Microstructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction
Co–Al porous intermetallics were fabricated by an efficient and energy-saving method of thermal explosion (TE) reactions. The effects of Co/Al molar ratios on the temperature profiles, phase compositions, expansion behaviors, density, pore characteristics, and oxidation resistance were investigated....
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2021
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oai:doaj.org-article:d6d97110b7c64e2e82e28348ff58ea942021-12-05T14:10:50ZMicrostructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction2191-032410.1515/htmp-2020-0076https://doaj.org/article/d6d97110b7c64e2e82e28348ff58ea942021-05-01T00:00:00Zhttps://doi.org/10.1515/htmp-2020-0076https://doaj.org/toc/2191-0324Co–Al porous intermetallics were fabricated by an efficient and energy-saving method of thermal explosion (TE) reactions. The effects of Co/Al molar ratios on the temperature profiles, phase compositions, expansion behaviors, density, pore characteristics, and oxidation resistance were investigated. When the target furnace temperature was set at 700°C, there was an obvious exothermic peak in the temperature profiles. The ignition temperatures were in the range of 600–645°C, and the combustion temperatures were in the range of 984–1,421°C. Co–Al porous intermetallics had the open porosity of 27–43%, and the pores were from nonfully dense green compacts and explosion behaviors of TE. The specimen with Co:Al = 2:9 possessed a higher open porosity of 42.8%, the lowest density of 1.86 g cm−3, and the largest volume expansion of 76.7%. The porous specimens with Co:Al = 1:1 possessed the highest open porosity of 43.2%, the lowest volume expansion of 12.3%, and the highest density of 3.42 g cm−3. All Co–Al porous intermetallics showed excellent oxidation resistance at 650°C in air, especially the specimen with Co:Al = 1:1 had the highest oxidation resistance.Kang XueqinQiao LeiZhang HaifeiWang JianzhongFeng PeizhongDe Gruyterarticleporous materialsintermetallicspowder metallurgythermal explosionTechnologyTChemical technologyTP1-1185Chemicals: Manufacture, use, etc.TP200-248ENHigh Temperature Materials and Processes, Vol 40, Iss 1, Pp 141-150 (2021) |
| institution |
DOAJ |
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DOAJ |
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EN |
| topic |
porous materials intermetallics powder metallurgy thermal explosion Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 |
| spellingShingle |
porous materials intermetallics powder metallurgy thermal explosion Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 Kang Xueqin Qiao Lei Zhang Haifei Wang Jianzhong Feng Peizhong Microstructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction |
| description |
Co–Al porous intermetallics were fabricated by an efficient and energy-saving method of thermal explosion (TE) reactions. The effects of Co/Al molar ratios on the temperature profiles, phase compositions, expansion behaviors, density, pore characteristics, and oxidation resistance were investigated. When the target furnace temperature was set at 700°C, there was an obvious exothermic peak in the temperature profiles. The ignition temperatures were in the range of 600–645°C, and the combustion temperatures were in the range of 984–1,421°C. Co–Al porous intermetallics had the open porosity of 27–43%, and the pores were from nonfully dense green compacts and explosion behaviors of TE. The specimen with Co:Al = 2:9 possessed a higher open porosity of 42.8%, the lowest density of 1.86 g cm−3, and the largest volume expansion of 76.7%. The porous specimens with Co:Al = 1:1 possessed the highest open porosity of 43.2%, the lowest volume expansion of 12.3%, and the highest density of 3.42 g cm−3. All Co–Al porous intermetallics showed excellent oxidation resistance at 650°C in air, especially the specimen with Co:Al = 1:1 had the highest oxidation resistance. |
| format |
article |
| author |
Kang Xueqin Qiao Lei Zhang Haifei Wang Jianzhong Feng Peizhong |
| author_facet |
Kang Xueqin Qiao Lei Zhang Haifei Wang Jianzhong Feng Peizhong |
| author_sort |
Kang Xueqin |
| title |
Microstructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction |
| title_short |
Microstructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction |
| title_full |
Microstructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction |
| title_fullStr |
Microstructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction |
| title_full_unstemmed |
Microstructure and properties of Co–Al porous intermetallics fabricated by thermal explosion reaction |
| title_sort |
microstructure and properties of co–al porous intermetallics fabricated by thermal explosion reaction |
| publisher |
De Gruyter |
| publishDate |
2021 |
| url |
https://doaj.org/article/d6d97110b7c64e2e82e28348ff58ea94 |
| work_keys_str_mv |
AT kangxueqin microstructureandpropertiesofcoalporousintermetallicsfabricatedbythermalexplosionreaction AT qiaolei microstructureandpropertiesofcoalporousintermetallicsfabricatedbythermalexplosionreaction AT zhanghaifei microstructureandpropertiesofcoalporousintermetallicsfabricatedbythermalexplosionreaction AT wangjianzhong microstructureandpropertiesofcoalporousintermetallicsfabricatedbythermalexplosionreaction AT fengpeizhong microstructureandpropertiesofcoalporousintermetallicsfabricatedbythermalexplosionreaction |
| _version_ |
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