Preparation and Properties of Spark Plasma Sintered AlN/BN Nano-Composites


Article Preview

Nano-sized turbostritic-BN (t-BN) was fabricated through chemical process using boric acid and urea in this work. By the same method, the AlN powders coated with nano-BN were prepared too. The results of X-ray diffraction (XRD) and transmission electron microscope (TEM) revealed that nano-sized t-BN was synthesized at about 600°C in nitrogen gas and it surrounded the surface of AlN particles. High-density AlN/BN nano-composites were fabricated spark plasma sintering (SPS). Microstructure and properties of AlN/BN nano-composites (5~30vol% BN) were investigated. The h-BN flake particles were homogenously dispersed at AlN grain boundaries and within grains in the AlN/BN composites. A little nano-BN additions significantly improved the bending strength of the nano-composites. However, the bending strength was decreased with the BN content increasing. The thermal conductivity of AlN/BN nano-composites was investigated too.



Edited by:

Katsutoshi Komeya, Yohtaro Matsuo and Takashi Goto




M. J. Li et al., "Preparation and Properties of Spark Plasma Sintered AlN/BN Nano-Composites", Key Engineering Materials, Vol. 352, pp. 197-200, 2007

Online since:

August 2007




[1] K.S. Mazdiyasni, R. Ruh and E. E Hermes: Am. Ceram. Soc. Bull. Vol. 64(1985), No. 80, p.1149.

[2] S. Du, Z. Liu, L.Q. Gao, F. Li and L.T. Li: Am. Ceram. Soc Bull. Vol. 76(1997), No. 12, p.69.

[3] W.S. Cho, Y.H. Lee, M.W. Cho, et al: Key Engineering Materials, Vol. 264-268(2004), p.873.

[4] Y. Lee, Y. Kim: Journal of the Korean Ceramic Society Vol. 40(2003), p.229.

[5] W. Sinclair, H. Simmons: J. Mater. Sci. Lett. Vol. 6(1987), p.627.

[6] T.D. Xiao, K.E. Gonsalves, P.R. Strutt. J. Am. Ceram. Soc. Vol. 76(1993), No. 12, p.69.

[7] F. Thévenot, C. Doche, H. Mongeot, et al: J. Europ. Ceram. Soc. Vol. 17(1997), p. (1911).

[8] X.D. Wang, G.J. Qiao, Z.H. Jin. Materials letter Vol. 58(2004), p.1419.

[9] T. Kusunose, T. Sekino, B. S. Kim, et al: Materials Science Forum Vol. 439(2003), p.131.

[10] D.M. Zhang, Z.Y. Fu: Journal of Wuhan University of Technology, Vol. 21(1999), No. 6, p.15.

[11] H.L. Tan, W. Yang. Mech. Mater. Vol. 30(1998), p.111.