The Investigation of Ultrahigh Pressuer Sintering of Cubic Boron Nitride with the Binding Agent of Si₃N₄

Abstract:

Selecting Si3N4 as binding agent and Al2O3–Al–Y2O3 as sintering additives, the sintered compact of polycrystalline cubic boron nitride (PcBN) was studied . By modifying the ratio of each component and the parameters of the sintering process, the compact sintered at 4.5 GPa and 1650 °C showed good mechanical properties.The phase constitution, microstructure of the sintered compact were characterized by XRD and SEM respectively. The degree of phase transformation of Si3N4 , the chemical reaction during the sintering process, and the sintering mechanism of the additives were discussed . The best relative density is more than 97 % , the flexural strength is more than 650 MPa, the Vickers hardness Hv is more than 8.7 GPa.

• Periodical: Advanced Materials Research (Volumes 150-151)
• Pages: 1191-1194
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.150-151.1191
• Online since: October 2010
• Authors: Shao Jie Lin, Yi Wu, Zheng Guang Zou, Yu Fang Shen
• Keywords: Binding Agent, Bonding Mechanism, Cubic Boron Nitride (CBN), Mechanical Property

References

[1] Donghui Wen: The mechanism and technology of hard turning with PcBN tool[D]. Dalian University of Teehnology, 2002. pp.12-14.

[2] R.H. Wentorf, R.C. DeVries, F.P. Bundy: Sintered superhard materials. Science, 208, (1980). pp.873-880.

DOI: 10.1126/science.208.4446.873

[3] A.Y. Mohamed, C. Kamel, Z. Nassereddine, B. Lakhdar, F.R. Jean: Hard machining of hardened bearing steel using cubic boron nitride tool. Journal of materials processing technology 209, (2009). pp.1092-1104.

DOI: 10.1016/j.jmatprotec.2008.03.014

[4] Yucheng Zhao, Mingzhi Wang: Effect of sintering temperature on the structure and properties of polycrystalline cubic boron nitride prepared by SPS. Journal of materials processing technology. 209, (2009). pp.355-359.

DOI: 10.1016/j.jmatprotec.2008.02.005

[5] Zhijie Lu: Development of high performance Si3N4/TiC nano composite ceramic tool materials and investigation of their properties[D]. Shandong University, 2005. pp.34-35.

[6] Yi zhong Zu , Jing-you TANG, Cui-xia TANG: Phase transition of α-Si3N4 under the condition of high pressure and high temperature. Journal of university of science and technology Beijing. 31, (2009) . pp.215-219.

[7] X.Z. Rong, T. Yano: TEM investigation of high-pressure reaction-sinered CBN-Al composites . Journal of Material Science, 39, (2004). pp.4705-4710.

DOI: 10.1023/b:jmsc.0000034176.85765.40

[8] Jianbin Zang: Investigation on SiC/Si3N4 bonded polycrystalline diamond/cubic boron nitride toughened with Y-ZrO2[D]. Yanshan University, 2002. pp.69-71.