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5篇 您的检索式:作者名="L.Ratke"
    题名 作者 年代 出处 被引量
1Modeling and Simulation of the Microstructure Evolution during a Cooling of Immiscible Alloys in the Miscibility Gap显示文摘The microstructure development during a cooling period of alloys being immiscible in the liquid state such as Al-Pb or AI-Bi has gained renewed scientific and technical interest during the last decades. Experiments have been performed to investigate the phase transformation kinetics in the liquid miscibility gap and numerical models have been developed to simulate and analyze the solidification process. The recently developed computational modeling techniques can, to some extent, be applied to describe the decomposition, the spatial phase separation and the microstructure evolution during a cooling period of an immiscible alloy through the miscibility gap. This article overviews the researches in this field.JiuzhouZHAO L.Ratke2002Journal of Materials Science & Technology2002,18,3:7
2偏晶合金液-液相变过程模拟显示文摘建立了能描述在弥散相液滴形核、扩散长大、碰撞凝并及两液相空间分离等因素共同作用下,偏晶合金液-液相变过程中组织演变过程的数学模型,将计算的温度场和浓度场与控制凝固组织演变的动力学方程相耦合,模拟研究了单向冷却条件下Al-Pb合金液-液相变过程中的组织演变过程。结果表明,随着冷却的进行,液-液相变区不断由试样底部向试样顶部推进,直至贯穿整个试样,由于在凝固过程中弥散相液滴进行Marangoni迁移和Stokes运动,试样中的某些部位会出现液滴贫化、过饱和度增加和多次形核现象。赵九洲 胡壮麒 L.Ratke 2004金属学报2004,40,1:7
3Effect of Brownian Coagulation on the Liquid-liquid Decomposition in Gas-atomized Alloy Drops显示文摘建模并且模拟被执行了让 Al-Pb 合金在 theliquid 液体期间在把气体分裂成原子的落下在微观结构发展调查 Brownian 凝结效果分解。结果显示 Brownian 凝结在变粗上有一个弱效果在成核和相对强壮的效果少数阶段微滴。液体液体分解上的 Brownian 凝结的 Theinfluence 随直径的增加减少(或处于冷却的率的减少) 把分裂成原子的落下。Jiuzhou ZHAO Lingling GAO Jie HE L.Ratke 2006Journal of Materials Science & Technology2006,22,3:2
4Modeling of the Microstructure Evolution in Continuously Cast Al-pb Alloys显示文摘A numerical model is presented describing the microstructure evolution of an immiscible alloy under the continuous casting conditions. Calculations are carried out to investigate the microstructure evolution in a vertical strip cast sample of Al+5wt pct Pb alloy. The numerical results show that there exists a peak value for the supersaturation in front of the solid/liquid interface, and the minority phase droplets are nucleated in a region around this peak. Under strip casting conditions the Marangoni migration dominates the motion of droplets. This leads to an accumulation of the minority phase droplets in front of the solid/liquid interface.JiuzhouZHAO L.Ratke 2002Journal of Materials Science & Technology2002,18,4:1
5高度多孔纳米结构纤维素纤维的溶液纺丝工艺显示文摘由纤维素生产纤维的常规生产方法,迄今已生产了具有致密微结构和极大长径比的材料。在此介绍的表面多孔的纤维是一种新型纤维状材料,为科学家和工程师提供了许多挑战和机会。由于纳米结构纤维的特性,它在工业产品,例如从过滤到类似药物释放载体的特殊产品的许多用途中具有很大潜力。通过采用溶胶凝胶方法,首次制成了表面多孔的纳米结构纤维素纤维。C.Hacker T.Gries C.Popescu L.Ratke 骆为林(译) 行兰(校) 2009国际纺织导报2009,37,8:0
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