Microstructure and Properties of Si3N4 Ceramics and 304 Stainless Steel Brazed Joint with Cu/Ag-Cu/Ti Laminated Filler Metal
Microstructure and Properties of Si3N4 Ceramics and 304 Stainless Steel Brazed Joint with Cu/Ag-Cu/Ti Laminated Filler Metal
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DOI：
10.1515/htmp-2016-0183
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发表时间：
2018-06
影响因子：
1.5
通讯作者：
X. P. Xu;Q. M. Liu;C. Xia;J. Zou
中科院分区：
文献类型：
--
作者：
X. P. Xu;Q. M. Liu;C. Xia;J. Zou
采用Cu/Ag-Cu/Ti层状钎料对Si 3 N4陶瓷与304不锈钢进行了连接。研究了钎焊接头的界面组织以及钎焊温度和铜箔厚度对接头力学性能的影响。结果表明，钎焊接头界面组织为304不锈钢/TiFe 2/Ag-Cu共晶+Cu（s，s）/Cu（s，s）/Cu（s，s）+Ag-Cu共晶/Cu 3 Ti +TiN/Si 3 N4陶瓷。随着钎焊温度的升高，钎焊接头的四点弯曲强度先增大后减小。当铜箔厚度为500 μm时，抗弯强度在1153 K时达到最大值53 MPa。在钎焊温度为1153 K时，采用1 mm厚的Cu中间层，接头的抗弯强度达到最大值57 MPa。
Abstract Si3N4 ceramics and 304 stainless steel were joined by the Cu/Ag-Cu/Ti laminated filler metal. Interfacial microstructure of brazed joint and effect of brazing temperature and thickness of Cu foil on mechanical properties were studied in this paper. Research results showed that the interfacial microstructure of the brazed joint might be 304 stainless steel/TiFe2/Ag-Cu eutectic+Cu(s,s)/Cu(s,s)/Cu(s,s)+Ag-Cu eutectic/Cu3Ti+TiN/Si3N4 ceramics. With the increasing of the brazing temperature, four-point bending strength of the brazed joint initially increased, then decreased. The bending strength reached the maximum value of 53 MPa at 1153 K when the thickness of Cu foil was 500 μm. The bending strength reached the maximum value of 57 MPa with 1 mm thickness Cu interlayer under the brazing temperature of 1153 K.