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Effect of mechanical alloying on structure and property of Ni3Al by spark plasma sintering

机译:机械合金化对火花等离子体烧结Ni3Al组织和性能的影响

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摘要

Ni3Al intermetallics have been successfully made from mechanically alloyed powder with nominal compositions Ni75Al25 (at.%) by spark plasma sintering (SPS). The effect of mechanical alloying on the microstructure of elemental powder and the properties of as-sintered alloy has been investigated by X-ray diffraction (XRD), scan electronic microscopy (SEM), density measurement and bending test. The results show that the mechanical alloying (MA) refines the grain of particles. It suggests that during subsequent sintering processes the high energy powder enhanced by MA needs lower sintering temperature than mixture powder to gain single phase Ni3Al compacts. Under the same sintering conditions, density and strength of Ni3Al compacts increase with milling time initially and then began to decrease with prolong of milling time under the interaction of grain refinement and more defects involved by MA. Sintering temperature has significant influence on the purity of Ni3Al in the compacts fabricated by reaction synthesis.
机译:Ni3Al金属间化合物已通过火花等离子烧结(SPS)成功地由具有标称成分Ni75Al25(at。%)的机械合金粉末制成。通过X射线衍射(XRD),扫描电子显微镜(SEM),密度测量和弯曲试验研究了机械合金化对元素粉末组织和烧结态合金性能的影响。结果表明,机械合金化(MA)使颗粒细化。这表明在随后的烧结过程中,由MA增强的高能粉末需要比混合粉末更低的烧结温度,以获得单相Ni3Al压块。在相同的烧结条件下,Ni3Al压坯的密度和强度起初随铣削时间的增加而增加,然后在晶粒细化和MA参与更多缺陷的相互作用下,随着铣削时间的延长而开始降低。烧结温度对通过反应合成制备的成型体中的Ni3Al的纯度有重要影响。

著录项

  • 来源
    《Progress in Palliative Care》 |2008年第3期|p.227-230|共4页
  • 作者

    Meng J.; Jia C.C.; He Q.;

  • 作者单位

    School of Materials Science and Engineering, University of Science andTechnology Beijing, Beijing 100083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    NI3AL INTERMETALLICS; MECHANICAL ALLOYING; SPARK PLASMA SINTERING;

    机译:NI3AL INTERMETALLICS;机械合金化;火花等离子体烧结;
  • 入库时间 2022-08-18 00:25:38

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