INTERNAL FRICTION BEHAVIOR OF SiC PARTICLE REINFORCED MMCS PREPARED BY SPRAY CODEPOSITION

The effect of SiC particulate on the resultant damping behavior of the asspray deposited high silicon alloy ZA27 was investigated in an effort to develop a high damping materials. The high and low frequency internal friction behavior was conducted on Sound Frequency and Multifunctional Internal Friction Apparatus. The experimental results show that the damping capacities of the MMCs reinforced by SiC particulate were improved a lot, and furthermore, hot extrusion improved the damping capacities. Finally, the operative damping mechanisms were discussed in the light of the data obtained from characterization of microstructure based on the theory of Schoeck.