期刊信息
  • 主管单位:
  • 上海市科学技术协会
  • 主办单位:
  • 上海有色金属学会
    上海理工大学
  • 名誉主编:
  • 陈兴章
  • 主    编:
  • 刘 平
  • 地    址:
  • 上海市军工路516号
  • 邮政编码:
  • 200093
  • 联系电话:
  • (86)021-55781550
  • 电子邮件:
  • nmme@usst.edu.cn
  • 国际标准刊号:
  • 2096-2983
  • 国内统一刊号:
  • 31-2125/TF
  • 单    价:
  • 8.00
  • 定    价:
  • 60.00
陈奇,贾雪冰,廖英杰,张柯.低压烧结制备石墨烯增强WC-Co硬质合金[J].有色金属材料与工程,2020,41(4):24-31.
低压烧结制备石墨烯增强WC-Co硬质合金
Graphene Reinforced WC-Co Cemented Carbide Prepared by Low Pressure Sintering
  
DOI:10.13258/j.cnki.nmme.2020.04.004
中文关键词:  石墨烯增强WC-Co复合材料  静电吸附  低压烧结  抗弯强度
英文关键词:graphene reinforced WC-Co composites  electrostatic adsorption  low-pressure sintering  bending strength
基金项目:国家重点研发计划资助项目(2017YFB0306405)
作者单位E-mail
陈奇 上海理工大学 材料科学与工程学院上海 200093  
贾雪冰 上海理工大学 材料科学与工程学院上海 200093  
廖英杰 上海理工大学 材料科学与工程学院上海 200093  
张柯 上海理工大学 材料科学与工程学院上海 200093 zhangke@usst.edu.cn 
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中文摘要:
      采用机械搅拌和静电吸附2种工艺制备氧化石墨烯增强WC-Co复合粉末,对复合粉末的微观形貌进行表征,并利用低压烧结工艺制备石墨烯增强WC-Co硬质合金,对硬质合金力学性能进行测试分析。静电吸附工艺和低压烧结相结合所制备的石墨烯增强WC-Co硬质合金抗弯强度和维氏硬度分别为3 250 MPa和1 846,比不添加石墨烯的WC-Co硬质合金抗弯强度和硬度分别提高了38.92%和7.93%;比机械搅拌工艺和低压烧结相结合所制备的石墨烯增强WC-Co硬质合金抗弯强度提高了8.33%,硬度略有提高。石墨烯通过静电吸附工艺均匀地分散在WC-Co基体中,高温烧结时通过阻碍晶界的扩散和位错的滑移来细化晶粒,有裂纹产生时会阻碍裂纹扩展,从而增强材料力学性能。
英文摘要:
      Graphene oxide reinforced WC-Co composite powders were prepared by mechanical stirring and electrostatic adsorption, respectively. The micro-morphology of the composite powders was characterized. Graphene reinforced WC-Co cemented carbide was prepared by low-pressure sintering process, and its mechanical properties were tested and analyzed. The bending strength and Vickers hardness of the graphene reinforced WC-Co cemented carbide were 3 250 MPa and 1 846 respectively, which were 38.92% and 7.93% higher than those of the WC-Co cemented carbide without graphene. The bending strength is increased by 8.33% than that of the graphene reinforced WC-Co cemented carbide prepared by the mechanical stirring process and low-pressure sintering, and the hardness is slightly increased. The graphene added by electrostatic adsorption process is uniformly dispersed in the WC-Co matrix. During high temperature sintering, the grains are refined by hindering the diffusion of grain boundaries and the slip of dislocations. When cracks are generated, the crack propagation is hindered, thereby enhancing the mechanical properties of the material.
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