SiCf/SiC复合材料与钴基高温合金的铜基复合钎料钎焊工艺研究

doi:10.3901/JME.2025.11.437

机械工程学报 ›› 2025, Vol. 61 ›› Issue (21): 437-445.doi: 10.3901/JME.2025.11.437

• 特邀专栏：纪念张启先院士诞辰 100 周年 • 上一篇

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SiC_f/SiC复合材料与钴基高温合金的铜基复合钎料钎焊工艺研究

杨佳¹, 张守壮¹, 鲁旋¹, 徐新¹, 王策¹, 林盼盼¹, 梅寒², 刘悦², 何鹏¹, 林铁松¹

1. 哈尔滨工业大学材料结构精密焊接与连接全国重点实验室哈尔滨 150001;
2. 中国航发沈阳黎明航空发动机有限责任公司沈阳 110043

收稿日期:2024-12-03 修回日期:2025-05-04 发布日期:2025-12-27
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
林盼盼(通信作者)，女，1987年出生，博士，教授，博士研究生导师。主要研究方向为新材料及异种材料连接。E-mail：pplin@hit.edu.cn
基金资助:
国家自然科学基金(52175302，U21A20128，U22A20185)、国家磁约束核聚变能发展研究专项(2019YFE03100100)和中央高校基本科研业务费专项资金(2022FRFK060009)资助项目。

Study of Copper-based Composite Brazing Process of SiC_f/SiC Composites with Cobalt-based High Temperature Alloys

YANG Jia¹, ZHANG Shouzhuang¹, LU Xuan¹, XU Xin¹, WANG Ce¹, LIN Panpan¹, MEI Han², LIU Yue², HE Peng¹, LIN Tiesong¹

1. State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001;
2. AECC Shenyang Liming Aero-engine Co. Ltd., Shenyang 110043

Received:2024-12-03 Revised:2025-05-04 Published:2025-12-27

摘要/Abstract

摘要： 针对SiC_f/SiC复合材料与钴基高温合金连接中存在的应力大及界面反应难控制的问题，制备了CuTi+NbB₂复合钎料并探究了Ti含量、NbB₂含量对接头界面微观组织以及力学性能的影响规律，最终实现了SiC_f/SiC复合材料与钴基高温合金的成功连接。接头典型组织为GH5188/Cu+(Co, Ni, Cu)Ti₂+TiC_0.5/Cu+(Ni, Co, Cu)Ti+(Co, Ni, Cu)TiSi+TiC_0.5/TiC_0.5+Cr₂C₃/ SiC+Cu/SiC_f/SiC。随着Ti含量的增加，母材反应程度加剧，界面主要产物由碳化物转变为硅-钛-镍三元相。而随着NbB₂含量的增加，金属侧钎料区的厚度也明显减小，而陶瓷侧钎料区的厚度有明显增加，焊缝产物逐渐从CoTi₂转变为CoTi(Si)相。NbB₂第二相作为形核点使得反应相在钎缝中的分布也更为均匀，而非富集在界面处；同时有限元结果也表明其存在能够有效地降低接头的残余应力。接头在1 050 ℃/10 min，0.1 wt% NbB₂的条件下获得了最优的接头强度，其值达到72 MPa，强度是不加NbB₂的1.2倍。陶瓷侧断口主要分为两个区域：填充区域以及TiC_0.5、Cu-C反应层失效而带来的断裂区域。通过陶瓷颗粒增强的方式设计了复合铜基钎料，首次实现了SiC_f/SiC复合材料与钴基高温合金的可靠连接并明晰了相关机制，为后续航空发动机热端部件的研发与制造提供了理论基础。

关键词: 碳化硅连续纤维增强碳化硅, 钴基高温合金, 真空钎焊, 界面组织, 力学性能

Abstract: For the problems of high stress and difficult-to-control interface reaction in the joining of SiC_f/SiC composites and cobalt-based high-temperature alloys, CuTi+NbB₂ composite brazing material is prepared and the effects of Ti content and NbB₂ content on the interface microstructure and mechanical properties of the joints are investigated, and the successful joining of SiC_f/SiC composites and cobalt-based high-temperature alloys is finally realized. The typical microstructure of the joint is GH5188/Cu+(Co, Ni, Cu)Ti₂+TiC_0.5/Cu+(Ni, Co, Cu)Ti+(Co, Ni, Cu)TiSi+TiC_0.5/TiC_0.5+Cr₂C₃/SiC+Cu/SiC_f/SiC. With the increase of the Ti content, the reaction of the base material is intensified, and the main products at the interface are transformed from carbides to Si-Ti-Ni ternary phase. With the increase of NbB₂ content, the thickness of metal-side brazing area is also significantly reduced, while the thickness of ceramic-side brazing area had a significant increase, and the product gradually transformed from CoTi₂ to CoTi(Si) phase. NbB₂ as the nucleation point made the distribution of reactive phases in the braze seam is more uniform rather than enriched in the interface; meanwhile, the finite element results also showed that its presence can effectively reduce the residual stress of the joints. The optimum joint strength is obtained at 1 050 ℃/10 min with 0.1 wt% NbB₂, reaching a value of 72 MPa, which is 1.2 times stronger than that without NbB₂. The ceramic side fracture is divided into two main regions: the seam region and the TiC_0.5 and Cu-C reaction layer. The composite copper-based brazing material is designed by adding ceramic particle reinforcement, and thus the reliable joining between SiC_f/SiC composites and cobalt-based high-temperature alloys is realized for the first time and the related mechanism is clarified, which provided a theoretical basis for the development and manufacture of the subsequent aero-engine hot-end components.

Key words: continuous fiber reinforced silicon carbide, cobalt-based high-temperature alloys, vacuum brazing, interfacial microstructure, mechanical properties

中图分类号:

TB33
TG454

杨佳, 张守壮, 鲁旋, 徐新, 王策, 林盼盼, 梅寒, 刘悦, 何鹏, 林铁松. SiC_f/SiC复合材料与钴基高温合金的铜基复合钎料钎焊工艺研究[J]. 机械工程学报, 2025, 61(21): 437-445.

YANG Jia, ZHANG Shouzhuang, LU Xuan, XU Xin, WANG Ce, LIN Panpan, MEI Han, LIU Yue, HE Peng, LIN Tiesong. Study of Copper-based Composite Brazing Process of SiC_f/SiC Composites with Cobalt-based High Temperature Alloys[J]. Journal of Mechanical Engineering, 2025, 61(21): 437-445.

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SiC_f/SiC复合材料与钴基高温合金的铜基复合钎料钎焊工艺研究

Study of Copper-based Composite Brazing Process of SiC_f/SiC Composites with Cobalt-based High Temperature Alloys

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SiCf/SiC复合材料与钴基高温合金的铜基复合钎料钎焊工艺研究

Study of Copper-based Composite Brazing Process of SiCf/SiC Composites with Cobalt-based High Temperature Alloys

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SiC_f/SiC复合材料与钴基高温合金的铜基复合钎料钎焊工艺研究

Study of Copper-based Composite Brazing Process of SiC_f/SiC Composites with Cobalt-based High Temperature Alloys