SiCf/SiC复合材料与镍基高温合金钎焊接头的组织及性能

doi:10.3901/JME.2021.12.161

机械工程学报 ›› 2021, Vol. 57 ›› Issue (12): 161-168.doi: 10.3901/JME.2021.12.161

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SiC_f/SiC复合材料与镍基高温合金钎焊接头的组织及性能

杨佳¹, 张勋业¹, 马广璐², 林盼盼¹, 徐彦强², 林铁松^1,3, 何鹏¹

1. 哈尔滨工业大学先进焊接与焊接国家重点实验室哈尔滨 150001;
2. 中国航发沈阳黎明航空发动机有限责任公司沈阳 110043;
3. 哈尔滨工业大学特种陶瓷研究所哈尔滨 150080

收稿日期:2020-10-07 修回日期:2021-03-05 出版日期:2021-08-31 发布日期:2021-08-31
通讯作者: 林盼盼(通信作者),女,1987年出生,博士,讲师。主要研究方向为新材料及异种材料连接。E-mail:pplin@hit.edu.cn
作者简介:杨佳,女,1996年出生。主要研究方向为新材料及异种材料连接。E-mail:1257606586@qq.com
基金资助:
国家磁约束核聚变能发展研究专项（2019YFE03100100）、国家自然科学基金（51805112，51974101，51975150）、装备预研领域基金（61409230512）、黑龙江省自然科学基金（LH2020E037）和山东省重大科技创新工程（2019JZZY010366）资助项目

Microstructure and Properties of Brazed Joint Between SiC_f/SiC Composite and Ni-based Superalloy

YANG Jia¹, ZHANG Xunye¹, MA Guanglu², LIN Panpan¹, XU Yanqiang², LIN Tiesong^1,3, HE Peng¹

1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001;
2. AECC Shenyang Liming Aero-Engine Co., Ltd, Shenyang 110043;
3. Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150080

Received:2020-10-07 Revised:2021-03-05 Online:2021-08-31 Published:2021-08-31

摘要/Abstract

摘要： 针对新型耐高温复合材料（SiC_f/SiC）的加工性差的问题，采用AuCuTi/Mo/AuCuTi复合钎料对其与镍基高温合金进行钎焊研究。通过探究不同温度下的接头力学性能及组织演变规律，对界面反应和应力缓释机理进行分析。在1 050℃/10 min的工艺参数下，接头室温剪切强度最高达到79 MPa。接头典型的界面结构为GH536/（Ni，Cr，Mo，Fe）+TiNi₃+Ti₂Ni+AuCu_I/TiNi₃+Ti₂Ni+TiNi+AuCu_I/σ/Mo/Mo_4.8Si₃C_0.6/Ti₅Si₃C_x/Ti₅Si₃C_x+TiC+AuCu_I/Ti₃SiC₂/SiC_f/SiC。当温度较低时，界面反应程度较低，因此陶瓷/钎料异质界面难以形成连续的Ti₅Si₃C_x+TiC连接层；而当钎焊温度增加到1 050℃时，异质界面处开始形成厚度约为3 μm的Ti₃SiC₂，从而实现有效地连接。当温度继续升高到1 100℃时，Cr元素在Mo箔中的扩散程度增加，并在陶瓷/钎料异质界面处发生富集。而此时过厚的界面反应层（10 μm）则是引起接头剪切降低的主要原因。使用该钎焊体系有助于阻碍母材之间的剧烈反应以及缓解接头的热应力，在一定程度上改善了SiC_f/SiC在实际应用中的加工困难问题。

关键词: SiC_f/SiC复合材料, GH536, Mo中间层, 微观组织, 力学性能

Abstract: Aiming at the poor workability of the novel high-temperature-resistant composites(SiC_f/SiC), the brazing of SiC_f/SiC and a Ni-base superalloy is studied. The mechanical properties and microstructural evolution of joints at different temperatures are studied, and the corresponding mechanism is clarified. Under the process parameters of 1 050℃/10 min, the room temperature shear strength of the joint reaches 79 MPa. The typical interface structure of the joint was GH536/(Ni, Cr, Mo, Fe)+TiNi₃+Ti₂Ni+AuCu_I/TiNi₃+Ti₂Ni+TiNi+AuCu_I/σ/Mo/Mo_4.8Si₃C_0.6/Ti₅Si₃C_x/Ti₅Si₃C_x+TiC+AuCu_I/Ti₃SiC₂/SiC_f/SiC. When the temperature is low, the interface reactions are limited. Therefore, it is difficult to form a continuous connection Ti₅Si₃C_x+TiC layer at the ceramic/braze heterogeneous interface. When the brazing temperature increases to 1 050℃, a 3 μm layer of Ti₃SiC₂ newly forms at the heterogeneous interface to achieve efficient connection. When the temperature continues to rise to 1 100℃, the diffusion of Cr element in Mo foil increases, and an enrichment of Cr occurs at the heterogeneous interface of ceramic/braze. Currently, the excessively thick interfacial reaction layer(10 μm)is the main reason for the reduction of joint shear strength. The use of this brazing system helps to hinder the violent reactions between the base materials and relieve the thermal stress of the joint, which reduces the processing difficulty of SiC_f/SiC in practical applications.

Key words: SiC_f/SiC composites, GH536, Mo interlayer, microstructure, mechanical properties

中图分类号:

TG425

杨佳, 张勋业, 马广璐, 林盼盼, 徐彦强, 林铁松, 何鹏. SiC_f/SiC复合材料与镍基高温合金钎焊接头的组织及性能[J]. 机械工程学报, 2021, 57(12): 161-168.

YANG Jia, ZHANG Xunye, MA Guanglu, LIN Panpan, XU Yanqiang, LIN Tiesong, HE Peng. Microstructure and Properties of Brazed Joint Between SiC_f/SiC Composite and Ni-based Superalloy[J]. Journal of Mechanical Engineering, 2021, 57(12): 161-168.

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SiC_f/SiC复合材料与镍基高温合金钎焊接头的组织及性能

Microstructure and Properties of Brazed Joint Between SiC_f/SiC Composite and Ni-based Superalloy

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SiCf/SiC复合材料与镍基高温合金钎焊接头的组织及性能

Microstructure and Properties of Brazed Joint Between SiCf/SiC Composite and Ni-based Superalloy

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SiC_f/SiC复合材料与镍基高温合金钎焊接头的组织及性能

Microstructure and Properties of Brazed Joint Between SiC_f/SiC Composite and Ni-based Superalloy