Pressureless solid-state sintering of SiC ceramics with BN and C additives
This study proposes BN as a new sintering aid for pressureless solid-state sintering of SiC ceramics. The full densification of SiC ceramics for 0.5–2.7 wt% BN addition showed the composition tolerance of the newly developed ceramics. The electrical resistivity decreased by an order of magnitude (10...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-07-01
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| Series: | Journal of Asian Ceramic Societies |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21870764.2021.1946268 |
| _version_ | 1818826353614520320 |
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| author | Rohit Malik Young-Wook Kim |
| author_facet | Rohit Malik Young-Wook Kim |
| author_sort | Rohit Malik |
| collection | DOAJ |
| description | This study proposes BN as a new sintering aid for pressureless solid-state sintering of SiC ceramics. The full densification of SiC ceramics for 0.5–2.7 wt% BN addition showed the composition tolerance of the newly developed ceramics. The electrical resistivity decreased by an order of magnitude (107→106 Ω·cm) as BN content increased from ~0.5 to ~0.9 wt% because of the increased BN-derived B doping in the SiC lattice. A further increase in BN content had no significant effect on the electrical resistivity, which is attributed to the limited solubility of B in the SiC lattice. The thermal conductivity decreased with increasing BN content owing to increased phonon scattering at B-doped sites and the thermally insulating BN phase located at the grain boundaries. The fracture toughness increased with increasing BN content owing to interfacial debonding at the weak SiC-BN interfaces. However, intrinsically weak BN grains with low hardness were responsible for reduced flexural strength and hardness with increasing BN content. |
| first_indexed | 2024-12-19T00:26:19Z |
| format | Article |
| id | doaj.art-c11f4a8b35314082ad14d4a2aff8e603 |
| institution | Directory Open Access Journal |
| issn | 2187-0764 |
| language | English |
| last_indexed | 2024-12-19T00:26:19Z |
| publishDate | 2021-07-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Ceramic Societies |
| spelling | doaj.art-c11f4a8b35314082ad14d4a2aff8e6032022-12-21T20:45:14ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642021-07-01931165117210.1080/21870764.2021.19462681946268Pressureless solid-state sintering of SiC ceramics with BN and C additivesRohit Malik0Young-Wook Kim1The University of SeoulThe University of SeoulThis study proposes BN as a new sintering aid for pressureless solid-state sintering of SiC ceramics. The full densification of SiC ceramics for 0.5–2.7 wt% BN addition showed the composition tolerance of the newly developed ceramics. The electrical resistivity decreased by an order of magnitude (107→106 Ω·cm) as BN content increased from ~0.5 to ~0.9 wt% because of the increased BN-derived B doping in the SiC lattice. A further increase in BN content had no significant effect on the electrical resistivity, which is attributed to the limited solubility of B in the SiC lattice. The thermal conductivity decreased with increasing BN content owing to increased phonon scattering at B-doped sites and the thermally insulating BN phase located at the grain boundaries. The fracture toughness increased with increasing BN content owing to interfacial debonding at the weak SiC-BN interfaces. However, intrinsically weak BN grains with low hardness were responsible for reduced flexural strength and hardness with increasing BN content.http://dx.doi.org/10.1080/21870764.2021.1946268sicpressureless solid-state sinteringelectrical conductivitythermal conductivitymechanical properties |
| spellingShingle | Rohit Malik Young-Wook Kim Pressureless solid-state sintering of SiC ceramics with BN and C additives Journal of Asian Ceramic Societies sic pressureless solid-state sintering electrical conductivity thermal conductivity mechanical properties |
| title | Pressureless solid-state sintering of SiC ceramics with BN and C additives |
| title_full | Pressureless solid-state sintering of SiC ceramics with BN and C additives |
| title_fullStr | Pressureless solid-state sintering of SiC ceramics with BN and C additives |
| title_full_unstemmed | Pressureless solid-state sintering of SiC ceramics with BN and C additives |
| title_short | Pressureless solid-state sintering of SiC ceramics with BN and C additives |
| title_sort | pressureless solid state sintering of sic ceramics with bn and c additives |
| topic | sic pressureless solid-state sintering electrical conductivity thermal conductivity mechanical properties |
| url | http://dx.doi.org/10.1080/21870764.2021.1946268 |
| work_keys_str_mv | AT rohitmalik pressurelesssolidstatesinteringofsicceramicswithbnandcadditives AT youngwookkim pressurelesssolidstatesinteringofsicceramicswithbnandcadditives |