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Structures,properties and responses to heat treatment of deformation processed Cu-15Cr composite powders prepared by mechanical milling

机译:机械研磨制备的变形加工Cu-15%Cr复合粉的结构,性能及热处理响应

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摘要

Cu-15%Cr composite powders were produced from elemental powders by mechanical milling technique. The structures, properties and thermal stability of the composite powders were characterized by scanning and transmission electron microscopy (SEM and TEM, respectively), electron probe microanalysis(EPMA), X-ray diffractometry and microhardness testing. The results show that powders are first flattened into thin discs at the initial stage of milling and then evolved into spheroid on further milling. Lamellar structure in powders is produced after intermediate milling. The Cr laminas degenerate into particles uniformizing in Cu matrix with excessive milling. The microhardness values and internal strain sharply increase with increasing milling time. Nano-sized Cu grains were found by TEM analysis. The microstructural observations suggested that the composite powders have high thermal stability and both spherodisation and thermal grooving contribute to the instability of Cr laminas.
机译:通过机械研磨技术由元素粉末生产Cu-15%Cr复合粉末。通过扫描电镜和透射电镜(分别为SEM和TEM),电子探针显微分析(EPMA),X射线衍射和显微硬度测试对复合粉末的结构,性能和热稳定性进行了表征。结果表明,粉末在研磨的初始阶段首先被弄平成薄片,然后在进一步研磨时演变成球状。粉末的层状结构是在中间研磨后产生的。过度研磨后,Cr层会退化为均匀分布在Cu基体中的颗粒。随着铣削时间的增加,显微硬度值和内部应变急剧增加。通过TEM分析发现了纳米尺寸的Cu晶粒。显微组织观察表明,复合粉末具有很高的热稳定性,而球化和热切槽均会导致Cr薄片的不稳定性。

著录项

  • 来源
    《中国有色金属学报(英文版)》 |2002年第005期|837-840|共4页
  • 作者单位

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

  • 收录信息 中国科学引文数据库(CSCD);
  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 TF123.7;
  • 关键词

    Cu-Cr alloy; deformation processed composite; mechanical milling;

    机译:铜铬合金;变形加工复合材料;机械铣削;
  • 入库时间 2022-08-19 03:34:36
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