Study on the Reaction Mechanism of Al-ZrO2-B4C System

Abstract:

Article Preview

The composite (a-Al2O3+ZrC+ZrB2)/Al has been fabricated by using exothermic dispersion synthesis. When the reinforcement volume fraction is 100%, there are two exothermic peaks occurred in DSC curve of the Al-ZrO2 system. But when the reinforcement volume fraction is 30%, there is only one exothermic peak occurred in the DSC curve and the height of it decreases. When the molar ratio of B4C/ZrO2 is 0, the reaction products are consisted of a-Al2O3 grains and Al3Zr blocks. With an increase in the molar ratio of B4C/ZrO2, the amount of the Al3Zr decreases and the phases of ZrB2 and ZrC are formed. When the molar ratio of B4C/ZrO2 increases to 1/3, the Al3Zr almost disappear and the reinforcements of the composites are composed of a-Al2O3, ZrC and ZrB2. The corresponding XRD (X-ray diffraction) patterns also testify this.

Info:

Periodical:

Materials Science Forum (Volumes 675-677)

Edited by:

Yi Tan and Dongying Ju

Pages:

839-842

DOI:

10.4028/www.scientific.net/MSF.675-677.839

Citation:

H. G. Zhu et al., "Study on the Reaction Mechanism of Al-ZrO2-B4C System", Materials Science Forum, Vols. 675-677, pp. 839-842, 2011

Online since:

February 2011

Export:

Price:

$35.00

[1] M.S. Song, M.X. Zhang, S.G. Zhang, B. Huang, J.G. Li: Materials Science and Engineering A Vol. 473(2008), p.166.

[2] M.S. Song, B. Huang, M.X. Zhang, J.G. Li: J Crystal Growth 310(2008), p.4290.

[3] S.C. Tjong, Z.Y. Ma: Materials Science and Engineering R: Reports 29(2000), p.49.

[4] H.G. Zhu, J. Min, Y.L. Ai and Q Wu: Advanced Material Research Vol. 97-101(2010), p.1624.

[5] O. Knacke: Thermochemical properties of inorganic substances. Berlin, Springer-Verlag, p. (1991).

[6] D.R. Ye: Hand Book of Thermodynamical Data for Inorganic Substance (in Chinese) (Metallurgy Industry Press, Beijing 1987) 4.

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