东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (1): 56-59.DOI: -

• 论著 • 上一篇    下一篇

B_4C陶瓷材料的无压烧结与性能

岳新艳;应伟峰;喻亮;茹红强;   

  1. 东北大学材料各向异性与织构教育部重点实验室;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-01-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50372010,50902018);;

Properties of B4C ceramics prepared by pressureless sintering

Yue, Xin-Yan (1); Ying, Wei-Feng (1); Yu, Liang (1); Ru, Hong-Qiang (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-01-15 Published:2013-06-20
  • Contact: Yue, X.-Y.
  • About author:-
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摘要： 以碳化硼微粉作为原料,选用SiC和C为烧结助剂,研究了SiC和C对无压烧结B4C材料的体积密度、硬度、抗折强度和断裂韧性等性能的影响.结果表明,最佳烧结温度为1975℃,保温时间是30min.SiC和C的质量分数对材料密度、硬度和抗折强度的影响都是先增大后减小.烧结助剂SiC和C的最佳添加量分别为6%和5%(质量分数)时,得到相应的无压烧结B4C陶瓷材料的最佳力学性能:体积密度为2.45g/cm3,维氏硬度为35GPa,抗折强度为240MPa,断裂韧性为3.0MPa.m1/2

关键词: B4C, 无压烧结, SiC, C, 烧结助剂, 力学性能

Abstract: The effect of SiC and C sintering aids on the mechanical properties of B4C ceramics prepared by pressureless sintering was investigated. Micro-powder B4C, SiC and C were used as starting materials. The results showed that the optimum sintering process is at 1975°C holding for 30min. The density, hardness and flexural strength all increase first then decrease with increasing SiC and C contents of which the optimal amount is 6% and 5%, respectively. The optimum bulk density, hardness, flexural strength and fracture toughness are 2.45g/cm3, 35GPa, 240MPa and 3.0MPa·m1/2, respectively.

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