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Joints of continuous carbon fiber reinforced lithium aluminosilicate glass ceramics matrix composites to Ti60 alloy brazed using Ti-Zr-Ni-Cu active alloy

查看全文 作　　者：Shengpeng [1]HU;Dongdong [1]FENG;Long [1]XIA;Ke [2]WANG;Renwei [2]LIU;Zhentao [2]XIA;Hongwei [1]NIU;Xiaoguo [1]SONG 高影响力作者 机构地区：[1]School of Materials Science and Engineering, Harbin Institute of Technology;[2]Shanghai Institute of Spacecraft Equipment高影响力机构 出　　处：《Chinese Journal of Aeronautics》索引2019年第32卷第3期,共8页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(51172050,51102060,51302050,and U1737205);the Natural Scientific Research Innovation Foundation at Harbin Institute of Technology(HIT.NSRIF.2014129);the Shanghai Sailing Program of China(16YF1411100);the China Aerospace Science and Technology Corporation Aerospace Science and Technology Innovation Fund of China 摘　　要：Continuous carbon fiber reinforced lithium aluminosilicate glass ceramics matrix composites(C_f/LAS composites) are joined to Ti60 alloy vacuum brazed using Ti-Zr-Ni-Cu brazing alloy. The effects of the brazing temperature on the interfacial microstructure and mechanical properties of brazed joints are investigated in details. The interfacial microstructure varies apparently with an increase of the brazing temperature. The thicknesses of the banded Ti solid solution(Ti(s, s)) and the reactive layer between Cf/LAS composites and the interlayer grow gradually. The mechanical properties of brazed joints increase firstly and then decrease with an increasing temperature. In addition, a joint that is brazed at 980 °C for 10 min shows the highest shear strength of$38.13 MPa. At the same time, the fracture paths of brazed joints also change as the temperature increases. When the brazing temperature is 950 °C, the fracture position is in the TiC + ZrC +Ti_2O + ZrSi_2+ Ti_5Si_3 layer on the composite side. When the brazing temperature is 980 °C, the fracture position is on the side of the braze seam(Ti, Zr)2(Ni, Cu), Ti_2O + ZrSi_2+ Ti_5Si_3 layer,and carbon fiber in the composite material. When the brazing temperature is 990 °C, the fracture position is in the Ti_2O + ZrSi_2+ Ti_5Si_3 layer on the composite side and the carbon fiber in the composite material. 关 键 词：BRAZING Composites Mechanical properties Microstructure TITANIUM alloys
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