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Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC
Al-Ti-C master alloys have been widely investigated by various researchers. However, their refining effectiveness is still severely compromised by the preparation process. In this work, the aluminum melt in-situ reaction was carried out to synthesize the Al-5Ti-0.62C, and its refining performance wa...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013678/ https://www.ncbi.nlm.nih.gov/pubmed/31936643 http://dx.doi.org/10.3390/ma13020310 |
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author | Ding, Wanwu Chen, Taili Zhao, Xiaoyan Cheng, Yan Liu, Xiaoxiong Gou, Lumin |
author_facet | Ding, Wanwu Chen, Taili Zhao, Xiaoyan Cheng, Yan Liu, Xiaoxiong Gou, Lumin |
author_sort | Ding, Wanwu |
collection | PubMed |
description | Al-Ti-C master alloys have been widely investigated by various researchers. However, their refining effectiveness is still severely compromised by the preparation process. In this work, the aluminum melt in-situ reaction was carried out to synthesize the Al-5Ti-0.62C, and its refining performance was estimated. The thermodynamics calculation and differential scanning calorimeter experiment were used to investigate the synthesis mechanism of TiC. Quenching experiment was conducted to explore phase and microstructure transformation of the Al-5Ti-0.62C system. The results show that the main phases of Al-5Ti-0.62C master alloys are α-Al, Al(3)Ti, and TiC and it has a positive effect on commercial pure aluminum refining. Commercial pure aluminum is completely refined into the fine equiaxed structure by adding 0.3% Al-5Ti-0.62C master alloy. TiC particles mainly distribute in the grain interior and grain boundaries. The excess Ti came from the dissolution of Al(3)Ti spreading around TiC and finally forming the Ti-rich zone to promote the nucleation of α-Al. The experiments certified that TiC was formed by the reaction between solid C and excess Ti atoms. The main reactions in the Al-5Ti-0.62C system were that solid Al is transferred into liquid Al, and then liquid Al reacted with solid Ti to form the Al(3)Ti. At last, the release of a lot of heat promotes the formation of TiC which formed by the Ti atoms and solid C. |
format | Online Article Text |
id | pubmed-7013678 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70136782020-03-09 Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC Ding, Wanwu Chen, Taili Zhao, Xiaoyan Cheng, Yan Liu, Xiaoxiong Gou, Lumin Materials (Basel) Article Al-Ti-C master alloys have been widely investigated by various researchers. However, their refining effectiveness is still severely compromised by the preparation process. In this work, the aluminum melt in-situ reaction was carried out to synthesize the Al-5Ti-0.62C, and its refining performance was estimated. The thermodynamics calculation and differential scanning calorimeter experiment were used to investigate the synthesis mechanism of TiC. Quenching experiment was conducted to explore phase and microstructure transformation of the Al-5Ti-0.62C system. The results show that the main phases of Al-5Ti-0.62C master alloys are α-Al, Al(3)Ti, and TiC and it has a positive effect on commercial pure aluminum refining. Commercial pure aluminum is completely refined into the fine equiaxed structure by adding 0.3% Al-5Ti-0.62C master alloy. TiC particles mainly distribute in the grain interior and grain boundaries. The excess Ti came from the dissolution of Al(3)Ti spreading around TiC and finally forming the Ti-rich zone to promote the nucleation of α-Al. The experiments certified that TiC was formed by the reaction between solid C and excess Ti atoms. The main reactions in the Al-5Ti-0.62C system were that solid Al is transferred into liquid Al, and then liquid Al reacted with solid Ti to form the Al(3)Ti. At last, the release of a lot of heat promotes the formation of TiC which formed by the Ti atoms and solid C. MDPI 2020-01-09 /pmc/articles/PMC7013678/ /pubmed/31936643 http://dx.doi.org/10.3390/ma13020310 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ding, Wanwu Chen, Taili Zhao, Xiaoyan Cheng, Yan Liu, Xiaoxiong Gou, Lumin Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC |
title | Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC |
title_full | Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC |
title_fullStr | Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC |
title_full_unstemmed | Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC |
title_short | Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC |
title_sort | investigation of microstructure of al-5ti-0.62c system and synthesis mechanism of tic |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013678/ https://www.ncbi.nlm.nih.gov/pubmed/31936643 http://dx.doi.org/10.3390/ma13020310 |
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