Synthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanisms
Abstract Highly pure Al4SiC4 powders were prepared by carbothermic reduction at 2173 K using Al2O3, SiO2, and graphite as raw materials. The obtained Al4SiC4 powders owned hexagonal plate-like grains with a diameter of about 200–300 μm and a thickness of about 2–6 μm. Based on the experimental resul...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2017-12-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s40145-017-0247-z |
| _version_ | 1827841854841815040 |
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| author | Xinming Xing Junhong Chen Guoping Bei Bin Li Kuo-Chih Chou Xinmei Hou |
| author_facet | Xinming Xing Junhong Chen Guoping Bei Bin Li Kuo-Chih Chou Xinmei Hou |
| author_sort | Xinming Xing |
| collection | DOAJ |
| description | Abstract Highly pure Al4SiC4 powders were prepared by carbothermic reduction at 2173 K using Al2O3, SiO2, and graphite as raw materials. The obtained Al4SiC4 powders owned hexagonal plate-like grains with a diameter of about 200–300 μm and a thickness of about 2–6 μm. Based on the experimental results, the reaction of Al4SiC4 formation and grain evolution mechanisms were determined from thermodynamic and first-principles calculations. The results indicated that the synthesis of Al4SiC4 by the carbothermic reduction consisted of two parts, i.e., solid–solid reactions initially followed by complex gas–solid and gas–gas reactions. The grain growth mechanism of Al4SiC4 featured a two-dimensional nucleation and growth mechanism. The gas phases formed during the sintering process favored the preferential grain growth of (0010) and (1 ī0) planes resulting in formation of hexagonal plate-like Al4SiC4 grains. |
| first_indexed | 2024-03-12T07:59:36Z |
| format | Article |
| id | doaj.art-1cc72d26886e4662b6bcbe1db62848c7 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T07:59:36Z |
| publishDate | 2017-12-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-1cc72d26886e4662b6bcbe1db62848c72023-09-02T19:57:50ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082017-12-016435135910.1007/s40145-017-0247-zSynthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanismsXinming Xing0Junhong Chen1Guoping Bei2Bin Li3Kuo-Chih Chou4Xinmei Hou5School of Material Science and Technology, University of Science and Technology BeijingSchool of Material Science and Technology, University of Science and Technology BeijingDepartment of Materials Science and Engineering, 3ME, Delft University of TechnologyState Key Laboratory of Advanced Metallurgy, University of Science and Technology BeijingState Key Laboratory of Advanced Metallurgy, University of Science and Technology BeijingState Key Laboratory of Advanced Metallurgy, University of Science and Technology BeijingAbstract Highly pure Al4SiC4 powders were prepared by carbothermic reduction at 2173 K using Al2O3, SiO2, and graphite as raw materials. The obtained Al4SiC4 powders owned hexagonal plate-like grains with a diameter of about 200–300 μm and a thickness of about 2–6 μm. Based on the experimental results, the reaction of Al4SiC4 formation and grain evolution mechanisms were determined from thermodynamic and first-principles calculations. The results indicated that the synthesis of Al4SiC4 by the carbothermic reduction consisted of two parts, i.e., solid–solid reactions initially followed by complex gas–solid and gas–gas reactions. The grain growth mechanism of Al4SiC4 featured a two-dimensional nucleation and growth mechanism. The gas phases formed during the sintering process favored the preferential grain growth of (0010) and (1 ī0) planes resulting in formation of hexagonal plate-like Al4SiC4 grains.http://link.springer.com/article/10.1007/s40145-017-0247-zAl4SiC4carbothermic reductionhexagonal plate-likegrowth mechanism |
| spellingShingle | Xinming Xing Junhong Chen Guoping Bei Bin Li Kuo-Chih Chou Xinmei Hou Synthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanisms Journal of Advanced Ceramics Al4SiC4 carbothermic reduction hexagonal plate-like growth mechanism |
| title | Synthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanisms |
| title_full | Synthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanisms |
| title_fullStr | Synthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanisms |
| title_full_unstemmed | Synthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanisms |
| title_short | Synthesis of Al4SiC4 powders via carbothermic reduction: Reaction and grain growth mechanisms |
| title_sort | synthesis of al4sic4 powders via carbothermic reduction reaction and grain growth mechanisms |
| topic | Al4SiC4 carbothermic reduction hexagonal plate-like growth mechanism |
| url | http://link.springer.com/article/10.1007/s40145-017-0247-z |
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