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Microstructure and mechanical properties

显微组织和力学性能

基本信息

批准号：
164175303
负责人：
Professor Dr.-Ing. Tilmann Beck
金额：
--
依托单位：
Lehrstuhl für Werkstoffkunde (WKK)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/164175303?language=en
关键词：
Microstructure mechanical properties

项目摘要

With their joint proposal Reactive Air Brazing of Metal-Ceramics Compounds,IWM (RWTH Aachen University) and IEK-2 (Forschungszentrum Jülich) apply for a second two-year funding period. During the first project phase, the mechanical behavior of reactive air brazed metal-ceramics compounds, the adhesion mechanisms in the interfaces between braze metal and joined components and the damage mechanisms depending on chemistry, processing and thermal ageing were investigated. During the proposed second funding period, an in-depth analysis of damage induced by thermal ageing is planned with special focus on the formation, composition and mechanical properties of the strength-limiting reaction layers formed at the interfaces of the brazed joint during processing and high temperature exposure. For these investigations, mechanical testing and in-depth scanning and transmission electron microscopy studies are planned at brazed joint variants selected according to the results of the first project phase. At the same time, the existing FEM model of brazed joints will be extended in order to simulate the reaction zones at the interfaces, especially their influence on mechanical strength of the brazed joint. This model will be used to predict the mechanical behavior of several metal/ceramic compounds, especially compounds with large thermal expansion mismatch. Extensive mechanical characterization (i.e. by bending, compound tension and double shear testing of brazed joints) of metal-ceramic compounds in the as-received state and after isothermal ageing or thermal cycling allows calibration and validation of the FEM model. Additionally, so called mechanically assisted diffusion bonding, which proved -according to preliminary investigations during the first project phase- to be a promising alternative joining process will be used to produce compounds with large thermal expansion mismatch of their components. Adhesion and shear strength of these compounds will be measured and microscopic investigation, especially of the interface regions is planned

IWM（RWTH亚琛大学）和IEK-2（Forschungszentrum Jülich）联合提出了金属陶瓷化合物的反应性空气钎焊的联合提案，申请第二个两年期的资助。在项目的第一阶段，研究了反应性空气钎焊金属陶瓷化合物的机械行为，钎焊金属和连接部件之间界面的粘附机制以及取决于化学、加工和热老化的损伤机制。在拟议的第二个资助期内，计划对热老化引起的损坏进行深入分析，特别关注加工和高温暴露期间在钎焊接头界面处形成的强度限制反应层的形成、组成和机械性能。对于这些调查，机械测试和深入的扫描和透射电子显微镜研究计划在钎焊接头的变体选择根据第一个项目阶段的结果。同时，将现有的钎焊接头有限元模型进行扩展，以模拟界面处的反应区，特别是它们对钎焊接头机械强度的影响。该模型将用于预测几种金属/陶瓷复合材料的力学行为，特别是具有大的热膨胀失配的复合材料。金属陶瓷化合物在接收状态和等温老化或热循环后的广泛机械表征（即通过弯曲、复合拉伸和钎焊接头的双剪切测试）允许对FEM模型进行校准和验证。此外，根据第一项目阶段的初步研究，所谓的机械辅助扩散结合被证明是一种有前途的替代连接工艺，将用于生产其组件具有较大热膨胀失配的化合物。将测量这些化合物的粘附力和剪切强度，并计划进行显微镜调查，特别是界面区域的调查

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Mechanical Properties of Reactive Air Brazed (RAB) Metal/Ceramic Joints. Part 1: Visco‐Plastic Deformation of Silver‐Based Reactive Air Brazes

DOI：
10.1002/adem.201400072
发表时间：
2014-12
期刊：
Advanced Engineering Materials
影响因子：
3.6
作者：
E. Skiera;J. Brandenberg;Chichi Li;T. Beck;L. Singheiser;B. Kuhn
通讯作者：
E. Skiera;J. Brandenberg;Chichi Li;T. Beck;L. Singheiser;B. Kuhn

Improving Contour Accuracy and Strength of Reactive Air Brazed (RAB) Ceramic/Metal Joints by Controlling Interface Microstructure

DOI：
10.1002/adem.201100274
发表时间：
2012-06
期刊：
Advanced Engineering Materials
影响因子：
3.6
作者：
Chichi Li;B. Kuhn;J. Brandenberg;T. Beck;L. Singheiser;K. Bobzin;N. Bagcivan;N. Kopp
通讯作者：
Chichi Li;B. Kuhn;J. Brandenberg;T. Beck;L. Singheiser;K. Bobzin;N. Bagcivan;N. Kopp

Dual‐Gas Stability of RAB‐Joints in SOFC Applications

SOFC 应用中 RAB 接头的双气体稳定性