EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITES
Reactive hot pressing (RHP) offers many advantages over the conventional hot pressing process. In this work, TiB₂-20wt.% SiC ultra-high temperature ceramic composites were fabricated via RHP. The effects of sintering time (1600-1700 °C) and sintering temperature (30-60 min), as well as the relations...
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| Format: | Article |
| Language: | English |
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University of Chemistry and Technology, Prague
2016-07-01
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| Series: | Ceramics-Silikáty |
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| Online Access: |
http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=474
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| _version_ | 1811323924989870080 |
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| author | Guolong Zhao Chuanzhen Huang He Ning Liu Hanlian Zou Bin |
| author_facet | Guolong Zhao Chuanzhen Huang He Ning Liu Hanlian Zou Bin |
| author_sort | Guolong Zhao |
| collection | DOAJ |
| description | Reactive hot pressing (RHP) offers many advantages over the conventional hot pressing process. In this work, TiB₂-20wt.% SiC ultra-high temperature ceramic composites were fabricated via RHP. The effects of sintering time (1600-1700 °C) and sintering temperature (30-60 min), as well as the relationship between microstructure and mechanical properties, were investigated. For the investigated range of sintering conditions, the optimum comprehensive mechanical properties, i.e., flexural strength of 725 MPa, fracture toughness of 6.5 MPa.m1/2 and hardness of 21.6 GPa, was achieved at 1700 °C for 45 min. The good mechanical properties were attributed to small grain size and homogeneous microstructure. The sintering time and temperature had significant influences on the mechanical properties and microstructure of the composites. The flexural strength and hardness increased when the sintering time prolonged from 30 min to 45 min, subsequently decreased with further increasing of time. The fracture toughness had the opposite trend. With increasing of the sintering temperature, both the flexural strength and hardness increased. The high porosity resulted from the low temperature was responsible for the poor mechanical properties. Moderate sintering time and a higher sintering temperature would lead to higher mechanical properties. |
| first_indexed | 2024-04-13T14:05:13Z |
| format | Article |
| id | doaj.art-28e00170ecba4f8698321d9abcffb5ac |
| institution | Directory Open Access Journal |
| issn | 0862-5468 1804-5847 |
| language | English |
| last_indexed | 2024-04-13T14:05:13Z |
| publishDate | 2016-07-01 |
| publisher | University of Chemistry and Technology, Prague |
| record_format | Article |
| series | Ceramics-Silikáty |
| spelling | doaj.art-28e00170ecba4f8698321d9abcffb5ac2022-12-22T02:43:56ZengUniversity of Chemistry and Technology, PragueCeramics-Silikáty0862-54681804-58472016-07-0160322623310.13168/cs.2016.003410.13168/cs.2016.0034.20160801065256EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITESGuolong Zhao0Chuanzhen HuangHe Ning1Liu HanlianZou Bin College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China Reactive hot pressing (RHP) offers many advantages over the conventional hot pressing process. In this work, TiB₂-20wt.% SiC ultra-high temperature ceramic composites were fabricated via RHP. The effects of sintering time (1600-1700 °C) and sintering temperature (30-60 min), as well as the relationship between microstructure and mechanical properties, were investigated. For the investigated range of sintering conditions, the optimum comprehensive mechanical properties, i.e., flexural strength of 725 MPa, fracture toughness of 6.5 MPa.m1/2 and hardness of 21.6 GPa, was achieved at 1700 °C for 45 min. The good mechanical properties were attributed to small grain size and homogeneous microstructure. The sintering time and temperature had significant influences on the mechanical properties and microstructure of the composites. The flexural strength and hardness increased when the sintering time prolonged from 30 min to 45 min, subsequently decreased with further increasing of time. The fracture toughness had the opposite trend. With increasing of the sintering temperature, both the flexural strength and hardness increased. The high porosity resulted from the low temperature was responsible for the poor mechanical properties. Moderate sintering time and a higher sintering temperature would lead to higher mechanical properties. http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=474 TiB₂-20wt%SiC Reactive hot pressing Sintering time Sintering temperature |
| spellingShingle | Guolong Zhao Chuanzhen Huang He Ning Liu Hanlian Zou Bin EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITES Ceramics-Silikáty TiB₂-20wt%SiC Reactive hot pressing Sintering time Sintering temperature |
| title | EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITES |
| title_full | EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITES |
| title_fullStr | EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITES |
| title_full_unstemmed | EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITES |
| title_short | EFFECTS OF SINTERING CONDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF REACTIVE HOT PRESSED TiB₂-SiC CERAMIC COMPOSITES |
| title_sort | effects of sintering conditions on microstructure and mechanical properties of reactive hot pressed tib₂ sic ceramic composites |
| topic | TiB₂-20wt%SiC Reactive hot pressing Sintering time Sintering temperature |
| url |
http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=474
|
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