A low-temperature joining technology suitable for high-temperature applications developed by establishing chemical potential and supercooling gradients

Jia Yang; Wanqi Zhao; Panpan Lin; Qiuguang Zhang; Xinfei Zhang; Weihang Liu; Tiesong Lin; He Peng; Yanli Zhuang

Materials & Design (Dec 2022)

A low-temperature joining technology suitable for high-temperature applications developed by establishing chemical potential and supercooling gradients

Jia Yang,
Wanqi Zhao,
Panpan Lin,
Qiuguang Zhang,
Xinfei Zhang,
Weihang Liu,
Tiesong Lin,
He Peng,
Yanli Zhuang

Affiliations

Jia Yang: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Wanqi Zhao: AECC Shenyang Liming Aero-Engine Co., Ltd, Shenyang 110043, China
Panpan Lin: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China; Corresponding authors.
Qiuguang Zhang: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Xinfei Zhang: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Weihang Liu: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Tiesong Lin: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
He Peng: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China; Corresponding authors.
Yanli Zhuang: Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials, School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China

Journal volume & issue: Vol. 224
p. 111377

Abstract

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We designed a composite filler beginning with becoming light elements to be the main diffusing elements and (ii) controlling the diffusion of the light elements. It was achieved by establishing chemical potential and supercooling gradients and shortening the diffusion distance. As a result, a transient liquid phase bonding (TLP) composite joint with hedgehog-like reinforcements and a ductile matrix was obtained. The room-temperature (RT) shear strength of the joint produced at 460 °C for 30 min was up to 84 MPa, and it had a strength of 30 MPa at 600 °C. The hedgehog-like” reinforcements with finer or longer whiskers can provide a better load transfer effect. The progressive phase formation around NiTi was induced by the large supercooled liquid, wherein either the fastest-solidified region or the deepest-supercooled liquid served as a barrier for metallic atoms. Consequently, the lower supercooling and higher Si chemical potential in the farther region enable Si to directionally diffused towards the NiTi. This study offered a novel filler feasible for most ceramic/metal systems with the goals of low-temperature joining and high-temperature using and controllable product distribution; and this idea can be extended to develop other systems.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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