Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites
Zirconium diboride is an ultra high temperature ceramic material that leads this emerging class of materials because of its distinct combination of properties, including high melting temperature (> 3000 °C) and the lowest theoretical density(6.09 g·cm–3) among the borides. This combination of pro...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Instituto de Aeronáutica e Espaço (IAE)
2019-06-01
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| Series: | Journal of Aerospace Technology and Management |
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| Online Access: | http://www.scielo.br/pdf/jatm/v11/2175-9146-jatm-11-e2819.pdf |
| _version_ | 1828187520975765504 |
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| author | Rosa Maria da Rocha Frank Ferrer Sene Mariah de Oliveira Juliani Caroline Oliveira Davi |
| author_facet | Rosa Maria da Rocha Frank Ferrer Sene Mariah de Oliveira Juliani Caroline Oliveira Davi |
| author_sort | Rosa Maria da Rocha |
| collection | DOAJ |
| description | Zirconium diboride is an ultra high temperature ceramic material that leads this emerging class of materials because of its distinct combination of properties, including high melting temperature (> 3000 °C) and the lowest theoretical density(6.09 g·cm–3) among the borides. This combination of properties makes ZrB2 candidate for airframe leading edges on sharpbodied reentry vehicles. In this work, the effect of particle size of ZrB2 on the pressureless sintering of ZrB2-SiC composites was studied, using ZrB2 powder with average particle size of 2.6 and 14.2µm. Four different vol% concentration of ß-SiC (0, 10, 20 and 30 vol%) were added to as-received and planetary milled ZrB2 powder. Samples were pressureless sintered at 2050 °C/1h in argon atmosphere. The reduction of initial ZrB2 particle size led to composites with better results of densification, mechanical properties and oxidation resistance regardless ß-SiC addition, showing relative densities around 92.5 %Theoretical Density (Td) and flexural strength and microhardness around 260 MPa and 17.5 GPa, respectively. Composites processed with as-received ZrB2 powder showed increasing in densification and flexural strength with the SiC content increasing. Relative density varied from 74.7 to 90.8 %TD and flexural strength from 102 to 241 MPa, for 0 and 30 vol% of SiC, respectively. |
| first_indexed | 2024-04-12T07:36:16Z |
| format | Article |
| id | doaj.art-eba208b936be4d9eaa6c35cb84a092f6 |
| institution | Directory Open Access Journal |
| issn | 1984-9648 2175-9146 |
| language | English |
| last_indexed | 2024-04-12T07:36:16Z |
| publishDate | 2019-06-01 |
| publisher | Instituto de Aeronáutica e Espaço (IAE) |
| record_format | Article |
| series | Journal of Aerospace Technology and Management |
| spelling | doaj.art-eba208b936be4d9eaa6c35cb84a092f62022-12-22T03:41:56ZengInstituto de Aeronáutica e Espaço (IAE)Journal of Aerospace Technology and Management1984-96482175-91462019-06-011112819281910.5028/jatm.v11.1049Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic CompositesRosa Maria da Rocha0Frank Ferrer Sene1Mariah de Oliveira Juliani2Caroline Oliveira Davi3Departamento de Ciência e Tecnologia Aeroespacial Departamento de Ciência e Tecnologia Aeroespacial Universidade de São PauloUniversidade de São PauloZirconium diboride is an ultra high temperature ceramic material that leads this emerging class of materials because of its distinct combination of properties, including high melting temperature (> 3000 °C) and the lowest theoretical density(6.09 g·cm–3) among the borides. This combination of properties makes ZrB2 candidate for airframe leading edges on sharpbodied reentry vehicles. In this work, the effect of particle size of ZrB2 on the pressureless sintering of ZrB2-SiC composites was studied, using ZrB2 powder with average particle size of 2.6 and 14.2µm. Four different vol% concentration of ß-SiC (0, 10, 20 and 30 vol%) were added to as-received and planetary milled ZrB2 powder. Samples were pressureless sintered at 2050 °C/1h in argon atmosphere. The reduction of initial ZrB2 particle size led to composites with better results of densification, mechanical properties and oxidation resistance regardless ß-SiC addition, showing relative densities around 92.5 %Theoretical Density (Td) and flexural strength and microhardness around 260 MPa and 17.5 GPa, respectively. Composites processed with as-received ZrB2 powder showed increasing in densification and flexural strength with the SiC content increasing. Relative density varied from 74.7 to 90.8 %TD and flexural strength from 102 to 241 MPa, for 0 and 30 vol% of SiC, respectively.http://www.scielo.br/pdf/jatm/v11/2175-9146-jatm-11-e2819.pdfUltra high temperature ceramicsZrB2SiCSinteringThermal protection system. |
| spellingShingle | Rosa Maria da Rocha Frank Ferrer Sene Mariah de Oliveira Juliani Caroline Oliveira Davi Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites Journal of Aerospace Technology and Management Ultra high temperature ceramics ZrB2 SiC Sintering Thermal protection system. |
| title | Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites |
| title_full | Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites |
| title_fullStr | Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites |
| title_full_unstemmed | Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites |
| title_short | Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites |
| title_sort | effect of zrb2 particle size on pressureless sintering of zrb2 ss sic composites |
| topic | Ultra high temperature ceramics ZrB2 SiC Sintering Thermal protection system. |
| url | http://www.scielo.br/pdf/jatm/v11/2175-9146-jatm-11-e2819.pdf |
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