Paper number 284


J. Beddoes1, A.K. Koul2, P. Saxena3

1Department of Mechanical & Aerospace Engineering,
Carleton University
1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
2Structures, Materials & Propulsion Laboratory
Institute for Aerospace Research,
National Research Council, Ottawa, K1A 0R6, Canada
3Formerly graduate student, now with Saint-Gobain/
Norton Chemical Process Products Corp.,
P.O. Box 350, Akron, Ohio, USA

Summary This paper describes a unique vacuum plasma spray technique for the manufacture of axi-symmetric titanium matrix composite structures. The process involves the simultaneous winding of a reinforcing fibre and vacuum plasma spraying the matrix onto a rotating and axially translating mandrel followed by hot isostatic pressing. The attributes of Ti-6Al-4V rings reinforced with 142 (m diameter silicon carbide fibre produced using this technique are described, including: the response to hot isostatic pressing and heat treatment, interfacial reactions, and interface shear strength. The interface shear strength compares favourably to Ti-6Al-4V/SiC structures produced by other processes. By adjusting the rotational speed, and/or axial mandrel motion, the fibre distribution and volume fraction can be controlled. The results indicate that this process represents a viable technique for the manufacture of fibre reinforced titanium matrix composites for axi-symmetric geometries.
Keywords titanium, MMC, fibre, SiC, axi-symmetric, plasma spray, gas turbine, fibre push-out, nanomechanical probe.

Theme : Metal Matrix Composites ; Processing and Forming

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