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Porous TiAl3 intermetallics with symmetrical graded pore-structure fabricated by leaching space holder and thermal explosion process
Jiao, XY; Ren, XR; Wang, XH; Wang, SG; Feng, PZ; Wang, JZ; Feng, PZ (reprint author), China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China.
2018-04-01
Source PublicationINTERMETALLICS
ISSN0966-9795
Volume95Pages:144-149
AbstractHigh porosity of porous TiAl3 intermetallics were prepared from Ti-75Al at.% elemental powders by NaCl as temporary space holder, combining with multilayer stacking technology and thermal explosion reaction. Results showed that space holder particles in green compact were completely removed before sintering and only single TiAl3 phases were synthesized in sintered product. The porosity (>70%) can be easily obtained when adding 0, 30 or 50 vol.% NaCl in designed layers. SEM image indicated that the distribution of small pores ( <80 mu m) was uniform and embedded in pore walls of the skeleton without NaCl space holder. Large pores (300-500 mu m) began to appear when added the NaCl particles and the number of large pores improved with the increase of space holder content. The sintered discs with three or five sintered layers exhibited a symmetrical graded pore size distribution: large pores replicating from space holder and small pores generated during the sintering process. The graded pore-structure can be designed by adjusting the compact structure in each layer, allowing for a widespread applications in specific filtration units and liquid-gas separation.; High porosity of porous TiAl3 intermetallics were prepared from Ti-75Al at.% elemental powders by NaCl as temporary space holder, combining with multilayer stacking technology and thermal explosion reaction. Results showed that space holder particles in green compact were completely removed before sintering and only single TiAl3 phases were synthesized in sintered product. The porosity (>70%) can be easily obtained when adding 0, 30 or 50 vol.% NaCl in designed layers. SEM image indicated that the distribution of small pores ( <80 mu m) was uniform and embedded in pore walls of the skeleton without NaCl space holder. Large pores (300-500 mu m) began to appear when added the NaCl particles and the number of large pores improved with the increase of space holder content. The sintered discs with three or five sintered layers exhibited a symmetrical graded pore size distribution: large pores replicating from space holder and small pores generated during the sintering process. The graded pore-structure can be designed by adjusting the compact structure in each layer, allowing for a widespread applications in specific filtration units and liquid-gas separation.
description.department[jiao, xinyang ; ren, xuanru ; wang, xiaohong ; feng, peizhong] china univ min & technol, sch mat sci & engn, xuzhou 221116, peoples r china ; [jiao, xinyang] china univ min & technol, sch chem engn & technol, xuzhou 221116, peoples r china ; [wang, shaogang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, liaoning, peoples r china ; [wang, jianzhong] northwest inst nonferrous met res, state key lab porous met mat, xian 710016, shaanxi, peoples r china
KeywordTi-al Combustion Synthesis Heat-treatment Alloys Temperature Behavior Mode Foam
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51574241]; bilateral project of NSFC-STINT [51611130064]; Program for Innovation Research Team of China University of Mining and Technology [2015QN004]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79394
Collection中国科学院金属研究所
Corresponding AuthorFeng, PZ (reprint author), China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China.
Recommended Citation
GB/T 7714
Jiao, XY,Ren, XR,Wang, XH,et al. Porous TiAl3 intermetallics with symmetrical graded pore-structure fabricated by leaching space holder and thermal explosion process[J]. INTERMETALLICS,2018,95:144-149.
APA Jiao, XY.,Ren, XR.,Wang, XH.,Wang, SG.,Feng, PZ.,...&Feng, PZ .(2018).Porous TiAl3 intermetallics with symmetrical graded pore-structure fabricated by leaching space holder and thermal explosion process.INTERMETALLICS,95,144-149.
MLA Jiao, XY,et al."Porous TiAl3 intermetallics with symmetrical graded pore-structure fabricated by leaching space holder and thermal explosion process".INTERMETALLICS 95(2018):144-149.
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