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首页> 外文期刊>Materials Science and Engineering >Fabricating fine-grained tungsten heavy alloy by spark plasma sintering of low-energy ball-milled W-2Mo-7Ni-3Fe powders
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Fabricating fine-grained tungsten heavy alloy by spark plasma sintering of low-energy ball-milled W-2Mo-7Ni-3Fe powders

机译：低能球磨W-2Mo-7Ni-3Fe粉末的火花等离子体烧结制备细晶钨重合金

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摘要

Fine-grained W-2Mo-7Ni-3Fe heavy alloys were fabricated by low-energy ball milling (LEBM)-assisted spark plasma sintering at a temperature range of 1000-1250 ℃. The effects of sintering temperature on the phase evolution, microstructural characteristics, and mechanical properties of the alloys were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), hardness testing, and universal testing. The XRD results show that small intermetallic compounds, such as NiW and Ni_2W_4C, form in the alloys. The W-2Mo-7Ni-3Fe alloys are characterized by white W grains, a gray W-rich microstructure that contains Mo, and a black γ-(Ni, Fe, W, Mo) binding phase. The X-ray energy dispersive analysis (EDS) shows that the Mo, Ni, and Fe that form a solid solution with W in the gray structure gradually decrease with increasing temperature. The hardness and bending strength of the alloys initially increase and then decrease with rising sintering temperature. Moreover, the alloys sintered at different temperatures exhibit dissimilar bending fracture modes.
机译：通过低能球磨（LEBM）辅助火花等离子体烧结在1000-1250℃的温度范围内制备了细晶粒的W-2Mo-7Ni-3Fe重合金。通过X射线衍射（XRD），扫描电子显微镜（SEM），硬度测试和通用测试研究了烧结温度对合金的相变，显微组织和力学性能的影响。 XRD结果表明，合金中形成了小的金属间化合物，例如NiW和Ni_2W_4C。 W-2Mo-7Ni-3Fe合金的特征在于白色的W晶粒，灰色的富含W的微观结构（包含Mo）和黑色的γ-（Ni，Fe，W，Mo）结合相。 X射线能量色散分析（EDS）表明，与W形成灰色结构的固溶体的Mo，Ni和Fe随着温度的升高而逐渐降低。合金的硬度和弯曲强度首先随着烧结温度的升高而增加，然后降低。而且，在不同温度下烧结的合金表现出不同的弯曲断裂模式。

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  • 来源
    《Materials Science and Engineering》 |2013年第20期|18-23|共6页
  • 作者

    D.P. Xiang; L. Ding; Y.Y. Li; X.Y. Chen; T.M. Zhang;

  • 作者单位

    Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, Hainan University, Haikou 570228, China ,School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;

    Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, Hainan University, Haikou 570228, China;

    School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;

    Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, Hainan University, Haikou 570228, China;

    Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, Hainan University, Haikou 570228, China;

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  • 正文语种 eng
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  • 关键词

    W-Mo-Ni-Fe alloy; Low-energy ball milling (LEBM); Spark plasma sintering (SPS); Energy dispersive analysis; Bending strength; Fracture morphology;

    机译：W-Mo-Ni-Fe合金;低能球磨（LEBM）;火花等离子体烧结（SPS）;能量色散分析;弯曲强度;断裂形态;

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