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HD+SPS多孔镁的制备及其组织性能研究
Microstructure and Properties of Porous Magnesium Fabricated by HD+SPS
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- DOI:
- 作者:
- 田笑颖 樊建锋 张华 张强 吴玉程 李卫国 董洪标 许并社
TIAN Xiaoying;FAN Jianfeng;ZHANG Hua;ZHANG Qiang;WU Yucheng;LIWeiguo;DONG Hongbiao;XU Bingshe
- 作者单位:
- 太原理工大学新材料界面科学与工程教育部重点实验室 太原理工大学先进镁基材料山西省重点实验室 莱斯特大学工程系
Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Advanced Magnesium Based Materials,Taiyuan University of Technology,Taiyuan 030024,China;Department of Engineering,University of Leicester,Leicester LE17RH,UK.
- 关键词:
- 多孔镁 HD+SPS 孔结构 压缩性能 吸能性能
porous magnesium hd+sps pore structure compression property energy absorption
- 摘要:
- 利用氢化脱氢(HD)+放电等离子烧结(SPS)工艺制备了多孔镁块体材料,研究了不同MgH2含量下多孔镁孔隙率、孔结构及压缩和吸能性能。结果表明,HD+SPS法制备的总孔隙率分别为7.5%和17.8%的多孔镁,且其孔径尺寸细小,内部组织均匀;孔隙率为17.8%的多孔镁具有相对较低的压缩屈服强度43 MPa,单位体积吸能较高,为34.04 MJ/m^3,最大能量吸收效率为1.42。17.8%孔隙率的多孔镁压缩应力-应变曲线较7.5%孔隙率的多孔镁有相对较低的屈服强度及较长的应力平台阶段,在能量吸收材料应用上更具优势。Porous magnesium block materials were prepared by hydrogenated dehydrogenation(HD)+discharge plasma sintering(SPS)process.The porosity,pore structure,compression and energy absorption properties of porous magnesium with different MgH2 contents were studied.The results show that the total porosity of porous magnesium is 7.5%and 17.8%respectively by HD+SPS method,and the pore size is small and the internal structure is uniform.Porous magnesium with a porosity of 17.8%has a relatively low compression yield strength of 43 MPa,high energy absorption per unit volume(34.04 MJ/m3),and a maximum energy absorption efficiency of 1.42.Compared with the porous magnesium with 7.5%porosity,the compressive stress-strain curve of porous magnesium with 17.8%porosity has a relatively low yield strength and a long stress platform stage,which is more advantageous in the application of energy-absorbing materials.