Pd-Ni基高温钎料对Si3N4陶瓷的润湿与界面连接

陈波; 熊华平; 毛唯; 程耀永; 叶雷; 吴欣; 李晓红

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航空材料学报 ›› 2006, Vol. 26 ›› Issue (5) : 41-45.

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论文

Pd-Ni基高温钎料对Si₃N₄陶瓷的润湿与界面连接

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Wettability of Pd-Ni Based Brazing Fillers on Si₃N₄ Ceramic and Interfacial Bonding

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摘要

采用座滴法研究了三种钎料Pd-Ni、PdNi-(5~14)Cr(wt%,下同)和PdNi-(15~26)Cr在Si3N4陶瓷上的润湿情况。结果表明,在1250℃/30min的真空加热条件下,随着Cr元素的加入钎料润湿性逐渐改善。Pd-Ni钎料中未加入Cr的情况下,反应层中主要是Pd参与反应,生成相应的Pd-Si等相,Ni也参与反应生成Ni-Si等相;当钎料中加入活性元素Cr以后,反应层中主要为Cr参与反应,同时生成相应的Cr-N和Cr-Si等相,另外反应层中也有一部分Ni参与反应。在PdNi-(5~14)Cr/Si3N4的界面反应层中出现了薄的黑色Cr-N层,对于Cr含量更高的PdNi-(15~26)Cr钎料,在靠近Si3N4的界面即形成Cr-N反应层。

Abstract

The wetting behavior of PdNi, PdNi-(5-14)Cr and PdNi-(15-26)Cr on Si3N4 was studied by the sessile drop method.The results show that on the heating condition at 1250℃ for 30 min in vacuum,the filler metal's wettability of the filler metal on Si3N4 is improved by increasing the Cr content.For Pd60-Ni40 brazing filler,mainly Pd-Si and Ni-Si phases were formed as the reaction products with Si3N4.When active element Cr was added into Pd-Ni filler,Cr also participated in the interfacial reaction,that is,for PdNi-(5-14)Cr brazing filler,a black and thin Cr-N layer was visible in the reaction layer.In the case of PdNi-(15-26)Cr filler,the Cr-N layer was formed just at the interface close to the Si3N4.

导出引用

陈波, 熊华平, 毛唯, 程耀永, 叶雷, 吴欣, 李晓红. Pd-Ni基高温钎料对Si₃N₄陶瓷的润湿与界面连接[J]. 航空材料学报, 2006, 26(5): 41-45

CHEN Bo, XIONG Hua-ping, MAO Wei, CHENG Yao-yong, YE Lei, WU Xin, LI Xiao-hong. Wettability of Pd-Ni Based Brazing Fillers on Si₃N₄ Ceramic and Interfacial Bonding[J]. Journal of Aeronautical Materials, 2006, 26(5): 41-45

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