Abstract High temperature stabilization of a nanostructured Cu-Y_2O_3 composite through microalloying with Ti
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High temperature stabilization of a nanostructured Cu-Y_2O_3 composite through microalloying with Ti

机译:钛微合金化纳米结构Cu-Y_2O_3复合材料的高温稳定性

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摘要

AbstractThe effects of minor additions (0.2, 0.4 and 0.8wt%) of Ti on the thermal stability of both Cu nanograins and Y2O3particles in nanostructured Cu-5vol%Y2O3composite powder particles were investigated via 1h isochronal annealing at temperatures ranging from 300 to 1000°C. It was found that a small amount addition of 0.4wt%Ti effectively inhibits the coarsening of the Y2O3particles during annealing at a very high homologous temperature of 0.87Tm, where Tmis the melting point of Cu, which, in turn, stabilizes Cu nanograins and retains the hardness value of the as-milled powder sample. However, this is in clear contrast with the significant decrease in hardness of the Ti-free and 0.2wt%Ti doped milled powder samples annealed at the same condition, resulting from the coarsening of the Y2O3particles and growth of Cu nanograins. The energy dispersive X-ray spectrometry elemental analysis shows that the stabilizing mechanisms responsible for the improved thermal stability of the Y2O3particles are associated with the chemical reactions between Ti, O and Y2O3.
机译: 摘要 微量添加Ti(0.2、0.4和0.8wt%)对Cu纳米晶粒和Y 2 O 3 粒子 2 O 3 复合粉末颗粒。发现少量添加0.4wt%Ti有效抑制了Y 2 O 3 < / ce:inf>颗粒在非常高的同源温度0.87T m 退火期间,其中T m 是Cu的熔点,其又使Cu纳米颗粒稳定并保持研磨后的粉末样品的硬度值。但是,这与在相同条件下退火的无Ti和0.2wt%Ti掺杂的研磨粉末样品的硬度显着降低形成明显的对比,这是由于Y O 3 颗粒和铜纳米颗粒的生长。能量色散X射线光谱仪的元素分析表明,稳定机制负责改善Y 2 O 3 颗粒与Ti,O和Y之间的化学反应有关 2 O 3

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  • 来源
    《Materials Science and Engineering》 |2018年第17期|80-87|共8页
  • 作者单位

    Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University,Institute of Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University;

    Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University,Institute of Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University;

    State Key Laboratory for Metal Matrix Materials, School of Materials Science and Engineering, Shanghai Jiao Tong University;

    State Key Laboratory for Metal Matrix Materials, School of Materials Science and Engineering, Shanghai Jiao Tong University;

    Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University;

    Electron Microscopy Unit, The University of New South Wales;

    School of Materials Science and Engineering, The University of New South Wales;

    Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology;

    Department of Mechanical and Aerospace Engineering, University of Central Florida;

    Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University,Institute of Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Oxide dispersion-strengthened Cu; Nanocrystalline metal matrix composite; Thermal stability; Ti addition; Microalloying; Hall-Petch relation;

    机译:氧化物弥散强化铜;纳米晶金属基复合材料;热稳定性;钛添加;微合金化;霍尔-Petch关系;

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