Critical Solidification Experiments for a new Quality of Thermodynamic Key Data

关键凝固实验获得新质量的热力学关键数据

基本信息

项目摘要

The proposed project is central in the bundled proposal inasmuch as the data provided form the other projects will be applied in the process for which they have been generated, the liquid/solid phase transformation. In combination with simulation calculations based on the provided data, critical solidification experiments will be designed and carried out that allow for a severe test of the data. The novelty from the point of view of solidification experiments is that instead of using technically relevant alloy compositions and processing conditions, the experimental parameters will be chosen in a way that qualitative differences are to be expected in the solidified microstructure upon a variation of the experimental parameters. Quantitative experimental errors in the microstructural parameters (phase fractions, length scales) determined in the solidified structures generally obscure the reason for deviations between experimental and theoretical results – these errors will interfere less in the present project. Thus, the collectivity of the generated data is verified not in a direct way, but rather by evaluating the consequences for the solidification process. This gives the possibility to further improve the accuracy of particular parameters: the effects of slightly deviant thermochemical or thermophysical data will cumulate during solidification – even if a given value is correct within an acceptable error limit, the cumulation during solidification might show its limitation for being included in the description of the solidification process. This allows for a further improvement of the provided data. A last important point of the project concerns investigations that are characteristic for a quaternary alloy system, i.e. the quantification of the influence of small additions of alloying elements or impurities. The third and/or fourth alloying element can be used as impurity in simulation and experiment. It is expected that insight will be gained about the limit from which impurities need to be considered as additional alloying element.
拟议的项目是捆绑提案的中心,因为从其他项目中提供的数据将应用于产生这些数据的过程,即液相/固相转化。结合基于所提供数据的模拟计算,将设计并进行关键的凝固实验,以便对数据进行严格的测试。从凝固实验的角度来看,其新颖之处在于,实验参数的选择不使用技术上相关的合金成分和加工条件,而是根据实验参数的变化在凝固组织中产生质的差异。在凝固组织中确定的微观结构参数(相分数,长度尺度)的定量实验误差通常掩盖了实验和理论结果之间偏差的原因-这些误差对本项目的干扰较小。因此,生成的数据的集体性不是以直接的方式验证的,而是通过评估固化过程的后果来验证的。这为进一步提高特定参数的准确性提供了可能性:在凝固过程中,稍微偏离的热化学或热物理数据的影响将会累积——即使给定的值在可接受的误差范围内是正确的,凝固过程中的累积也可能显示其在描述凝固过程时的局限性。这允许进一步改进所提供的数据。该项目的最后一个重点是对四元合金体系的研究,即对少量添加的合金元素或杂质的影响进行量化。第三和/或第四合金元素可以用作模拟和实验中的杂质。预计将获得关于杂质需要被视为附加合金元素的限度的见解。

项目成果

期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Growth of an oriented Bi40−xInxTe60 (x = 3, 7) thermoelectric material by seeding zone melting for the enhancement of chemical homogeneity
  • DOI:
    10.1039/c4ce00577e
  • 发表时间:
    2015-04
  • 期刊:
  • 影响因子:
    3.1
  • 作者:
    Dongmei Liu;H. Engelhardt;Xinzhong Li;A. Löffler;M. Rettenmayr
  • 通讯作者:
    Dongmei Liu;H. Engelhardt;Xinzhong Li;A. Löffler;M. Rettenmayr
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Professor Dr. Markus Rettenmayr (†)其他文献

Professor Dr. Markus Rettenmayr (†)的其他文献

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{{ truncateString('Professor Dr. Markus Rettenmayr (†)', 18)}}的其他基金

Phase selection and nucleation at a plane phase interface with jumps in the chemical potential
具有化学势跳跃的平面相界面处的相选择和成核
  • 批准号:
    328636876
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Metal alloy solidification in thin capillaries - a study of the solid-liquid interfacial energy anisotropy using a novel approach
薄毛细管中的金属合金凝固——利用新方法研究固液界面能量各向异性
  • 批准号:
    274832340
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Thermodynamics and Kinetics of Multicomponent Metallic and Ceramic Materials
多元金属和陶瓷材料的热力学和动力学
  • 批准号:
    266629925
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Workshops for Early Career Investigators
Thermoelectric materials in the alloy system Bi2Te3-In2Te3
Bi2Te3-In2Te3合金系热电材料
  • 批准号:
    265148924
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Phase stability of alloy-type lithium storage anode materials
合金型储锂负极材料的相稳定性
  • 批准号:
    180081180
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Thermodynamics and interdiffusion at interfaces with potential jumps, part II
具有势能跳跃的界面处的热力学和相互扩散,第二部分
  • 批准号:
    166218519
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Evolution of Concentration Distribution and Microstructure During Melting/Resolidification Processes
熔化/再凝固过程中浓度分布和微观结构的演变
  • 批准号:
    5375725
  • 财政年份:
    2002
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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