SiC<sub>P</sub>/Al复合材料的真空扩散钎焊

刘世艳; 张丽霞; 亓钧雷; 冯吉才

SiC_P/Al复合材料的真空扩散钎焊

哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001

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- 收稿日期: 2014-11-18

Vacuum diffusion brazing of SiCp/Al composites

State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 文中采用Al/Cu/Al复合箔扩散钎焊SiC_P/Al复合材料，采用SEM，EDS，XRD分析接头界面组织，研究了钎焊温度对接头界面组织及力学性能的影响，并结合Al-Cu二元相图分析接头形成机制.结果表明，固定连接压力为1 MPa，保温时间为10 min，当钎焊温度从590℃升至640℃，接头界面产物由Al₂Cu+αAl共晶组织转变为断续的Al₂Cu金属间化合物，Al-Cu液相向两侧母材扩散的距离增加，接头的抗剪强度呈现先增大后减小的变化趋势.当钎焊温度为620℃，保温时间为10 min，连接压力为1 MPa时，接头的抗剪强度达到最大值69 MPa.
- SiC_P/Al复合材料 /
- 扩散钎焊 /
- 界面组织 /
- 抗剪强度
Abstract: Vacuum diffusion brazing of SiC particle reinforced aluminum matrix was performed with Al/Cu/Al composite foils. The microstructure of the joint was investigated by SEM, EDS and XRD. The formation mechanism of the joints was analyzed according to Al-Cu binary phase diagram. The effects of brazing temperature on the interfacial microstructure and shear strength were studied. The results shows that as the brazing temperature rise from 590℃ to 640℃, the interfacial products change from Al₂Cu+αAl eutectic structure to discontinuous Al₂Cu intermetallic compound. The diffusion distance of liquid into base materials increase and the shear strength of joints increases and then decreases with brazing parameters. When the brazing temperature is 620℃, the holding time is 10 min and the bonding pressure is 1 MPa, the shear strength of the joints is up to the maximum value of 69 MPa.
- SiC particle reinforced aluminum matrix /
- diffusion brazing /
- interface structure /
- shear strength

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参考文献(9)

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文章访问数: 514
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PDF下载量: 351
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SiCP/Al复合材料的真空扩散钎焊

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Vacuum diffusion brazing of SiCp/Al composites

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SiC_P/Al复合材料的真空扩散钎焊