In Situ Combustion Synthesis of h-BN-SiC High-Temperature Ceramics

Abstract:

Article Preview

The feasibility of fabricating h-BN-SiC high-temperature ceramics by in-situ combustion synthesis was demonstrated by igniting the mixture of boron carbide and silicon powder under 100MPa nitrogen pressure. The reaction thermodynamics and the adiabatic combustion temperature were calculated theoretically. The phase composition, microstructure and mechanical properties of composite were identified by XRD and SEM. The maximum bending strength and fracture toughness of the composite were 65.2 MPa and 1.4 MPa·m1/2 under room temperature, respectively. The effects of h-BN and SiC dilution contents on the mechanical properties of composite were also discussed.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

1501-1504

Citation:

H. B. Li et al., "In Situ Combustion Synthesis of h-BN-SiC High-Temperature Ceramics", Key Engineering Materials, Vols. 353-358, pp. 1501-1504, 2007

Online since:

September 2007

Export:

Price:

$38.00

[1] Y.M. Zhang, X.D. He, J.C. Han and S.Y. Du: Journal of Materials Processing Technology Vol. 116 (2001), p.161.

[2] G.J. Zhang, Y. Beppu, T. Ohji and S. Kanzaki: Acta Mater. Vol. 49 (2001), p.77.

[3] R. Ruh, A. Zangvil, R.R. Wills: Advanced Ceramic Materials Vol. 3 (1988), p.411.

[4] J.J. Moore, H.J. Feng: Prog. Mater. Sci. Vol. 39 (1995), p.243.

[5] A.G. Merzhanov: Int. J. Self-Propag. High-Temp. Synth. Vol. 2 (1993), p.113.

[6] J.J. Moore, H.J. Feng: Prog. Mater. Sci. Vol. 39 (1995), p.275.

[7] Kashinath C Patil, Singanahally T Aruna and Sambandan Ekambaram: Solid State & Materials Science Vol. 2 (1997), p.156.

[8] N. P. Novikov, L.P. Borovinskaya, and A.G. Merzhanov: Combustion Processes in Chemical Technology and Metallurgy (Akad Nauk SSSR, Chernogolovka 1975).

[9] Yinjiao L, Yinchang C.: Notebook of thermodynamic data of inorganic (East-north University Press, Shenyang 1996). Fig. 5 Mechanical properties of combustion products.

10 20 30 40.

[40] [50] [60] [70] [80] Bending Strength Fracture Toughness Dilution Contens of SiC (wt%) Bending Strength (MPa) 1. 0 1. 5 2. 0 2. 5 Fracture Toughness (MPa. m1/2).

10 20 30 40.

[30] [40] [50] [60] [70] Bending Strength Fracture Toughness Dilution Contens of h-BN (wt%) Bending Strength (MPa) 0. 5 1. 0 1. 5 2. 0 Fracture Toughness (MPa. m1/2 ).

Fetching data from Crossref.
This may take some time to load.