High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressing
Two compositions of ZrB2-based ceramic composites containing Si3N4, Al2O3 and Y2O3 have been hot-pressed at different temperatures between 1673 and 1773 K for 60 min in vacuum. The densification behavior of the composites was examined during the sintering process. The microstructures of the composit...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2012-01-01
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| Series: | Science and Technology of Advanced Materials |
| Online Access: | http://dx.doi.org/10.1088/1468-6996/13/4/045007 |
| _version_ | 1819177375155355648 |
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| author | Shuqi Guo and Yutaka Kagawa |
| author_facet | Shuqi Guo and Yutaka Kagawa |
| author_sort | Shuqi Guo and Yutaka Kagawa |
| collection | DOAJ |
| description | Two compositions of ZrB2-based ceramic composites containing Si3N4, Al2O3 and Y2O3 have been hot-pressed at different temperatures between 1673 and 1773 K for 60 min in vacuum. The densification behavior of the composites was examined during the sintering process. The microstructures of the composites were characterized by scanning electron microscopy, and the crystalline phases were identified by x-ray diffraction. The effects of Al2O3 and Y2O3 additives on the densification behavior and flexural strength were assessed. A relative density of ~95% was obtained after sintering at 1723 K or higher temperatures. The microstructures of the composites consisted of (Zr,Y)B2, α-Si3N4 and Y3(Al,Si)5O12 phases. The room-temperature flexural strength increased with the amount of additives and approached 1 GPa. |
| first_indexed | 2024-12-22T21:25:39Z |
| format | Article |
| id | doaj.art-2a4824e029444c9fa5772288db3cdba7 |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-12-22T21:25:39Z |
| publishDate | 2012-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-2a4824e029444c9fa5772288db3cdba72022-12-21T18:12:03ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142012-01-01134045007High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressingShuqi Guo and Yutaka KagawaTwo compositions of ZrB2-based ceramic composites containing Si3N4, Al2O3 and Y2O3 have been hot-pressed at different temperatures between 1673 and 1773 K for 60 min in vacuum. The densification behavior of the composites was examined during the sintering process. The microstructures of the composites were characterized by scanning electron microscopy, and the crystalline phases were identified by x-ray diffraction. The effects of Al2O3 and Y2O3 additives on the densification behavior and flexural strength were assessed. A relative density of ~95% was obtained after sintering at 1723 K or higher temperatures. The microstructures of the composites consisted of (Zr,Y)B2, α-Si3N4 and Y3(Al,Si)5O12 phases. The room-temperature flexural strength increased with the amount of additives and approached 1 GPa.http://dx.doi.org/10.1088/1468-6996/13/4/045007 |
| spellingShingle | Shuqi Guo and Yutaka Kagawa High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressing Science and Technology of Advanced Materials |
| title | High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressing |
| title_full | High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressing |
| title_fullStr | High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressing |
| title_full_unstemmed | High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressing |
| title_short | High-strength zirconium diboride-based ceramic composites consolidated by low-temperature hot pressing |
| title_sort | high strength zirconium diboride based ceramic composites consolidated by low temperature hot pressing |
| url | http://dx.doi.org/10.1088/1468-6996/13/4/045007 |
| work_keys_str_mv | AT shuqiguoandyutakakagawa highstrengthzirconiumdiboridebasedceramiccompositesconsolidatedbylowtemperaturehotpressing |