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1. Passivation of Cu-Rh Alloys

   https://doi.org/10.1149/1945-7111/ac0f60  

   Xie, Yusi ; Chatterjee, Swarnendu ; Liu, Ling-Zhi ; Jin, Hai-Jun ; Sieradzki, Karl ( July 2021 , Journal of The Electrochemical Society)

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2. Temperature dependence of spin-orbit torques in Cu-Au alloys

   https://doi.org/10.1103/PhysRevB.95.104403  

   Wen, Yan ; Wu, Jun ; Li, Peng ; Zhang, Qiang ; Zhao, Yuelei ; Manchon, Aurelien ; Xiao, John Q. ; Zhang, Xixiang ( March 2017 , Physical Review B)
3. Nucleation and growth of discontinuous precipitates in Cu–Ag alloys

   https://doi.org/10.1088/2053-1591/ac5775  

   An, Bailing ; Xin, Yan ; Niu, Rongmei ; Xiang, Zhaolong ; Wang, Engang ; Han, Ke ( March 2022 , Materials Research Express)

   To study discontinuous precipitation, which is an important method for strengthening materials, we observed the nucleation and growth of discontinuous precipitates in Cu–Ag alloys using electron backscatter diffraction and scanning transmission electron microscopy. We found that discontinuous precipitation always started with Ag precipitates, which nucleated on Cu grain boundaries. These precipitates then each took the shape of a large, abutted cone that shared a semi-coherent interface with one of the Cu grains, topped by a small spherical cap that shared an incoherent interface with the Cu grain on the opposite side of the boundary. This formation created a difference between the levels of interface energy on each side of boundary. We assume that this difference and boundary curvature together generates the driving force necessary to push grain boundary migration, thus triggering discontinuous precipitation. Because of grain boundary migration, Ag solute was consumed at one side of the grain, which causes a solute difference. The difference produces mainly driving force, pushing the boundaries to migrate forward.

    

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4. Charge-State Field Evaporation Behavior in Cu(V) Nanocrystalline Alloys

   https://doi.org/10.1017/S1431927618016288  

   Zhou, Xuyang ; Thompson, Gregory B. ( April 2019 , Microscopy and Microanalysis)

   Abstract Atom probe tomography (APT) of a nanocrystalline Cu–7 at.% V thin film annealed at 400°C for 1 h revealed chemical partitioning in the form of solute segregation. The vanadium precipitated along high angle grain boundaries and at triple junctions, determined by cross-correlative precession electron diffraction of the APT specimen. Upon field evaporation, the V 2+ /(V 1+ + VH 1+ ) ratio from the decomposed ions was ~3 within the matrix grains and ~16 within the vanadium precipitates. It was found that the VH 1+ complex was prevalent in the matrix, with its presence explained in terms of hydrogen's ability to assist in field evaporation. The change in the V 2+ /(V 1+ + VH 1+ ) charge-state ratio (CSR) was studied as a function of base temperature (25–90 K), laser pulse energy (50–200 pJ), and grain orientation. The strongest influence on changing the CSR was with the varied pulse laser, which made the CSR between the precipitates and the matrix equivalent at the higher laser pulse energies. However, at these conditions, the precipitates began to coarsen. The collective results of the CSRs are discussed in terms of field strengths related to the chemical coordination. 

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5. Atomistic modeling of capillary-driven grain boundary motion in Cu-Ta alloys

   https://doi.org/10.1016/j.actamat.2018.01.027  

   Koju, R.K. ; Darling, K.A. ; Solanki, K.N. ; Mishin, Y. ( April 2018 , Acta Materialia)