On the infiltration behavior of Al, Al-Li, and Mg meltas through SiCp bed

Murty, B. S. ; Thakur, S. K. ; Dhindaw, B. K. (2000) On the infiltration behavior of Al, Al-Li, and Mg meltas through SiCp bed Metallurgical and Materials Transactions A, 31A (1). pp. 319-325. ISSN 1073-5623

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Official URL: http://www.springerlink.com/content/5u3812160p37u3...

Related URL: http://dx.doi.org/10.1007/s11661-000-0076-4

Abstract

Aluminum, Al-Li(8090), and Mg matrix composites with uniform distributions of SiCp reinforcement have been prepared by the vacuum infiltration technique. The infiltration kinetics have been found to increase in the order of Al, Al-Li, and Mg. The Al-Li alloy and Mg as matrix materials have shown improved wettability with SiCp in comparison to Al, leading to enhanced infiltration kinetics and reduced reinforcement degradation in the former cases. The infiltration kinetics are insensitive to preheat temperature beyond a critical temperature, which is close to the melting point of the matrix. A marginal improvement in infiltration kinetics could be obtained with Cu and Ni coating on SiC and on its dynamic oxidation. The improvement is significant at a higher preheat temperature of SiC. The Vickers hardness, measured on the SiC particles, has been shown to be an index of the strength of the interface between the matrix and reinforcement in the composite.

Item Type:Article
Source:Copyright of this article belongs to The Minerals, Metals & Materials Society.
ID Code:64073
Deposited On:04 Oct 2011 08:21
Last Modified:04 Oct 2011 08:21

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