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首页> 外文期刊>DVS-Berichte >Brazing of ceramics (silicon carbide, alumina, mullite) with the BraSiC process for high temperature applications
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Brazing of ceramics (silicon carbide, alumina, mullite) with the BraSiC process for high temperature applications

机译：采用BraSiC工艺对陶瓷（碳化硅，氧化铝，莫来石）进行钎焊，用于高温应用

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摘要

The BraSiC process has initially been developed for brazing SiC based materials for high temperature applications, especially for the realisation of large and complex industrial components. Recently, this process has been extended to porous SiC based composites [1] and other ceramics such as alumina and mullite. The new BraSiC fillers alloys have been defined to limit as far as possible the thermal mismatch between these ceramics and the braze. Non-reactive with silicon carbide, alumina and mullite, the process allows the reparation of the joints that can be re-brazed as new after a chemical dissolution of the braze. CEA has also developed a surface treatment [2] of the oxide ceramics to modify the wettability of the surfaces by the BraSiC braze. This process allows a selective metallization of the oxide surface and the brazing in capillary configuration. The brazed joints feature high mechanical strength, comparable to ceramic itself: failures generally occur in the ceramic not in the joint. Examples of the fabrication of the brazed joints are described in this paper.
机译：最初开发BraSiC工艺是为了将SiC基材料钎焊用于高温应用，特别是用于实现大型和复杂的工业组件。最近，该方法已扩展到多孔SiC基复合材料[1]和其他陶瓷，例如氧化铝和莫来石。新型BraSiC填充合金已被定义为尽可能限制这些陶瓷与钎焊之间的热失配。该工艺与碳化硅，氧化铝和莫来石无反应，可以修复焊缝，在钎焊化学溶解后可以重新钎焊成新焊缝。 CEA还开发了一种氧化物陶瓷的表面处理方法[2]，以通过BraSiC钎焊改变表面的润湿性。该过程允许氧化物表面的选择性金属化和毛细管构造的钎焊。钎焊接头具有很高的机械强度，可与陶瓷本身媲美：失效通常发生在陶瓷中，而不是在接头中。本文介绍了钎焊接头的制造示例。

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