Porous TiAl3 intermetallics with symmetrical graded pore-structure fabricated by leaching space holder and thermal explosion process

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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.
刊名	INTERMETALLICS
	2018-04-01
卷号	95 页码:144-149
关键词	Ti-al Combustion Synthesis Heat-treatment Alloys Temperature Behavior Mode Foam
ISSN号	0966-9795
英文摘要	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.; 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.
学科主题	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National 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]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79394]
专题	金属研究所_中国科学院金属研究所
通讯作者	Feng, PZ (reprint author), China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China.
推荐引用方式 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.