COMPOSITE GROWTH IN HYPERMONOTECTIC ALLOYS

被引:7
作者
GRUGEL, RN
机构
[1] Department of Materials Science and Engineering, Center for Micro- gravity Research and Applications, Vanderbilt University, Nashville, 37235, TN
来源
METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY | 1991年 / 22卷 / 03期
关键词
D O I
10.1007/BF02651233
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The feasibility of solidifying uniformly aligned composites from alloys of hypermonotectic composition was investigated through the use of organic analogues and a directional solidification temperature gradient stage. Previously demonstrated macrostructurally detrimental effects due to coalescence and/or preferential wetting (or lack of) by the excess L(II) phase have been taken advantage of by the inclusion of constrained fibers aligned parallel to the growth direction. Upon passing through the miscibility gap, L(II) droplets are shown to attach and grow along the fibers prior to the monotectic reaction, resulting in a uniform composite. The results of different fiber materials in combination with "wetting" and "nonwetting" miscibility gap systems are presented and discussed in reference to processing in a microgravity environment.
引用
收藏
页码:339 / 348
页数:10
相关论文
共 98 条
  • [1] AHLBORN A, 1984, MATERIALS SCI MICROG, P55
  • [2] SEPARATION OF IMMISCIBLE MELTS UNDER REDUCED GRAVITY
    AHLBORN, H
    LOHBERG, K
    [J]. NATURWISSENSCHAFTEN, 1986, 73 (07) : 378 - 380
  • [3] AHLBORN H, 1976, MATERIALS SCI SPACE, P309
  • [4] AHLBORN H, 1987, SCI RESULTS GERMAN S, P297
  • [5] INFLUENCE OF GRAVITY LEVEL AND INTERFACIAL ENERGIES ON DISPERSION-FORMING TENDENCIES IN HYPERMONOTECTIC CU-PB-AL ALLOYS
    ANDREWS, JB
    SANDLIN, AC
    CURRERI, PA
    [J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1988, 19 (11): : 2645 - 2650
  • [6] ANDREWS JB, 1989, ESA SP295, P121
  • [7] ANG CY, 1977, NASA TMX58173
  • [8] ANGERS LM, 1982, 4 P C INS COMP NEW Y, P205
  • [9] Bergman A., 1982, Materials Processing in the Reduced Gravity Environment of Space. Proceedings of the Materials Research Society Annual Meeting, P563
  • [10] Bergman A., 1982, Materials Processing in the Reduced Gravity Environment of Space. Proceedings of the Materials Research Society Annual Meeting, P579