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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Main Authors:	Xinyang Jiao, Xiaoping Cai, Gao Niu, Xuanru Ren, Xueqin Kang, Peizhong Feng
Format:	Article
Language:	English
Published:	Elsevier 2019-08-01
Series:	Progress in Natural Science: Materials International
Online Access:	http://www.sciencedirect.com/science/article/pii/S1002007118308451

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spelling	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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Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature

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