Multi-energy field coupling laser processing of ceramic matrix composites

Ceramic matrix composites (CMC) have great potential in the field of aeronautics due to their outstanding stability in high temperature, excellent mechanical strength and corrosion resistance. However, its inherent high hardness, high brittleness, and significant anisotropy lead to issues such as edge chipping, delamination and abnormal tool wear with traditional method. As a non-contact high-precision manufacturing technology, laser processing has become an effective method for the processing of turbine blade film cooling holes and turbine outer ring microgrooves. The core principle of CMC single laser processing technology is to achieve selective ablation or phase change stripping of materials by accurately regulating laser wavelength, pulse width, scanning strategy and other parameters. However, the instantaneous high temperature in single laser processing will lead to a variety of thermal defects. Therefore, the CMC multi-energy field coupling laser processing technology was summarized, and the future development direction of multi-energy field coupling laser processing was proposed to expand the application of CMC in the processing of aero-engine hot-end components.