| 深过冷合金中的耗散结构及对凝固组织的影响 |
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| 引用本文： | 蒲健,王敬丰,肖建中,甘章华,易回阳,崔崑.深过冷合金中的耗散结构及对凝固组织的影响[J].材料导报,2003,17(9):78-80. |
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| 作者姓名： | 蒲健 王敬丰 肖建中 甘章华 易回阳 崔崑 |
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| 作者单位： | 华中科技大学模具技术国家重点实验室,武汉,430074 |
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| 基金项目： | 国家自然科学基金，50171028， |
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| 摘 要： | 在深过冷Pd82Si18熔体中发现一种液相调幅状的自组织结构。运用Pringogine的耗散结构理论，分析了在远离平衡态，深过冷熔体产生自组织的原因及其过程。分析表明，过冷度可以表示非平衡态过程对平衡态过程的偏离程度，熔体随过冷度的变化而产生的热力学涨落，以及其产生的非线性效应是深过冷熔体产生自组织的重要原因。
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| 关 键 词： | 深过冷合金 耗散结构 凝固组织 热力学 过冷度 非线性效应 自组织结构 |
Dissipation Structure in Highly Undercooled Alloy and Its Influence on Solidification Microstructure |
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| PU Jian WANG Jinfeng XIAO Jianzhong GAN Zhanghua YI Huiyang CUI Kun.Dissipation Structure in Highly Undercooled Alloy and Its Influence on Solidification Microstructure[J].Materials Review,2003,17(9):78-80. |
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| Authors: | PU Jian WANG Jinfeng XIAO Jianzhong GAN Zhanghua YI Huiyang CUI Kun |
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| Abstract: | A kind of liquid spinodal-like self organization has been discovered in highly undercooled Pd32S18 melt. We employ Pringogine's dissipation structure theory to analyze causes arid processing of self organization formation in undercooled melt far from equilibrium state. Our analysis indicates that undercooling may express serve as an indicator of departure from equilibrium state. One of the major causes of self organization formation is thermodynamics fluctuations occuring in undercooled melt and nonlinear effect associated with increasing undercooling of melt. |
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| Keywords: | self organization undercooling spinodal dissipation structure |
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