【摘要】 纤维增强的镁基复合材料中,通过在纤维表面沉积一层热解碳而获得了一种特殊的界面层,研究了该复合材料的阻尼性能。结果表明,温度低于170℃时,纤维表面的碳涂层显著提高了复合材料的阻尼性能,相应的阻尼机制归结于位错阻尼、界面阻尼和组元的本征阻尼;高于170℃时,由于界面阻尼和晶界阻尼的贡献,没有涂层的复合材料的阻尼性能超过了有涂层的复合材料。更多还原

【Abstract】 In fiber reinforced magnesium matrix composites, a special interfacial layer was obtained by coating a pyrocarbon on the surface of fibers, and then, the damping capacity of the composites was studied. The results show that, the carbon coating on the fibers may improve the overall damping of composite when temperature is lower than about 170℃, the relevant damping mechanisms are ascribed to dislocation damping, interface damping and the intrinsic damping of the constituents; while at temperature above 170℃, the damping of the composite without the coating exceeds that with the coating owing to the contribution of interface damping and grain boundary damping.更多还原