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通过内耗测量法研究了石墨颗粒增强Cu基复合材料(Gr/Cu-MMCs)的阻尼行为,并结合微观结构进行分析,讨论了复合材料阻尼性能提高的机理。结果表明,石墨颗粒的引入提高了复合材料的阻尼能力,且随石墨颗粒体积分数的增加而增加。除了本征阻尼对复合材料有影响外,位错阻尼及界面阻尼是材料获得高阻尼性能的重要机制。
The damping behavior of graphite particle reinforced Cu matrix composites (Gr / Cu-MMCs) was studied by internal friction measurement. The damping mechanism of the composites was discussed based on the microstructure analysis. The results show that the introduction of graphite particles improves the damping ability of the composites, and increases with the volume fraction of graphite particles. In addition to the intrinsic damping has an impact on the composite materials, dislocation damping and interface damping is an important mechanism for the material to obtain high damping performance.