs International Symposium Committee, 1980, p. 323． [2] 内部资料. [3] Arnfelt, H. und Westgren, A., Strukturbericht, 3 (1937) , 364． [4] Forsyth, J. B. and Veiga, L. M. d' Alte Da, Acta Crystallogr., 15 (1962) , 543, [5] Raman, A., Z. Metallk., 57 (1966) , 301． [6] Sinha, A. K., Buckley, R. A. and Humc-Rothery, W., J. Iron Steel Inst., 205 (1967) , 191． [7] Sinha, A. K. and Hume-Rothery, W., ibid., 205 (1967) , 1145． [8] Pearson, W. B., A Handbook of Lattice Spacings and Structure of Metals, Vol. Ⅱ, Oxford Pergamon Press, 1967, p. 53． [9] Keown, S. R., Electron Microscopy 1964 Proc. of the Third European Regional Conference Held in Prague, Vol. A, 1965, p. 65． [10] Henry, N. F. M. and Lonsdale, K., International Tables for the X-Ray Crystallography, Vol Ⅰ, Kynoch, Birmingham, England, 1952, p. 273． [11] Sinha, A. K., Progress in Materials Science, Vol. 15, Part 2: Topologically Close-Packed Structures of Transition Metal Alloys, Ed. by B. Chalmers et al., Pergamon Press, London, 1972, p. 111． [12] Barrett, C, S. and Massalski, T. B., Structure of Metals, 3rd ed., McGraw-Hill, New York, 1966, p, 263． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed