Abstract
In recent years, in order to better environment harmony performances of industrial products, investigation of vibration control technology of the sintered material is required. In this paper, the vibration dumping behavior of Cu-Sn/Graphite sintered composite material was investigated by a FFT analyzer, and was compared with the microstructure of the sintered composite material.
Cu, Sn, and Graphite powders were used as initial substances. The powders were mixed and pressed into a plate shaped compact with 200 MPa. Using a vacuum furnace, the green compact was sintered at 825–1075 °C for 1 hour. By changing the mixing ratio of the powders and the sintering temperature, some kinds of the composite material plates were produced. For the composite material obtained, microstructure, Vickers hardness, and the vibration dumping behavior were measured.
The composite materials were consisted from the crystal grain of 15–69 μm, and the mixed Graphite particles were dispersed on the grain boundary. Twin crystal was also found in the composite materials. The damping coefficient of composite material depended on the sintering microstructure and twin crystal. Relationship between vibration dumping mechanisms and microstructure was discussed.
