华南理工大学学报(自然科学版) ›› 2014, Vol. 42 ›› Issue (10): 14-19.doi: 10.3969/j.issn.1000-565X.2014.10.003

• 材料科学与技术 • 上一篇    下一篇

烧结温度对陶瓷基复合材料界面和性能的影响

刘泓1 刘仲武1 尹育航2   

  1. 1.华南理工大学 材料科学与工程学院,广东 广州 510000;2.广东奔朗新材料股份有限公司,广东 佛山 528313
  • 收稿日期:2013-12-16 修回日期:2014-06-20 出版日期:2014-10-25 发布日期:2014-10-01
  • 通信作者: 刘泓(1978-),男,博士,工程师,主要从事精密磨削工具的研究. E-mail:liuhongphd@163.com
  • 作者简介:刘泓(1978-),男,博士,工程师,主要从事精密磨削工具的研究.
  • 基金资助:

    广东省自然科学基金资助项目(S2013040015492)

Interfaces and Performance of Ceramic Matrix Composites at Different Sintering Temperatures

Liu Hong1  Liu Zhong-wu1  Yin Yu-hang2   

  1. 1.School of Materials Science and Engineering,South China University of Technology,510000,Guangdong,China; 2.Monte-Bianco Diamond Applications Co.,Ltd,528313,Guangdong,China
  • Received:2013-12-16 Revised:2014-06-20 Online:2014-10-25 Published:2014-10-01
  • Contact: 刘泓(1978-),男,博士,工程师,主要从事精密磨削工具的研究. E-mail:liuhongphd@163.com
  • About author:刘泓(1978-),男,博士,工程师,主要从事精密磨削工具的研究.
  • Supported by:

    广东省自然科学基金资助项目(S2013040015492)

摘要: 制备了轴承内圆精密磨削用陶瓷基立方氮化硼(cBN)复合材料.利用扫描电子显微镜和电子探针研究了复合材料的微观组织结构、界面成分分布,并用轴承内圆磨床测试了磨削性能.结果表明:随着烧结温度升高,复合材料界面成分扩散深度缓慢增加,烧结温度从700℃升高到800℃,扩散层厚度从大约3μm增加到6μm左右;界面强度增加速度大于陶瓷基体材料强度增加速度;当烧结温度为750℃时,复合材料界面结合强度与陶瓷基体材料强度相匹配,磨削时复合材料进给量达到8μm/转,磨耗体积比达到310~370,具有良好的锋利度和耐磨性能,磨削后的复合材料能观察到cBN磨损、破裂、脱落和陶瓷基材桥断裂的痕迹.

关键词: 陶瓷基复合材料, 立方氮化硼, 烧结温度, 界面, 磨削性能

Abstract:

A kind of ceramic matrix cubic boron nitride (cBN) composites for bearing interfacial precision grinding was prepared by sintering process. The microstructure and element distribution at the interfaces were studied by scanning electron microscope and electron probe analysis. The grinding properties were tested by bearing interfacial grinder. The results show that with the increase of sintering temperature, the composition diffusion depth at the interfaces increases slowly, and the interfacial binding strength increases more rapidly than the strength of ceramic matrix. At the sintering temperature of 750 ℃, interfacial binding strength of composites matches well with the matrix strength. With the feed rate is 8 μm/r and the abrasion volume ratio is 310-370, the ceramic matrix cBN composites show good grinding performance with high sharpness and wear resistance. The wear, rupture, exfoliation of cBN and the fracture of ceramic matrix material were observed after grinding.

Key words: ceramic matrix composite, cubic boron nitride, sintered temperature, interfacial, grinding performance

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