超短脉冲激光加工陶瓷基复合材料制孔研究

Study on Micropore Preparation of Ceramic Matrix Composites by Ultra-short Pulse Laser Processing

陶瓷基复合材料由于能够提高零件的耐高温和推重比等性能,适用于航天发动机热端部件,但由于在传统加工过程中易出现崩边、层间撕裂等缺陷,且无法实现微孔加工限制了其使用。通过选择飞秒级超短脉冲激光加工制备陶瓷基复合材料微孔,探索加工方案、优化工艺参数,对加工后的表面完整性进行评价,确定了超短脉冲激光微孔加工孔径范围、几何精度及表面质量,有助于解决陶瓷基复合材料微孔加工难题。

Because of its contribution in high temperature resistance and thrust weight ratio,the ceramic matrix composites are suitable for use in aerospace engines. However,the application of ceramic matrix composites is limited due to the defects such as chipping and interlaminar tearing in traditional processing,as well as its unablity to micro-hole machining. Firstly,the femtosecond ultra-short pulse laster is used to process micro-hole of ceramic matrx composites. Then,the processing scheme and parameters is optimized and the surface integrity after processing is evaluated. Finally,the aperture range,geometric accuracy and surface quality by ultra-short pulse laser machining is confirmed,which helps to solve the problem in ceramic matrix composites micropore machining.