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无机材料学报

无机材料学报

• 研究论文 • 上一篇    

Ti-Si共晶钎料的制备及其对SiC陶瓷可焊性

李家科1，2, 刘 磊1， 刘意春1, 张文龙1， 胡文彬1   

  1. 1.上海交通大学 金属基复合材料国家重点实验室，上海 200240； 2.景德镇陶瓷学院 材料科学与工程学院，景德镇 333001
  • 收稿日期:2008-03-16 修回日期:2008-05-11 出版日期:2009-01-20 网络出版日期:2009-01-20

Preparation of Ti-Si Eutectic Brazes and its Weldability to SiC

LI Jia-Ke1,2, LIU Lei1, LIU Yi-Chun1, ZHANG Wen-Long1, HU Wen-Bin1   

  1. 1.State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; 2.School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China
  • Received:2008-03-16 Revised:2008-05-11 Published:2009-01-20 Online:2009-01-20

PDF (PC)

2071

被引次数

7 | 2

摘要： 采用海绵钛和单晶硅为原料，通过非自耗电弧熔融技术制备91.5Ti-8.5Si(wt%)和22Ti-78Si(wt%)共晶钎料.在真空中1400℃×10min条件下，研究了共钎料对SiC陶瓷的润湿性能和界面反应.结果表明：两种共晶钎料对SiC陶瓷均具有良好的润湿性能，润湿角分别约为10和25.在润湿实验后，91.5Ti-8.5Si(wt%)钎料和SiC陶瓷分离，22Ti-78Si (wt%)钎料和SiC陶瓷之间结合紧密.在润湿实验的温度制度下，用22Ti-78Si (wt%)钎料（厚度为0.2mm）对SiC陶瓷进行了初步连接，接头的抗弯强度为72MPa.采用SEM、EDS、XRD等检测手段对钎料的形貌和物相组成、钎料和SiC陶瓷的界面结合情况进行了表征，揭示了钎料对SiC陶瓷润湿性和界面反应的机理.

关键词: 共晶钎料, SiC陶瓷, 润湿, 界面反应, 微观结构

Abstract: 91.5Ti-8.5Si (wt%) and 22Ti-78Si(wt%) eutectic brazes with fine structure were prepared by means of the non-consumable arc-melting technology. Wetting behavior and interfacial reactions of two kinds of brazes on silicon carbide (SiC) were investigated by using the sessile drop method in vacuum at 1400℃ for 10min. The results indicate that two kinds of the brazes exhibit good wettability to SiC ceramic, and their contact angles are about 10°and 25°, respectively. After wetting, separation occurs between 91.5Ti-8.5Si (wt%) and SiC, but adhesion is good between 22Ti-78Si (wt%) and SiC. At wetting temperature system, bending strength of the joint of SiC/22Ti-78Si (wt%) /SiC with the braze thickness of 0.2mm, may reach 72MPa by tentative joining. Microstructure, phase composition and melting temperature of two kinds of the brazes and the interface of the brazes / SiC are examined by SEM, EDS, XRD and DSC, etc. Relationship between wettability of the brazes on SiC ceramic and interfacial reactions are investigated.

Key words: eutectic brazes, SiC ceramic, wettability, interfacial reactions, microstructure

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