Graded Microstructure at Fiber / Copper Matrix Interface in FRM Fabricated by the Reaction at Narrow Holes Method

Abstract:

The reaction at narrow holes method (RANH method) has been proposed for fabricating fiber reinforced metal (FRM), such as an intermetallic compound fiber / metal matrix composite. This study clarifies a microstructure at a fiber / metal matrix interface of FRM fabricated by using a combination of pure-copper and pure-aluminum in the RANH method. Pure-aluminum fiber was inserted into a narrow hole drilled in the copper matrix. The assembly comprising the pure-aluminum fiber and the pure-copper matrix was heated to a temperature greater than eutectic temperature of the copper-aluminum binary alloy. A molten aluminum reacted with copper to form an annular reacted region consisting of g1 intermetallic compound in a single phase near the edge of the narrow hole. The g1 intermetallic compound has very high hardness on the order of 800-900 HV. The annular reacted region may have a high tensile strength and may work as a reinforcing metal fiber in FRM.

• Periodical: Materials Science Forum (Volumes 492-493)
• Pages: 737-742
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.492-493.737
• Online since: August 2005
• Authors: Yasuhiko Tanaka, Takeshi Goto, Yoshimi Watanabe
• Keywords: Aluminum (Al), Composite, Copper (Cu), Fiber, Fiber Reinforced Metal FRM, Hardness, Intermetallic Compound (IMC), Microstructure

References

[1] Y. Watanabe and T. Goto; Materials Sci. Forum Vols. 426-432 (2003), p. (1957).

[2] T. B. Massalski, Editor-in-Chief: Binary Alloy Phase Diagrams, Second Edition Plus Updates on CD-ROM Version 1. 0 (ASM International, USA 1996).