Microstructure and mechanical response of the SiO2f/SiO2 composite and Invar alloy joints brazed with an AgCuTi alloy
Microstructure and mechanical response of the SiO2f/SiO2 composite and Invar alloy joints brazed with an AgCuTi alloy
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DOI：
10.1016/j.matdes.2016.08.075
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发表时间：
2016-12-05
影响因子：
8.4
通讯作者：
Feng, J. C.
中科院分区：
文献类型：
--
作者：
Sun, Z.;Zhang, L. X.;Feng, J. C.
SiO 2f/SiO2复合材料和因瓦合金使用AgCuTi合金在860 ℃下钎焊5分钟至25分钟。采用扫描电子显微镜（SEM）和能谱仪（EDS）分析了接头中的元素分布。X射线衍射（XRD）和透射电子显微镜（TEM）被用来准确地确定反应产物的种类，形貌和晶体结构。研究了保温时间对接头界面组织演变的影响。接头的剪切强度和断口形貌与整个反应层的厚度以及Ti 5Si 3 + TiO 2层与CuxTi 6-xO层的厚度比密切相关。最大剪切强度为26 MPa，在860 ℃下10分钟。最后，在关节中的反应产物的形成进行了分析，通过热力学计算。根据实验结果提出了钎焊机理。(C)2016爱思唯尔有限公司版权所有
The SiO2f/SiO2 composite and the Invar alloy were brazed at 860 degrees C from 5 min to 25 min using an AgCuTi alloy. Scanning electron microscopy(SEM) equipped with an energy dispersive spectrometer (EDS) was employed to examine the elemental distribution in the joint. X-ray diffraction (XRD) and transmission electron microscopy (TEM) was selected to accurately identify the species, morphologies and crystal structures of the reaction products. The effect of the holding time on the interfacial microstructure evolution of the joint was studied in detail. The shear strength of the joints and the fracture morphologies were closely related to the thickness of the whole reaction layer, as well as the thickness ratio of the Ti5Si3 + TiO2 layer to the CuxTi6-xO layer. The maximum shear strength was 26 MPa obtained at 860 degrees C for 10 min. Finally, the formation of the reaction products in the joint was analyzed by thermodynamic calculations. A brazing mechanism was proposed based on the experimental results. (C) 2016 Elsevier Ltd. All rights reserved.