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多层喷射共沉积制备SiCP/Al-8.5Fe-1.3V-1.7Si复合材料

, PP. 109-114

Keywords: 多层喷射沉积,耐热铝合金,复合材料,SiC颗粒

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Abstract:

采用多层喷射沉积工艺制备SiCP/Al-8.5Fe-1.3V-1.7Si复合材料,研究了雾化及沉积工艺参数对沉积坯状态及SiC颗粒捕获的影响。结果表明,液流直径大、雾化气体压力小、喷射高度小会导致沉积坯组织恶化,反之则造成收得率低、致密度低。雾化器扫描不均匀则会造成沉积坯形状不均匀,而且会由于热量集中导致显微组织恶化。SiC颗粒输送压力的提高有利于SiC颗粒的捕获以及颗粒的均匀分布。多层喷射沉积制备SiCP/Al-8.5Fe-1.3V-1.7Si的优化工艺参数为:液流直径3.6mm,雾化气体压力0.8MPa,喷射高度200mm,SiC颗粒输送压力0.5MPa。沉积坯存在两种SiC-Al界面:晶态Si界面层与非晶态SiO2界面层。

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