D0I:10.13374/.issn1001-053x.2011.08.016 第33卷第8期 北京科技大学学报 Vol.33 No.8 2011年8月 Journal of University of Science and Technology Beijing Aug.2011 放电等离子烧结制备Mg2-Nd,Ni(x=0~0.3)储氢 合金 李 平)区万琦)DIN Rafi-ud'” 谢东辉》曲选辉，3) 1)北京科技大学材料科学与工程学院，北京1000832)北京北治功能材料有限公司，北京100192 3)北京市先进粉末治金材料与技术重点实验室，北京100083 ☒通信作者，E-mail:LiPing(@usth.edu.cm 摘要采用放电等离子烧结(SPS)工艺制备了Mg2-NdNi(x=0,0.1,0.2,0.3)储氢合金.通过X射线衍射(XRD)和扫描 电镜(SEM)研究了合金的相结构和表面形貌，利用等容压差法分析测试了合金的压力一组成一温度(PCT)曲线和吸放氢动力 学性能，研究了烧结温度、稀土元素N对储氢合金微观组织结构和储氢性能的影响，比较了SPS技术与真空感应熔炼法制备 的Mg基合金组织结构和储氢性能的异同.结果表明：SPS制备的Mg2.,Nd,Ni(x=0~O.3)系列储氢合金具有多相结构，储氢 合金的吸放氢动力学性能良好；Nd元素有利于Mg合金化，不利于储氢量：烧结温度对储氢量、PCT曲线平台性能有明显影 响；当Mg2.Nd,Ni系合金中含有Mg和NdMg2相，PCT曲线出现双平台现象：与铸态合金相比，SPS制备的Mg1.,Nda,Ni储氢 合金的吸放氢动力学性能较好，但储氢容量、放氢率和PCT曲线平台性能更差. 关键词储氢合金：镁合金：放电等离子烧结(SPS):储氢：微观组织：稀土 分类号TG139+.7 Preparation of Mg2_,Nd,Ni (x=0-0.3)hydrogen storage alloys by spark plas- ma sintering LI Ping,WAN Qi,DIN Rafi-ud,XIE Dong-hui,QU Xuan-hui) 1)School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Beijing Beiye Functional Materials Corporation,Beijing 100192,China 3)Beijing Key Lab of Advanced Powder Metallurgy Materials and Technologies,Beijing 100083,China Corresponding author,E-mail:LiPing@ustb.edu.en ABSTRACT The effects of sintering temperature and rare element Nd on the phase structures,morphology,pressure-composition- temperature (PCT)curves and hydrogen absorption/desorption kinetics characteristics of Mg2 Nd,Ni(x=0,0.1,0.2,0.3)alloys prepared by spark plasma sintering (SPS)were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM)and PCT experiments.The structures and hydrogen storage properties of the Mg-based alloys prepared by SPS and vacuum induction melting were compared.It is shown that Mg2.Nd,Ni alloys prepared by SPS exhibit a multiphase structure,demonstrating better hydrogen ab- sorption/desorption kinetics performances but deterioration in hydrogen storage capacity with increasing Nd content,and Mg alloying is prompted by Nd.Sintering temperature has an obviously effect on the hydrogen storage capacity and the plateau properties of PCT curves.When Mg2.Nd,N alloys contain Mg or NdMg2 phase,their PCT curves exhibit two platforms.Compared with the alloys pre- pared by casting,the Mg.7Ndo.3 Ni hydrogen storage alloy prepared by SPS has better absorption/desorption kinetics properties but aw- ful hydrogen storage capacity,hydrogen desorption rate and platform properties of PCT curves. KEY WORDS hydrogen storage alloys:magnesium alloys:spark plasma sintering (SPS):hydrogen storage:microstructure:rare earths MgN储氢合金由于具有储氢容量高、资源丰富、质量轻和对环境污染小等优点，受到人们的广泛 收稿日期：201103一17 基金项目：广东省教有部产学研项目(2009B090300147)第 33 卷 第 8 期 2011 年 8 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 33 No． 8 Aug． 2011 放电等离子烧结制备 Mg2 － x Ndx Ni( x = 0 ～ 0. 