The effect mechanism of Zn, Ni and Mn solute elements on the WC/Cu-based filler metal interfacial properties: first-principles calculations and experiments

Journal of Materials Research and Technology

Jingpei Xie¹  Pei Liu²  Zhenwei Liu³  Aiqin Wang³ 

[1] Corresponding author.;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang 471023, PR China;College of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China;

关键词: First-principles calculation;    WC/Cu interface;    Atomic doping;    Adhesive work;    Electronic structure;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this work, the first-principles calculation was performed to investigate the effect mechanism of Zn, Ni and Mn solute elements on the WC/Cu-based filler metal interfacial properties, and the CuZnNiMn filler metal was designed, the diffusion behavior of interface elements was verified by experiments. Firstly, Zn, Ni and Mn element doping WC/Cu interface models were established respectively. The effect natures of alloying elements on the interfacial properties were explored by adhesive strength and interfacial electronic structure. The results show that Zn element slightly aggregate into the Cu matrix interior after full relaxation, which has little effect on the interface structure, but it can lower the melting point and optimize the properties of Cu-based filler metals. Ni, Mn elements tend to segregate toward the interface and form strong covalent bonds and metallic bonds with W atoms, which can significantly improve the interfacial bonding strength of WC/Cu. The Energy Dispersive Spectroscopy (EDS) analysis of the WC/CuZnNiMn interface region proves that the diffusion effect of Zn in the interface is not obvious, while the Ni and Mn elements strongly diffuse into the WC particle, which has a positive effect on the metallurgical bonding of the brazed joint.

【 授权许可】

Unknown