Microstructure development during rapid solidification of highly supersaturated Cu-Co alloys |
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| Affiliation: | 1. Institut für Metallphysik der Universität Gottingen, Hospitalstrasse 3-7. 37073 Göttingen, Germany;2. Institute for Materials Research, GKSS-Research Center, Max-Planck-Strasse, D-21502 Geesthacht, Germany;1. College of Electrical Engineering and Information Technology, Xihua University, Chengdu 610039, PR China;2. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China;3. College of Electronic Engineering, Chongqing University of Post and Telecommunications, Chongqing 400065, PR China;1. Sakarya Üniversitesi, Fen-Edebiyat Fakültesi, Fizik Bölümü, 54187 Adapazarı, Turkey;2. School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK;1. School of Opto-Electronic Engineering (SOEE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;2. Key Laboratory for Organic Electronics & Information Displays (KLOEID), Synergetic Innovation Center for Organic Electronics and Information Displays (SICOEID), Institute of Advanced Materials (IAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;3. School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China;1. Immanuel Kant Baltic Federal University, 236016 Kaliningrad, Russia;2. Institute for Nuclear Research RAS, 117312 Moscow, Russia;3. NRC «Kurchatov Institute», 123182 Moscow, Russia;4. National Research Nuclear University MEPhI, 115409 Moscow, Russia |
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| Abstract: | We report a detailed microstructure analysis of rapidly quenched Cu1−xCox (0.1 ⩽ × ⩽ 0.5) alloys. The chemical homogeneity of the alloys was investigated on nanometer scale using a combination of AP/FIM- and TEM-studies. Cu-Co alloys with a Co concentration up to 10 at.% Co can be prepared homogeneously by rapid quenching. For larger Co contents, the microstructure is determined by a competition between polymorphic solidification, nucleation of the Co-rich solid solution from the melt, and spinodal decomposition of the unstable supersaturated solid solution. The microstructures are discussed in terms of the kinetics of the Cu-Co system, provided quantitatively by recent thermodynamic calculations. |
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