Processing and Properties of Metallic and Ceramic Matrix Composites by a Novel Spraying Technique
K. H. Baik
METALS AND MATERIALS International
A concurrent fiber winding and low pressure plasma spraying process has been developed to manufacture multi-ply fiber reinforced metallic and ceramic matrix composites in a single spraying operation. In this study, four-layer SiC fiber reinforced Ti-6Al-4V and SiAlON-MoSi2 composites have been manufactured, and the composite coupons have been evaluated in terms of fiber breakage, fiber distribution, matrix microstructure, interfacial reaction, and fiber damage. This novel spraying route enabled a wide range of composite systems to be produced, offering rapidly solidified matrix microstructure, regular fiber spacing and minimized interfacial reaction. Fiber damage was considered as a potential major disadvantage, but compared with the more widely investigated foil-fiber-foil route, this novel spraying approach resulted in less degradation in fiber strength. Further minimization of fiber damage could be achieved by precise control over processing conditions and large damage tolerance of fiber coating.
Composites; Interface; Fiber damage; Plasma spraying; Rapid solidification
|