3) 储氢 合金 李 平1)  万 琦1) DIN Rafi-ud1) 谢东辉2) 曲选辉1，3) 1) 北京科技大学材料科学与工程学院，北京 100083 2) 北京北冶功能材料有限公司，北京 100192 3) 北京市先进粉末冶金材料与技术重点实验室，北京 100083  通信作者，E-mail: LiPing@ ustb． edu． cn 摘 要 采用放电等离子烧结( SPS) 工艺制备了 Mg2 － xNdxNi( x = 0，0. 1，0. 2，0. 3) 储氢合金． 通过 X 射线衍射( XRD) 和扫描 电镜( SEM) 研究了合金的相结构和表面形貌，利用等容压差法分析测试了合金的压力--组成--温度( PCT) 曲线和吸放氢动力 学性能，研究了烧结温度、稀土元素 Nd 对储氢合金微观组织结构和储氢性能的影响，比较了 SPS 技术与真空感应熔炼法制备 的 Mg 基合金组织结构和储氢性能的异同． 结果表明: SPS 制备的 Mg2 － xNdxNi( x = 0 ～ 0. 3) 系列储氢合金具有多相结构，储氢 合金的吸放氢动力学性能良好; Nd 元素有利于 Mg 合金化，不利于储氢量; 烧结温度对储氢量、PCT 曲线平台性能有明显影 响; 当 Mg2 － xNdxNi 系合金中含有 Mg 和 NdMg12相，PCT 曲线出现双平台现象; 与铸态合金相比，SPS 制备的 Mg1. 7Nd0. 3Ni 储氢 合金的吸放氢动力学性能较好，但储氢容量、放氢率和 PCT 曲线平台性能更差． 关键词 储氢合金; 镁合金; 放电等离子烧结( SPS) ; 储氢; 微观组织; 稀土 分类号 TG139 + . 7 Preparation of Mg2 － xNdxNi ( x =0 －0. 3) hydrogen storage alloys by spark plas￾ma sintering LI Ping1)  ，WAN Qi 1) ，DIN Rafi-ud1) ，XIE Dong-hui 2) ，QU Xuan-hui 1，3) 1) School of Materials Science and Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Beijing Beiye Functional Materials Corporation，Beijing 100192，China 3) Beijing Key Lab of Advanced Powder Metallurgy Materials and Technologies，Beijing 100083，China  Corresponding author，E-mail: LiPing@ ustb． edu． cn ABSTRACT The effects of sintering temperature and rare element Nd on the phase structures，morphology，pressure-composition￾temperature ( PCT) curves and hydrogen absorption /desorption kinetics characteristics of Mg2 － xNdxNi( x = 0，0. 1，0. 2，0. 3) alloys prepared by spark plasma sintering ( SPS) were investigated by X-ray diffraction ( XRD) ，scanning electron microscopy ( SEM) and PCT experiments． The structures and hydrogen storage properties of the Mg-based alloys prepared by SPS and vacuum induction melting were compared． It is shown that Mg2 － xNdxNi alloys prepared by SPS exhibit a multiphase structure，demonstrating better hydrogen ab￾sorption /desorption kinetics performances but deterioration in hydrogen storage capacity with increasing Nd content，and Mg alloying is prompted by Nd． Sintering temperature has an obviously effect on the hydrogen storage capacity and the plateau properties of PCT curves． When Mg2 － xNdxN alloys contain Mg or NdMg12 phase，their PCT curves exhibit two platforms． Compared with the alloys pre￾pared by casting，the Mg1. 7Nd0. 3Ni hydrogen storage alloy prepared by SPS has better absorption /desorption kinetics properties but aw￾ful hydrogen storage capacity，hydrogen desorption rate and platform properties of PCT curves． KEY WORDS hydrogen storage alloys; magnesium alloys; spark plasma sintering ( SPS) ; hydrogen storage; microstructure; rare earths 收稿日期: 2011--03--17 基金项目: 广东省教育部产学研项目( 2009B090300147) Mg2Ni 储氢合金由于具有储氢容量高、资源丰 富、质量轻和对环境污染小等优点，受到人们的广泛 DOI:10.13374/j.issn1001-053x.2011.08.016