On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 composites
Hot-spot creation during flash sintering is considered a key limitation for its industrialization. Establishing a method to predict this phenomenon can address this limitation. Here, a three-phase Gd2O3-m-ZrO2-8YSZ composite was designed to introduce a percolative current, and the induced hot-spot i...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Open Ceramics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539522000840 |
| _version_ | 1828181505211367424 |
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| author | Yue Cao Guo-Cheng Xu Federico Smeacetto Ping Shen |
| author_facet | Yue Cao Guo-Cheng Xu Federico Smeacetto Ping Shen |
| author_sort | Yue Cao |
| collection | DOAJ |
| description | Hot-spot creation during flash sintering is considered a key limitation for its industrialization. Establishing a method to predict this phenomenon can address this limitation. Here, a three-phase Gd2O3-m-ZrO2-8YSZ composite was designed to introduce a percolative current, and the induced hot-spot issue was systematically investigated. We show that the percolative current can be induced when the 8YSZ fraction reaches a certain value, but it will be suppressed as Gd2Zr2O7 generated at flash onset. On these bases, the effect of percolative current on sintering behavior was investigated by performing isothermal flash experiments. We demonstrated that hot spots tend to form in the presence of percolative current, and their size increases with increasing voltage. This was further distinguished with respect to onset power density, from which an abnormal rise was observed in the hot-spot samples. This finding was explained in terms of thermal runaway and could be considered an indicator of local heating. |
| first_indexed | 2024-04-12T06:02:44Z |
| format | Article |
| id | doaj.art-57c7937b16e04e869a28443c8991560c |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-04-12T06:02:44Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-57c7937b16e04e869a28443c8991560c2022-12-22T03:44:59ZengElsevierOpen Ceramics2666-53952022-12-0112100301On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 compositesYue Cao0Guo-Cheng Xu1Federico Smeacetto2Ping Shen3Key Laboratory of Automobile Materials (Ministry of Education), Department of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130025, PR China; Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, ItalyKey Laboratory of Automobile Materials (Ministry of Education), Department of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130025, PR ChinaDepartment of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, ItalyKey Laboratory of Automobile Materials (Ministry of Education), Department of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130025, PR China; Corresponding author.Hot-spot creation during flash sintering is considered a key limitation for its industrialization. Establishing a method to predict this phenomenon can address this limitation. Here, a three-phase Gd2O3-m-ZrO2-8YSZ composite was designed to introduce a percolative current, and the induced hot-spot issue was systematically investigated. We show that the percolative current can be induced when the 8YSZ fraction reaches a certain value, but it will be suppressed as Gd2Zr2O7 generated at flash onset. On these bases, the effect of percolative current on sintering behavior was investigated by performing isothermal flash experiments. We demonstrated that hot spots tend to form in the presence of percolative current, and their size increases with increasing voltage. This was further distinguished with respect to onset power density, from which an abnormal rise was observed in the hot-spot samples. This finding was explained in terms of thermal runaway and could be considered an indicator of local heating.http://www.sciencedirect.com/science/article/pii/S2666539522000840Flash sinteringHot spotPercolation |
| spellingShingle | Yue Cao Guo-Cheng Xu Federico Smeacetto Ping Shen On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 composites Open Ceramics Flash sintering Hot spot Percolation |
| title | On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 composites |
| title_full | On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 composites |
| title_fullStr | On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 composites |
| title_full_unstemmed | On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 composites |
| title_short | On the current percolation-induced hot-spot issue during flash sintering: The case of 8 mol% yttria-stabilized zirconia and Gd2Zr2O7 composites |
| title_sort | on the current percolation induced hot spot issue during flash sintering the case of 8 mol yttria stabilized zirconia and gd2zr2o7 composites |
| topic | Flash sintering Hot spot Percolation |
| url | http://www.sciencedirect.com/science/article/pii/S2666539522000840 |
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