Acta Metallurgica Sinica (English Letters) ›› 2012, Vol. 25 ›› Issue (1): 40-46.DOI: 10.11890/1006-7191-121-40

• 研究论文 • 上一篇    下一篇

Novel hard materials with controlled (W0.5Al0.5)C grain shapes: in-situ high pressure preparation and mechanical properties

Zhuhui Qiao1,Zhuhui Qiao2   

  1. 1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
    2. CAS Key Laboratory of Rare Earth on Advanced Materials and Valuable Utilization of Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
  • 收稿日期:2011-06-22 修回日期:2011-09-28 出版日期:2012-02-25 发布日期:2012-02-16
  • 通讯作者: Zhuhui Qiao

Novel hard materials with controlled (W0.5Al0.5)C grain shapes: in-situ high pressure preparation and mechanical properties

Zhuhui QIAO1,2,Xianfeng MA2, Huaguo TANG2, Wei ZHAO2,Jianwei LIU2   

  1. 1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy
    2. CAS Key Laboratory of Rare Earth on Advanced Materials and Valuable Utilization of Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022,China
  • Received:2011-06-22 Revised:2011-09-28 Online:2012-02-25 Published:2012-02-16
  • Contact: Zhuhui QIAO

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摘要： A novel hard material with various non-equilibrium (W0.5Al0.5)C grain shapes was successfully prepared through mechanical alloying and in-situ high-pressure sintering process. X-ray diffraction, scanning electron microscopy were used to characterize the phase and the microstructures of the samples. The novel hard materials with “fibrous”, “rounded” and “plate-like” grains shape do not contain sharp edges that can greatly improve the mechanical properties of the hard material. The bulk binderless (W0.5Al0.5)C hard material with various (W0.5Al0.5)C grain shapes possess good mechanical properties and light weight. The formation mechanism for the non-equilibrium (W0.5Al0.5)C grains during in-situ high-pressure sintering is also discussed.

Abstract: A novel hard material with various (W0.5Al0.5)C grain shapes was successfully prepared through mechanical alloying and in-situ high-pressure sintering process. X-ray diffraction apparatus and scanning electron microscopy were used to characterize the phase and the microstructures of the samples. The novel hard materials with ``fibrous", ``rounded" and ``plate-like" grains, which do not contain sharp edges, have the improved mechanical properties. The bulk boundless (W0.5Al0.5)C hard material with various (W0.5Al0.5)C grain shapes possesses good mechanical properties and light weight. The formation mechanism for the non-equilibrium (W0.5Al0.5)C grains during in-situ high-pressure sintering is also discussed.

Key words: Novel hard material, Controlled (W0.5Al0.5)C grain, In-situ high-pressure sintering, Grain growth mechanism