Abstract
The effects of hBN content on microstructure, mechanical properties, and machinability of the pressureless-sintered Si3N4 ceramics were investigated. Flexural strength, Young’s modulus, and hardness decreased with increasing h-BN content. The mechanical properties are decreased mainly because of increased porosity of composite, and the much lower Young's modulus of BN
compared to that of Si3N4. Pressureless-sintered Si3N4/hBN composites exhibit strong texture of BN grains oriented with the c-axis parallel to the cold-pressing direction. Cutting resistance of Si3N4 ceramic composites with more than 10 vol% hBN decreased with increasing hBN content, demonstrating a good machinability of the composites. The residual pores can be attributed to improved machinability of pessureless-sintered Si3N4-BN composite.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference7 articles.
1. W. Ruigang, Pan Wei, Chen Jian, J. Mengning and F. Minghao: Materials Research Bulletin, Vol. 37 (2002) p.1269.
2. T. Kusunose, T. Sekino, Y. H. Choa and K. Niihara: J. Am. Ceram. Soc., Vol. 85 (2002), p.2689.
3. T. Kusunose, T. Sekino, Y. H. Choa and K. Niihara: J. Am. Ceram. Soc., Vol. 85 (2002), p.2678.
4. J. F. Shackerfold and W. Alexander: Materials Science and Engineering Handbook, 3 rd ed. ( CRC Press, New York, 2001).
5. R. Warren: Ceramic matrix composite (Chapman and Hall, New York, 1992).
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献
1. Ceramic Tool Materials for High Speed Cutting Process;12th INTERNATIONAL CERAMICS CONGRESS PART D;2010-10-27