Influence of the Ni/Co Mass Ratio on the Microstructure and Properties of Quaternary Cu-Ni-Co-Si Alloys
1
State Key laboratory of Nonferrous Metals and Processes, GRIMAT Engineering Institute Co., Ltd., Beijing 101417, China
2
School of Materials Science and Engineering, University of Science & Technology Beijing, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Materials 2019, 12(18), 2855; https://doi.org/10.3390/ma12182855
Received: 21 August 2019 / Revised: 1 September 2019 / Accepted: 3 September 2019 / Published: 4 September 2019
The properties and microstructural evolution of quaternary Cu-Ni-Co-Si alloys with different Ni/Co mass ratios are investigated systematically. These alloys exhibit higher mechanical properties when the Ni/Co mass ratio is 1.12-1.95 (NC-4-NC-5) and show excellent electrical conductivity when the Ni/Co mass ratio is 0.05-0.5 (NC-1-NC-3). With an increase in the Ni/Co ratio, the dimension of precipitated phase continues to increase and the grain size also visibly grows and coarsens. At the same time, the precipitation process of the NC-5 alloy is the most adequate, resulting in the highest mechanical properties. In addition, the precipitated phase in the alloys was confirmed to be the (Ni, Co)2Si composite phase. The number of Ni2Si phases in the precipitated phase gradually increased, and the Ni atoms exhibited the strongest co-segregation alongside the increasing Ni/Co ratio. Compared with the alloy without a Co element, the addition of Co helped refine the grain size and accelerate the precipitation of the particle phase and purify solute atoms in the matrix, thereby simultaneously improving mechanical properties and conductivity. The present work provides a new method for the development of multicomponent Cu-Ni-Si-Co-X alloys with outstanding comprehensive performance.
View Full-Text
Keywords:
Cu-Ni-Co-Si alloy; Ni/Co mass ratio; physical properties; microstructure; atomic distribution
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Li, J.; Huang, G.; Mi, X.; Peng, L.; Xie, H.; Kang, Y. Influence of the Ni/Co Mass Ratio on the Microstructure and Properties of Quaternary Cu-Ni-Co-Si Alloys. Materials 2019, 12, 2855. https://doi.org/10.3390/ma12182855
AMA Style
Li J, Huang G, Mi X, Peng L, Xie H, Kang Y. Influence of the Ni/Co Mass Ratio on the Microstructure and Properties of Quaternary Cu-Ni-Co-Si Alloys. Materials. 2019; 12(18):2855. https://doi.org/10.3390/ma12182855
Chicago/Turabian StyleLi, Jiang; Huang, Guojie; Mi, Xujun; Peng, Lijun; Xie, Haofeng; Kang, Yonglin. 2019. "Influence of the Ni/Co Mass Ratio on the Microstructure and Properties of Quaternary Cu-Ni-Co-Si Alloys" Materials 12, no. 18: 2855. https://doi.org/10.3390/ma12182855
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
Search more from Scilit
