Wettability and interfacial reactions of PdNi-based brazing fillers onC-C composite

来源期刊:中国有色金属学报(英文版)2010年第2期

论文作者:CHEN Bo 熊华平 毛 唯 程耀永

文章页码:223 - 226

Key words:PdNi-based brazing filler; diffusion layer; wettability; interfacial reaction

Abstract: The wettability and interfacial reactions of four kinds of PdNi-based brazing fillers on C-C composite were studied with the sessile drop method. The results showed that the wettability of these brazing fillers was improved with the increase of Cr content. Cr distributed at the interface of brazing filler/C-C composite and the formation of Cr23C6 phase was speculated. In the interface between Ni-33Cr-24Pd-4Si brazing filler and C-C composite, element Cr reacted with C-C to form Cr-C reaction layer. Pd together with Si participated in the interfacial reactions and formed Pd2Si and Pd3Si phases. Furthermore, in this reaction zone, the residual brazing alloy became Ni-rich and Pd-depleted.

基金信息:the National Natural Science Foundation of China

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