Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite
Microstructure; Molybdenum compounds; Oxidation resistance; Particle size; Silicon carbide; Vickers hardness; X ray diffraction analysis; Zirconium compounds; Nano-sized particles; Oxidized surfaces; Oxygen penetration; Pressureless-sintered; Reinforcing phase; SiC-based ceramics; Silicon carbides (...
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2023
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my.uniten.dspace-266022023-05-29T17:12:36Z Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite Mashhadi M. Salimi I.G. Golieskardi M. 24776823200 57221439232 55866907000 Microstructure; Molybdenum compounds; Oxidation resistance; Particle size; Silicon carbide; Vickers hardness; X ray diffraction analysis; Zirconium compounds; Nano-sized particles; Oxidized surfaces; Oxygen penetration; Pressureless-sintered; Reinforcing phase; SiC-based ceramics; Silicon carbides (SiC); Solid solution formation; Hafnium compounds In order to improve oxidation resistance and mechanical properties of ZrB2-based composites, 10% silicon carbide (SiC) nano-sized particles were used as a reinforcing phase and 4% MoSi2 as a synthesizer aid. In this work, the effects of HfB2 addition (0, 5, 10, 15, 20, and 25%) on Vickers hardness, bulk density, oxidation resistance, and microstructure of the ZrB2-SiC-based ceramics were investigated. The results revealed that the samples consisting of 10% HfB2 have the highest relative density (98.4%). The lowest apparent porosity (i.e., 15%) and the highest hardness (i.e., 15.24 GPa) of the samples were achieved by the addition of 20% HfB2. The X-ray diffraction (XRD) analysis indicated that prolonging the oxidation period resulted in the production of more oxide compounds. The sample containing 25% HfB2 in addition to the lowest relative density due to the oxidized surface erosion and the formation of a poor layer of porous SiC exhibited the maximum oxygen penetration into the sample, the highest gain in mass, and the least oxidation resistance even compared to the ZrB2-SiC composite without the HfB2 addition. It was concluded that by increasing the temperature and time, solid solution formation increases. � 2020 by Begell House, Inc. Final 2023-05-29T09:12:36Z 2023-05-29T09:12:36Z 2021 Article 10.1615/COMPMECHCOMPUTAPPLINTJ.2020030129 2-s2.0-85099140482 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099140482&doi=10.1615%2fCOMPMECHCOMPUTAPPLINTJ.2020030129&partnerID=40&md5=6e1362bb79ae3b8ef798b4cc87539f27 https://irepository.uniten.edu.my/handle/123456789/26602 11 4 287 308 Begell House Inc. Scopus |
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Microstructure; Molybdenum compounds; Oxidation resistance; Particle size; Silicon carbide; Vickers hardness; X ray diffraction analysis; Zirconium compounds; Nano-sized particles; Oxidized surfaces; Oxygen penetration; Pressureless-sintered; Reinforcing phase; SiC-based ceramics; Silicon carbides (SiC); Solid solution formation; Hafnium compounds |
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24776823200 |
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24776823200 Mashhadi M. Salimi I.G. Golieskardi M. |
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Article |
| author |
Mashhadi M. Salimi I.G. Golieskardi M. |
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Mashhadi M. Salimi I.G. Golieskardi M. Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite |
| author_sort |
Mashhadi M. |
| title |
Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite |
| title_short |
Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite |
| title_full |
Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite |
| title_fullStr |
Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite |
| title_full_unstemmed |
Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite |
| title_sort |
effects of hfb2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered zrb2-sic composite |
| publisher |
Begell House Inc. |
| publishDate |
2023 |
| _version_ |
1806426467292151808 |
| score |
13.18916 |