A kinetic model for the field-activated synthesis of MoSi2/SiC composites: simulation of SPS conditions |
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| Affiliation: | 1. Materials Science and Engineering, Indian Institute of Technology Patna, Bihta Kanpa Road, Bihta, Patna, Bihar 801103, India;2. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India;1. Maharaja Agrasen Institute of Technology, Rohini, Delhi 110086, India;2. Delhi Technological University, Bawana, Delhi 110042, India;1. Institute of Materials Research, Slovak Academy of Sciences, Division of Ceramic and Non-Metallic Systems, Watsonova 47, 040 01 Košice, Slovak Republic;2. Pavol Jozef Šafárik University in Košice, Faculty of Science, Institute of Physics, Department of Condensed Matter Physics, Park Angelinum 9, 040 01 Košice, Slovak Republic;3. AGH University of Science and Technology in Krakow, Faculty of Materials Science and Ceramics, Department of Ceramics and Refractories, al. A. Mickiewicza 30, 30-059 Krakow, Poland;4. Centre for Materials Research and Sintering Technology, Institute of Advanced Manufacturing Technology, Krakow, 30–011, Poland;5. Donát Bánki Faculty of Mechanical and Safety Engineering, Óbuda University, Népszínház utca 8, 1081 Budapest, Hungary;1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, PR China;2. National Key Laboratory of Science and Technology on Material under Shock and Impact, Beijing, 100081, China |
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| Abstract: | A modeling study was carried out to simulate the direct synthesis of MoSi2–SiC composites from the elements using field activation. The study was made to simulate the experimental process of spark plasma synthesis (SPS), which has been utilized previously to simultaneously synthesize and densify materials, including nanophases. The results show a temporal dependence for the formation of the two products. The dependence of the reaction wave dynamics on composition was also investigated. A transition from volume combustion, in which the reactants are converted instantly to the products throughout the entire sample, to a wavelike reaction, in which the conversion front traverses the sample in a finite time, is shown to depend on sample size and product. Conversion fronts traverse the sample as concentric waves propagating outward or inward depending on the composition of the composite and on the die conductivity. |
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