Pore Structure Control and Characterization of Al Foam Prepared by NaCl Beads
Jia Jiangang; Jing Yongzhi; Liu Diqiang; Guo Tieming; Ji Genshun
2019-10
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume48Issue:10Pages:3275-3281
AbstractStarch, distilled water and NaCl powders as raw materials were mixed to form a colloidal salt paste and then thermally treated in 70 degrees C oil under vigorous stirring. Then highly spherical NaCl beads were obtained under the shear action of a blender. Afterwards, the "fried" NaCl beads with a particle size distribution of 0.4 similar to 2.4 mm were calcined and sintered at 740 degrees C, and thus the high purity NaCl beads with small amount of micro-pore (pores size 10 similar to 20 mu m) on the surface were obtained. The 0.6-1.0 mm salt beads were selected to form a "salt bed" in a steel die and the aluminum powder was filled into the "salt bed" gap via a tapping method by the Autotap instrument. The tapped mixture was cold pressed under 200 MPa to obtain the green compact parts. Then the salts were dissolved and removed in distilled water and three-dimensional open-cell green Al foam with controllable structure and high reproducibility was derived. After sintering at 460 degrees C for 2 h, the final Al foam was obtained and its relative density and porosity are 0.217 and 78.3%, respectively. The number of connectivity windows between cellular aluminum cells is 4 similar to 6 in average, and the window size is 120 similar to 200 mu m. The compressive load-displacement curve shows that the aluminum foam undergoes an elastic deformation stage, a plateau stress area, and a stress steep increase stage. The curve manifests the characteristics of foam metal compression mechanical properties, and its compressive strength and Young's modulus are 2.42 MPa and 0:38 GPa, respectively.
Keywordspace holder salt ball foams Al porous material powder metallurgy
Indexed BySCI
Language中文
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000494079600031
PublisherNORTHWEST INST NONFERROUS METAL RESEARCH
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/76638
Collection材料科学与工程学院
省部共建有色金属先进加工与再利用国家重点实验室
Corresponding AuthorJia Jiangang
AffiliationLanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Corresponding Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
First Signature AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Recommended Citation
GB/T 7714
Jia Jiangang,Jing Yongzhi,Liu Diqiang,et al. Pore Structure Control and Characterization of Al Foam Prepared by NaCl Beads[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(10):3275-3281.
APA Jia Jiangang,Jing Yongzhi,Liu Diqiang,Guo Tieming,&Ji Genshun.(2019).Pore Structure Control and Characterization of Al Foam Prepared by NaCl Beads.RARE METAL MATERIALS AND ENGINEERING,48(10),3275-3281.
MLA Jia Jiangang,et al."Pore Structure Control and Characterization of Al Foam Prepared by NaCl Beads".RARE METAL MATERIALS AND ENGINEERING 48.10(2019):3275-3281.
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