等离子熔积制备金属-陶瓷梯度材料过程数值模拟
Numerical Simulation on Metal-ceramic Functional Gradient Material Prepared by Plasma Deposition
王桂兰1, 朱慧林1, 张海鸥2
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作者单位：(1. 华中科技大学 材料科学与工程学院, 湖北 武汉 430074; 2. 华中科技大学 机械科学与工程学院, 湖北 武汉 430074)
中文关键字：金属-陶瓷功能梯度材料； 等离子熔积； 制备过程模拟； 组分分布
英文关键字：metal-ceramic FGM; plasma deposition manufacture; forming process simulation; composition distribution
中文摘要：采用FLUENT软件模拟了等离子熔积制备金属-陶瓷梯度材料，分析了不同热源功率下熔池形貌和流场特征，计算了功能梯度材料中陶瓷体积分数沿高度方向的分布，讨论了熔积层组分分布与熔池形貌和流场的关系，探讨了热源功率和热源移动速度对陶瓷梯度体积分数的影响。最后用等离子熔积成形法制备了Al2O3-不锈钢功能梯度材料，验证了模拟计算结果的正确性。
英文摘要：The process of metal-ceramic functional gradient material (FGM), which was prepared by plasma deposition manufacturing (PDM), was simulated by FLUENT software. The influences of flow filed and pattern of molten pool on the volume fraction of deposition layer were analyzed. The volume fraction changes as the height of the deposition layer increasing in FGM and the effects of heat source power on the change of volume fraction were analyzed. At last, the correctness of the simulation results was proved.