Experimental investigation and thermodynamic calculation of the Mg–Mn–Ni system |
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| Affiliation: | 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, PR China;2. Sino-German cooperation group “Microstructure in Al alloys”, Central South University, Changsha, Hunan 410083, PR China;1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;2. Computational Alloy Design Group, IMDEA Materials Institute, Madrid 28040, Spain;1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, PR China;2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, PR China;1. Escola Politécnica da Universidade de São Paulo, Metallurgical and Materials Engineering Department. Av. Prof. Mello Morais, 2463, CEP 05508-030 São Paulo – SP, Brazil;2. Instituto de Física da Universidade de São Paulo, CP 66318, 05315-970 São Paulo – SP, Brazil;3. Escola de Engenharia de Lorena da Universidade de São Paulo, Materials Engineering Department, Lorena – SP, Brasil;1. Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada;2. Aluminium Research Centre-REGAL, McGill University, Montreal, Quebec H3A 0C5, Canada;3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, PR China |
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| Abstract: | Based on the critical review of the ternary Mg–Mn–Ni system, 12 alloys were prepared using a powder metallurgy method in a glove box. The isothermal section of the Mg–Mn–Ni system at 400 °C was determined. Ternary compound τ (Mg3MnNi2) was confirmed in the present work. In order to obtain the phase transition temperatures, differential scanning calorimetry (DSC) was applied to the selected alloys using sealed Ta crucibles. The invariant reaction temperatures for two invariant reactions in the Mg-rich corner were measured. Considering the experimental data from present work and literature, the Mg–Mn–Ni system was optimized and a set of thermodynamic parameters was obtained. Calculated results fit well with the experimental data. |
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| Keywords: | Mg–Mn–Ni alloys Phase diagram CALPHAD Hydrogen storage materials |
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