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陶瓷颗粒烧结过程中气孔的扩散转移 被引量:3

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摘要 用扩散界面相场模型研究陶瓷烧结过程中五球模型内部的气孔扩散与演化过程。采用一组随时间和空间连续变化的取向场变量和浓度场变量来表征烧结过程微结构特征,并分别用Ginzburg-Laudau动力学方程和Cahn-Hilliard动力学方程描述取向场变量和浓度场变量随时间的演化。计算模拟结果表明,陶瓷颗粒间的气孔主要是通过晶界向较大的气孔扩散聚集和颗粒外部空间扩散,这些结果与已有的陶瓷颗粒烧结实验和理论结果相符合,揭示了陶瓷颗粒烧结致密化过程的本质。
出处 《广西物理》 2010年第1期12-15,共4页 Guangxi Physics
基金 国家自然科学基金(50661001 50061001) 广西自然科学基金项目(0991026 0832029 0639004)
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共引文献46

同被引文献92

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