Investigation of Properties and Thermochemical Mechanisms of the Aging of RAB-Ceramic-to-Metal-Joints

RAB陶瓷-金属接头性能及老化热化学机制研究

• 批准号: 164190058
• 负责人: Professorin Dr.-Ing. Kirsten Bobzin
• 金额: --
• 依托单位: Access e.V.
• 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 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/164190058?language=en
• 关键词: Investigation; Properties; Thermochemical; Mechanisms; Aging

Ceramic-to-Metal-Joints can be brazed in air with silver based fillers by the Reactive Air Brazing Process. During the first period of this project (BO 1979/19-1 PAK 524) the reactions between fillers and base materials were analyzed in detail und new fillers and processes were developed successfully. Beyond the brazing process itself the long term behavior of the brazed joints is a critical aspect. The growth of the reaction layers between the filler and the steel occurring in standard fillers at typical operating conditions can lead to failure of the joint. Consequently the aim is to investigate, understand and influence the aging behavior of the RAB joints. The influence of the different parts of the joint respectively the brazing gap (steel, metal oxides, reaction zones, silver matrix, ceramic) on the aging at service conditions has to be analyzed. It has to be clarified how the growth of the reaction layers can be controlled by varying the filler metals and/or the brazing process. Furthermore the mechanical properties of joints brazed with new developed fillers and processes will be determined.

采用反应空气钎焊工艺，可以用银基填料在空气中钎焊陶瓷-金属接头。在该项目的第一阶段（BO 1979/19-1 PAK 524），详细分析了填料与基材之间的反应，并成功开发了新的填料和工艺。除了钎焊过程本身，长期行为的钎焊接头是一个关键方面。在典型操作条件下，标准填料与钢之间反应层的生长会导致接头失效。因此，目的是研究、理解和影响RAB接头的老化行为。分析了接头不同部位的钎焊间隙（钢、金属氧化物、反应区、银基体、陶瓷）对使用条件下的时效的影响。必须澄清如何通过改变填充金属和/或钎焊工艺来控制反应层的生长。此外，还将确定新开发的钎料和钎焊工艺钎焊接头的力学性能。