连接温度对铝空气钎焊工艺连接SiC接头结构与性能的影响
Effect of Joining Temperature on Microstructure and Properties of SiC Joints by Air Brazing Process with Al
吴利翔 1薛佳祥 1翟剑晗 1刘洋 1马海滨 1任啟森 1廖业宏 1郭伟明 2林华泰2
作者信息
- 1. 中广核研究院有限公司核燃料与材料研究所,广东 深圳 518026
- 2. 广东工业大学 机电工程学院,广东 广州 510006
- 折叠
摘要
采用金属Al箔作为连接材料,探究空气气氛下连接温度对SiC陶瓷连接接头结构和性能的影响.结果表明,1000℃连接时金属Al的过量流失会导致SiC接头连接层孔洞缺陷的产生;保持热处理工艺不变,将连接温度降低至 900℃,不仅可避免连接层气孔缺陷的产生,而且可有效促进中间层Al单质向Al2O3 的完全转化,相比于 1000℃连接的SiC接头,其室温剪切强度从(22.0±5.4)MPa提高到(117.0±18.7)MPa.
Abstract
The effect of the joining temperature on the microstructure and properties of the SiC joint joined by using Al foil as an interlayer under air atmosphere was investigated.The results show that the loss of metal Al at the high temperature of 1000℃can cause the formation of pores in the interlayer of the SiC joint.Under the same heating treatment process,reducing the joining temperature to 900℃can not only avoid the generation of pores defects in the connection layer,but also can effectively promote the complete conversion of the middle layer Al to Al2O3.Compared with the SiC joint joined at 1000℃,the room temperature shear strength of the SiC joint joined at 900℃is improved from(22.0±5.4)MPa to(117.0±18.7)MPa.
关键词
碳化硅/钎焊/连接温度/显微结构/剪切强度Key words
silicon carbide/brazing/joining temperature/microstructure/shear strength引用本文复制引用
基金项目
广东省自然科学基金面上项目(2022A1515010735)
中国博士后科学基金面上基金项目(2021M703024)
出版年
2024
NETL
NSTL
万方数据