Microstructures and Wear-Resistant Properties of In Situ WCp/W Wire Hybrid Reinforced Iron Matrix Composites via Electromagnetic Field
In the paper, tungsten carbide (WC) particles can be in-situ synthesized by applying electromagnetic field to the system consisting of tungsten wires and gray cast iron melt at 1573 K. The microstructures and wear-resistant properties of composites reinforced by both WC particles and the residual tungsten wires were investigated by XRD, SEM, EDS, micro-hardness and pin-on-disc wear measurements. The results show that, with enhancing frequencies of electromagnetic field from 0 to 5 KHz, the amounts of in-situ WC particles increased and of the residual tungsten wires gradually decreased until tungsten wires completely reacted. Due to the higher hardness of in-situ WCp(2100-2231HV0.1) and the strong interfacial bonding, the composites displayed an excellent wear-resistant properties. When the frequency was 5 kHz, the wear loss for the composite fabricated was optimal and 2.69 times lower than that of reference samples.
Yansheng Yin and Xin Wang
L. B. Niu et al., "Microstructures and Wear-Resistant Properties of In Situ WCp/W Wire Hybrid Reinforced Iron Matrix Composites via Electromagnetic Field", Advanced Materials Research, Vols. 79-82, pp. 1463-1466, 2009