摘要
采用新型Ni基钎料连接C/C复合材料。当钎焊温度从1080℃升高至1100℃时,润湿角从23°降至14°,该钎料在C/C复合材料表面具有良好的润湿性能。焊缝由Ni固溶体和Cr_(3)C_(2)组成。随着钎焊温度的升高,大量的Cr_(3)C_(2)在连接界面处产生,并形成一定厚度的反应层。当焊接温度达到1120℃时,C/C复合材料连接接头的剪切强度达到最大值31.5MPa,其断裂路径为在靠近连接界面的C/C复合材料基体内延伸。
The novel Ni-based brazing filler was used to join C/C composites.When brazing temperature increased from 1080 to 1100°C,the wetting angle decreased from 23°to 14°,and the brazing filler had good wettability on the surface of C/C composites.The brazing seam of the brazed joint consisted of Ni(s,s)and Cr_(3)C_(2) phases.As brazing temperature increased,lots of Cr_(3)C_(2) phases were generated at the bonding interface,and the thick reaction layer was formed.When brazing temperature was 1120°C,the shear strength of C/C joint reached the maximum value of 31.5 MPa.The fracture path extended in the C/C matrix close to the bonding interface.
作者
彭赫力
张永鑫
陈旭
张宏强
薛俊良
郭伟
He-li PENG;Yong-xin ZHANG;Xu CHEN;Hong-qiang ZHANG;Jun-liang XUE;Wei GUO(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,China;Shanghai Engineering Technology Research Center of Near-net Shape Forming for Metallic Materials,Shanghai 201600,China;School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China)
基金
the financial support from the National Natural Science Foundation of China (Nos. 51675030, 51871010, 52005022)
Shanghai Aerospace Scienceand Technology Innovation Fund, China (No. SAST2020-117)。
