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WC/Co composite surface structure and nano graphite precipitate induced by high current pulsed electron beam irradiation

机译：大电流脉冲电子束辐照诱导WC / Co复合材料表面结构和纳米石墨沉淀

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摘要

High current pulsed electron beam (HCPEB) irradiation was conducted on a WC-6% Co hard alloy with accelerating voltage of 27 kV and pulse duration of 2.5 μs. The surface phase structure was examined by using glancing-angle X-ray diffraction (GAXRD), scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM) methods. The surface tribological properties were measured. It was found that after 20 pulses of HCPEB irradiation, the surface structure of WC/Co hard alloy was modified dramatically and composed of a mixture of nano-grained WC_(1-x), Co_3W_9C_4, Co_3W_3C phases and graphite precipitate domains ～50 nm. The friction coefficient of modified surface decreased to ～0.38 from 0.6 of the initial state, and the wear rate reduced from 8.4 × 10~(-5) mm~3/min to 6.3 × 10~(-6) mm~3/min, showing a significant self-lubricating effect.
机译：在WC-6％Co硬质合金上以27 kV的加速电压和2.5μs的脉冲持续时间进行高电流脉冲电子束（HCPEB）辐照。通过使用掠角X射线衍射（GAXRD），扫描电子显微镜（SEM）和高分辨率透射电子显微镜（HRTEM）方法检查表面相结构。测量了表面摩擦学性能。结果发现，经20次HCPEB辐照后，WC / Co硬质合金的表面结构发生了显着变化，并由纳米晶粒WC_（1-x），Co_3W_9C_4，Co_3W_3C相和石墨沉淀域的混合物组成，其混合区约为50 nm。 。改性表面的摩擦系数从初始状态的0.6降低到〜0.38，磨损率从8.4×10〜（-5）mm〜3 / min降低到6.3×10〜（-6）mm〜3 / min ，显示出显着的自润滑作用。

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  • 来源
    《Applied Surface Science》 |2013年第ptab期|552-556|共5页
  • 作者

    S.Z. Hao; Y. Zhang; Y. Xu; N. Gey; T. Grosdidier; C. Dong;

  • 作者单位

    Key Laboratory of Materials Modification &School of Physics and Optoelectronics Engineering, Dalian University of Technology, Dalian 116024, China;

    Key Laboratory of Materials Modification &School of Physics and Optoelectronics Engineering, Dalian University of Technology, Dalian 116024, China,School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;

    Key Laboratory of Materials Modification &School of Physics and Optoelectronics Engineering, Dalian University of Technology, Dalian 116024, China,College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China;

    Universite de Lorraine, Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux (LEM3), CNRS UMR 7239, Ile du Saulcy, 57045 Metz, France,Universite de Lorraine, Laboratoire d'Excellence on Design of Alloy Metals for Low-Mass Structure (DAMAS), He du Saulcy, 57045 Metz, France;

    Universite de Lorraine, Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux (LEM3), CNRS UMR 7239, Ile du Saulcy, 57045 Metz, France,Universite de Lorraine, Laboratoire d'Excellence on Design of Alloy Metals for Low-Mass Structure (DAMAS), He du Saulcy, 57045 Metz, France;

    Key Laboratory of Materials Modification &School of Physics and Optoelectronics Engineering, Dalian University of Technology, Dalian 116024, China,Universite de Lorraine, Laboratoire d'Excellence on Design of Alloy Metals for Low-Mass Structure (DAMAS), He du Saulcy, 57045 Metz, France;

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  • 正文语种 eng
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  • 关键词

    High current pulsed electron beam; Surface modification; WC/Co hard alloy; Nanostructure; Tribological property;

    机译：大电流脉冲电子束;表面改性;WC / Co硬质合金;纳米结构摩擦学性质;

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