论文部分内容阅读
采用CVD技术制备了具有不同界面层的Cf/Al金属基复合材料,获得了一种界面层阻尼功能设计的新方法.研究发现具有特殊界面层的Cf/Al复合材料的抗拉强度、弹性模量和阻尼性能比无界面层时都有明显增加,并且不同界面层的效果不同.碳层对复合材料阻尼性能的提高效果最大,硅层的提高效果不如碳层,碳硅混合层的效果居中.涂层的厚度也影响了阻尼提高的效果,较厚的碳层效果更好,这是由于提高了复合材料的阻尼应变振幅效应而产生的.研究认为发生在界面层的微滑移是其主要的阻尼机制.
The Cf / Al metal matrix composites with different interfacial layers were prepared by CVD technique and a new design method of interfacial damping was obtained.The tensile strength and elastic modulus of Cf / Al composites with special interfacial layer The amount and the damping capacity of the composites increase obviously compared with that of the non-interface layer, and the effect of different interface layers is different. The effect of the carbon layer on the damping capacity of the composite material is the greatest, and the effect of the silicon layer is not as good as that of the carbon layer and the carbon- The thickness of the coating also affects the effect of damping increase, the thicker carbon layer is better, which is due to the increased damping strain amplitude effect of the composite.Studies believe that the micro-slip occurred in the interface layer is its The main damping mechanism.