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对铝合金表面等离子喷涂制备Al/SiC复合涂层进行了研究,探索了SiC体积分数对复合粉末的沉积行为以及Al/SiC复合涂层性能的影响规律。研究发现,在等离子焰流中,纯SiC发生降解和氧化。SiC含量越高,等离子喷涂沉积Al/SiC复合涂层越困难,纯SiC沉积后与基体粘结层之间存在裂纹;SiC含量越高,Al/SiC复合涂层硬度越高。Al/SiC(50:50)复合涂层厚度70μm,显微硬度达到3690 MPa,对铝合金表面起到强化效果。
The Al / SiC composite coating prepared by plasma spraying on the surface of aluminum alloy was studied, and the influence of SiC volume fraction on the deposition behavior and the properties of Al / SiC composite coating was explored. The study found that in the plasma flame, pure SiC degradation and oxidation. The higher the SiC content, the more difficult the Al / SiC composite coating is deposited by plasma spraying and the crack exists between the pure SiC and the substrate adhesive layer. The higher the SiC content, the higher the hardness of the Al / SiC composite coating. Al / SiC (50:50) composite coating thickness of 70μm, micro-hardness of 3690 MPa, the aluminum alloy surface to play a reinforcing effect.