耐火材料 ›› 2024, Vol. 58 ›› Issue (3): 195-198.DOI: 10.3969/j.issn.1001-1935.2024.03.003

• 研究开发 • 上一篇    下一篇

Y2O3对氧化物结合Ti(C,N)复合材料性能的影响

程旭1), 邓承继1), 董博1), 邹起良1), 丁军1), 王周福1), 朱万政2), 肖语嫣1), 祝洪喜1), 余超1)   

  1. 1)武汉科技大学 省部共建耐火材料与冶金国家重点实验室 湖北武汉 430081
    2)天津炜润达新材料科技有限公司 天津 301800
  • 收稿日期:2023-10-27 出版日期:2024-06-15 发布日期:2024-06-21
  • 通讯作者: 余超,男,1986年生,博士,副教授。 E-mail:chaoyu@wust.edu.cn
  • 作者简介:程旭:男,1998年生,博士研究生。 E-mail:xucheng@wust.edu.cn
  • 基金资助:
    湖北省重点研发计划(2023BAB106);国家自然科学基金联合基金项目(U21A2057)。

Effect of Y2O3 on properties of oxide-bonded Ti(C,N) composites

Cheng Xu, Deng Chengji, Dong Bo, Zou Qiliang, Ding Jun, Wang Zhoufu, Zhu Wanzheng, Xiao Yuyan, Zhu Hongxi, Yu Chao   

  1. First author's address: The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Received:2023-10-27 Online:2024-06-15 Published:2024-06-21

摘要: 为探究稀土氧化物对Ti(C,N)复合材料性能的影响,以TiO2粉、石墨粉和Si粉为原料,Y2O3粉为烧结助剂,采用碳热还原氮化法经1 600 ℃高温烧成制备氧化物结合Ti(C,N)材料。研究Y2O3添加量(加入质量分数分别为1%、2%、4%)对Ti(C,N)复合材料物相组成、显微形貌及物理性能的影响。结果表明,高温烧后试样的主物相均为Ti(C,N)、Ti3O5、α-石英及Y2Si2O7。随Y2O3添加量的增大,试样中液相生成量增多,使Ti(C,N)晶粒粗化,Y2Si2O7物相分布不均匀,试样的力学性能受损。当Y2O3添加量(w)为1%时,Ti(C,N)晶粒的平均尺寸约为0.76 μm,复合材料具有较高致密度及优异的力学性能,其显气孔率、常温抗折强度和弹性模量分别为0.8%、242.2 MPa和230.3 GPa。

关键词: Y2O3, Ti(C,N), 碳热还原氮化法, 常温抗折强度, 晶粒尺寸

Abstract: To investigate the effect of rare earth oxides on the properties of Ti(C,N) composites,oxide-bonded Ti(C,N) materials were prepared by carbothermal reduction nitridation at 1 600 ℃ using TiO2 powder,graphite powder and Si powder as raw materials,and Y2O3 powder as sintering aids.The effect of the Y2O3 addition (1%,2%,and 4%,by mass) on the phase composition,microstructure,and physical properties of the Ti(C,N) composites was investigated.The results show that the primary phases in the samples after high-temperature firing are Ti(C,N),Ti3O5,α-quartz,and Y2Si2O7.As the Y2O3 addition increases,there is a corresponding rise in the production of the liquid phase within the specimens,resulting in coarsening of Ti(C,N) grains and non-uniform distribution of Y2Si2O7,ultimately leading to a degradation in the mechanical properties of the specimens.When the Y2O3 addition is 1%,the average size of Ti(C,N) grains is approximately 0.76 μm,the composite exhibits high density and excellent mechanical properties,with the apparent porosity of 0.8%,cold modulus of rupture of 242.2 MPa,and elastic modulus of 230.3 GPa.

Key words: yttria, Ti(C,N), carbothermal reduction nitridation, cold modulus of rupture, grain size

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