It is needed to join C/C composite to other materials since its individual use is limited. Brazing is a method to join C/C composite that has been studied most, maturest and most widely used in recent decades. The quality of a brazed joint is largely determined by the intermediate layer material. It is significant to choose filler materials reasonably. C/C composite is difficult to be wetted by common brazing filler materials. Moreover, there is a large difference in the coefficient of thermal expansion between C/C composite and metals. At present, there is no brazing filler alloy exclusively recommended for commercial C/C composites and metal brazing. Usually, active elements are added into filler metals to improve the wettability of them on C/C composite surface. The existing research includes Al-based, Ag-based, Cu-based, Ti-based, Ni-based brazing filler metals, and so on. In addition, various particle reinforced composite filler materials and stress buffer metal interlayer added composite filler materials have been studied for brazing C/C composite. The summarization of the overview on the application of intermediate filler metals is made in this paper. The basic reference basis is provided for the subsequent brazing filler metals development and joint performance improvement for C/C composite brazing.

中文翻译：

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碳-碳复合材料钎焊填充材料综述

由于C / C复合材料的单独使用受到限制，因此需要将C / C复合材料与其他材料连接起来。钎焊是连接C / C复合材料的一种方法，近几十年来研究最深入，最成熟且使用最广泛。钎焊接头的质量在很大程度上取决于中间层材料。合理选择填充材料很重要。普通的钎焊填充材料很难润湿C / C复合材料。此外，C / C复合材料与金属之间的热膨胀系数存在很大差异。目前，还没有专门推荐用于商用C / C复合材料和金属钎焊的钎料。通常，将活性元素添加到填充金属中以改善其在C / C复合材料表面上的润湿性。现有研究包括铝基，银基，铜基，钛基，镍基钎料等。另外，已经研究了各种颗粒增强复合填料和添加了应力缓冲金属夹层的复合填料，用于钎焊C / C复合材料。本文对中间填充金属的应用概述进行了总结。为后续钎焊填充金属的开发和C / C复合钎焊接头性能的改善提供了基本的参考依据。