Active brazing carbon/carbon composite to TC4 with Cu and Mo composite interlayers

作者：Qin Youqiong^*; Feng Jicai

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2009, 525(1-2): 181-185.

DOI：10.1016/j.msea.2009.06.049

• C/C composite
• Brazing
• Cu and Mo composite interlayers
• Interface structure
• Strength

Active filler metal (TiZrNiCu) was used to increase the wettability and Cu and Mo composite interlayers were added to release residual stress and increase the mechanical properties of TC4-C/C composite joints. The mechanical properties of the brazed joints were measured by shear strength testing. The effects of brazing parameters on the microstructures of the brazed joint were investigated by SEM, EDS and XRD. It is shown that the maximum shear strength of the joints is 21 MPa brazed at 900 degrees C for 5 min, which is about 3 times greater than brazing alloy alone. When the brazing temperature is low, the interface structure of C/C composite/Cu brazed joint is CU/CU(51)Zr(14)/Ti(2)(Cu,Ni)+Ti(Cu,Ni)+TiCu+Cu(2)TiZr/(Ti,Zr)C/C/C composite. With the increased brazing temperature, Ti(2)(Cu,Ni), Ti(Cu,Ni), TiCu and Cu(2)TiZr reaction phases disappear. Cu(s.s) and Ti(Cu,Ni)2 appear. The thicknesses of Cu(51)Zr(14) and (Ti,Zr)C reaction layers increase. When the brazing temperature is high, the interface structure change to Cu/Cu(51)Zr(14)/Cu(s.s) +Ti(Cu,Ni)(2)/(Ti,Zr)C/C/C composite.

• 出版日期2009-11-15
• 单位上海工程技术大学