Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature
Porous TiAl3 intermetallics were synthesized from Ti-75 at.% Al elemental powder mixtures using an energy-saving and rapid reactive method of thermal explosion (TE). The results demonstrated that the actual temperature of the compact climbed rapidly from 673 °C to 1036 °C within 24 s, indicating tha...
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Series: | Progress in Natural Science: Materials International |
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doaj-bbd5f5d0e4514aaca92c98013801b4af2020-11-25T02:47:15ZengElsevierProgress in Natural Science: Materials International1002-00712019-08-01294447452Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperatureXinyang Jiao0Xiaoping Cai1Gao Niu2Xuanru Ren3Xueqin Kang4Peizhong Feng5School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, China; School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, ChinaSchool of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaSchool of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, ChinaSchool of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, ChinaSchool of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, China; Corresponding author.Porous TiAl3 intermetallics were synthesized from Ti-75 at.% Al elemental powder mixtures using an energy-saving and rapid reactive method of thermal explosion (TE). The results demonstrated that the actual temperature of the compact climbed rapidly from 673 °C to 1036 °C within 24 s, indicating that an obvious TE reaction occurred during sintering process. The video graphs suggested that the TE in Ti–Al system behaved instant occurrence and overall heating whether from axial or radial direction. The silver wires and NaCl particles that pressed on the surface of the sample disappeared due to the heavy heat released during TE reaction. Only pure TiAl3 phases were synthesized in TE products and the open porosity of 55.4% was easy to obtain. After high-temperature treatment at 1000 °C, large amounts of sintering-neck formed and then improved the compressive strength of porous TiAl3 materials. Moreover, the mass gain curve of porous TiAl3 intermetallics oxidized at 650 °C for 120 h exhibited the parabolic oxidation rate law. XPS analysis confirmed that the strong O 1s peak was 531.4 eV which was the typical binding energy of Al2O3. Therefore, the excellent oxidation resistance of porous TiAl3 foams would be considered as good candidate materials for prolonging the service life at high temperatures. Keywords: Porous materials, Rapid synthesis, TiAl3 intermetallics, Thermal explosion, Oxidation resistancehttp://www.sciencedirect.com/science/article/pii/S1002007118308451 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xinyang Jiao Xiaoping Cai Gao Niu Xuanru Ren Xueqin Kang Peizhong Feng |
spellingShingle |
Xinyang Jiao Xiaoping Cai Gao Niu Xuanru Ren Xueqin Kang Peizhong Feng Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature Progress in Natural Science: Materials International |
author_facet |
Xinyang Jiao Xiaoping Cai Gao Niu Xuanru Ren Xueqin Kang Peizhong Feng |
author_sort |
Xinyang Jiao |
title |
Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature |
title_short |
Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature |
title_full |
Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature |
title_fullStr |
Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature |
title_full_unstemmed |
Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature |
title_sort |
rapid reactive synthesis of tial3 intermetallics by thermal explosion and its oxidation resistance at high temperature |
publisher |
Elsevier |
series |
Progress in Natural Science: Materials International |
issn |
1002-0071 |
publishDate |
2019-08-01 |
description |
Porous TiAl3 intermetallics were synthesized from Ti-75 at.% Al elemental powder mixtures using an energy-saving and rapid reactive method of thermal explosion (TE). The results demonstrated that the actual temperature of the compact climbed rapidly from 673 °C to 1036 °C within 24 s, indicating that an obvious TE reaction occurred during sintering process. The video graphs suggested that the TE in Ti–Al system behaved instant occurrence and overall heating whether from axial or radial direction. The silver wires and NaCl particles that pressed on the surface of the sample disappeared due to the heavy heat released during TE reaction. Only pure TiAl3 phases were synthesized in TE products and the open porosity of 55.4% was easy to obtain. After high-temperature treatment at 1000 °C, large amounts of sintering-neck formed and then improved the compressive strength of porous TiAl3 materials. Moreover, the mass gain curve of porous TiAl3 intermetallics oxidized at 650 °C for 120 h exhibited the parabolic oxidation rate law. XPS analysis confirmed that the strong O 1s peak was 531.4 eV which was the typical binding energy of Al2O3. Therefore, the excellent oxidation resistance of porous TiAl3 foams would be considered as good candidate materials for prolonging the service life at high temperatures. Keywords: Porous materials, Rapid synthesis, TiAl3 intermetallics, Thermal explosion, Oxidation resistance |
url |
http://www.sciencedirect.com/science/article/pii/S1002007118308451 |
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