Thermal Shock Resistance and Ablation Behavior of TiB2-Cu-Ni Composite via Combustion Synthesis

Abstract:

Article Preview

TiB2-Cu-Ni cermet composite was fabricated by self-propagating high-temperature synthesis combined with Pseudo Hot Isostatic Pressing. The microstructure of the composite is fine and uniform. The thermal shock resistance and ablation behavior of the TiB2-Cu-Ni composite was investigated by heating it for twenty seconds using a plasma torch arc heater. Fatal breakup took place in the monolithic TiB2 ceramic once the plasma arc flow faced the surface of the ceramic. Only a small crack was found on the ablation surface of the TiB2-Cu-Ni composite. The thermal stress fracture resistance parameter, R, and the critical energy release rate GIC of TiB2-Cu-Ni composite are at the same order with that of the W/Cu alloy. It showed that the properties of thermal shock resistance and the ablation of the composite are good. The fraction of mass loss of the homogeneous composite was 2.32 %, which was similar to that of traditional W/Cu alloy. The volatilization of the metal binder and mechanical erosion was the main mechanisms of the ablation.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1513-1516

DOI:

10.4028/www.scientific.net/KEM.336-338.1513

Citation:

Z. Yong et al., "Thermal Shock Resistance and Ablation Behavior of TiB2-Cu-Ni Composite via Combustion Synthesis", Key Engineering Materials, Vols. 336-338, pp. 1513-1516, 2007

Online since:

April 2007

Export:

Price:

$35.00

[1] L. Lu, M.O. Lai and H.Y. Wang: J. Mater. Sci. Vol. 35 (2000), p.241.

[2] S.C. Tjong, K.C. Lau: Comp. Sci. Technol. Vol. 59 (1999), pp. (2005).

[3] L.S. Sigl, K.A. Schwetz: Powd. Metall. Int. Vol. 23 (1991), p.221.

[4] J.M. S�nchez, I. Azcona, F. Castro: J. Mater. Sci. Vol. 35 (2000), p.9.

[5] Z.Y. Ma, S.C. Tjong: Mater. Sci. Eng. A Vol. 284 (2000), pp. l70.

[6] P. Yih, D.D.L. Chung: J. Mater. Sci. Vol. 32 (1997), p.1703.

[7] X.H. Zhang, C.C. Zhu, W. Qu, et al.: Comp. Sci. Technol. Vol. 62 (2002), pp. (2037).

[8] M.A. Meyers, E.A. Olevsky: Mater. Sci. Eng. A Vol. 311 (2001), p.83.

[9] W.D. Kingery: J. Am. Ceram. Soc. Vol. 38 (1955), p.3.

[10] Q. Yu: Materials Techniques (Aerospace Press, Beijing, 1991), p.7. (a) (b) (c) (d).

In order to see related information, you need to Login.