泡沫镁制备及抗压缩性能（英文）
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摘要
作为一种新型结构和功能材料,泡沫金属具有比实体金属更优异的性能。本研究利用粉末冶金造孔剂法成功制备了孔隙率为38.9%~57.5%泡沫镁。随着孔隙率从38.9%增加到57.5%时,其弹性模量由8.5 GPa下降到3.3 GPa,初始屈服应力从24.90 MPa下降到9.40 MPa。泡沫镁具有较低的初始屈服应力和较长的应力平台,因此,它可以作为优异的缓冲吸能材料。
As a new structural and functional material, metal foam has been proven to obtain excellent properties when compared with dense ones. In the present paper, the powder metallurgy with a space holder technique was used to prepare magnesium foam. The porosity of the foam ranges from 38.90% to 57.50%, when the elastic modulus decreases from 8.50 GPa to 3.30 GPa, and the initial yield stress decreases from 24.90 MPa to 9.40 MPa. The magnesium foam has lower yield stress and longer stress platform, so it can be used as good cushioning energy absorbing materials.
As a new structural and functional material, metal foam has been proven to obtain excellent properties when compared with dense ones. In the present paper, the powder metallurgy with a space holder technique was used to prepare magnesium foam. The porosity of the foam ranges from 38.90% to 57.50%, when the elastic modulus decreases from 8.50 GPa to 3.30 GPa, and the initial yield stress decreases from 24.90 MPa to 9.40 MPa. The magnesium foam has lower yield stress and longer stress platform, so it can be used as good cushioning energy absorbing materials.
引文
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2 Czaplicki M J,David C,Kevin H.US Patent,20040018353[P],2004
3 Ashby M F,Lu T J.Science in China Series B:Chemistry[J],2003,46(6):521
4 Martin B,Detlev S,Baur H.Advanced Engineering Materials[J],2000,2(4):196
5 Gibson L J,Ashby M F.Cellular Solids[M].Cambridge:Cambridge University Press,1999
6 Hartmann M,Reindel K,Singer R F.MRS Proceedings[C].San Francisco,CA:AMC,1998:211
7 Lefebvre,Louis P,John B et al.Proceedings of the Fifth International Conference on Porous Metals and Metallic Foams[C].Montreal Ca:PMMF,2007
8 Li C,Zhang Q M,Xu Z G et al.Acta Armamentarii[J],2009:S2:56
9 Staiger M P,Alexis M P,Jerawala H et al.Biomaterials[J],2006,27(9):1728
10 Lefebvre L P,John B,David D.Advanced Engineering Materials[J],2008,10(9):775
11 Yang H D,Hur B Y,Yang S R.Journal of Alloys and Compounds[J],2008,461(1):221
12 Sun X H.Thesis for Doctorate[D].Lanzhou:Lanzhou University of Technology,2005(in Chinese)
13 Li Q L.Thesis for Doctorate[D].Taiyuan:Taiyuan University of Science and Technology,2009(in Chinese)
14 Cheng H F,Han F S.Scripta Materialia[J],2003,49(6):583
15 Qiao P Z,Yang M J,Bobaru F.Journal of Aerospace Engineering[J],2008,21(4):235
16 Kou D P,Li J R,Yu J L et al.Scripta Materialia[J],2008,59(5):483