高能球磨LaNi5-41%Mg合金的相组成与热稳定性研究

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材料工程 ›› 2004, Vol. 0 ›› Issue (1) : 38-41.

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研究与应用

高能球磨LaNi₅-41%Mg合金的相组成与热稳定性研究

蒙冕武^1,3, 刘心宇^1,2, 成钧², 周怀营²

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Phase Composition and Thermal Stability of LaNi₅-41%MgAlloy Prepared by High Energy Ball Milling

MENG Mian-wu^1,3, LIU Xin-yu^1,2, CHENG Jun², ZHOU Huai-ying²

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摘要

采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、差热分析(DTA)等方法研究了高能球磨及热处理对新型合金LaNi₅-41%Mg(质量分数)的组织形貌、结构变化及热稳定性能的影响.结果表明:经280r/min球磨250h后,LaNi₅-41%Mg样品由镧、镁和镍等非晶以及微量的晶体Mg和Mg₂Ni组成;所得的粉末形状大多数为规则的近球形或球形,颗粒直径为0.1～15.2μm,其中87%的颗粒直径为0.1～2μm.球磨样品经763K保温35d后,得到热稳定性较好的由纳米Mg₂NiLa,Mg₂Ni,Mg₁₇La₂三相组成的合金,其平均晶粒直径为26.9nm.

Abstract

The LaNi₅-41%Mg(mass fraction)alloy was prepared by the high energy ball milling,the phase composition and thermal stability of the alloy were investigated by means of the X-ray diffraction(XRD),scanning electron microscope(SEM),differential thermal analysis(DTA).The results show that,besides small amounts of Mg and Mg₂ Ni phases,the amorphous La,Mg,Ni can be obtained after ball milling at 280r/min for 250h,and the shape of particles is spheroid or sphere.The size of particles is 0.1～15.2μm.After heat treatment at 763K for 35d,the as-milled LaNi₅-41%Mg alloy is stable and consists of Mg₂NiLa,Mg₂Ni,Mg₁₇La₂ phases with the average grain size of 26.9nm.

导出引用

蒙冕武, 刘心宇, 成钧, 周怀营. 高能球磨LaNi₅-41%Mg合金的相组成与热稳定性研究[J]. 材料工程, 2004, 0(1): 38-41

MENG Mian-wu, LIU Xin-yu, CHENG Jun, ZHOU Huai-ying. Phase Composition and Thermal Stability of LaNi₅-41%MgAlloy Prepared by High Energy Ball Milling[J]. Journal of Materials Engineering, 2004, 0(1): 38-41

中图分类号： TG146

参考文献

[1] SCHMID J,SOMMER F.Heat capacity of liquid La-Mg-Ni alloys [J].Journal of Alloys and Comp,1998,266:216-223.
[2] KOHNO T,YOSHIDA H,KAWASHIMA F,et al.Hydrogen storage properties of new ternary system alloys:La₂MgNi₉,La₅Mg₂Ni₂₃,La₃MgNi₁₄ [J].Journal of Alloys and Comp,2000,311:L5-L7.
[3] NAGAE H,TOMIZAWA H,OGASWARA T,et al.Hydriding characteristics of Mg-Xwt% LaNi₅ sintered alloys [J].Journal of Less Common Metals,1990,157:15-19.
[4] SAIRAMANSS,DAVIDONKJ,SRIVASTAVAON.Onthe synthesis,characterization and hydrogenation behaviour of Mgbases composite materials Mg-Xwt.% CFMmNi₅ prepared through mechanical alloying [J].Journal of Alloys and Comp,1999,292:202-211.
[5] IMAMURA H,SAKASAI N,KAJII Y.Hydrogen absorption of Mg-based composites prepared by mechanical milling [J].Journal of Alloys and Comp,1996,232:218-223.
[6] BERLOUIS L E A,CABRERA E,HALL-BARIENTOSSS E,et al.A thermal analysis investigation of the hydriding properties of mamocrystalline Mg-Ni based alloys prepared by high energy ball milling [J].Journal of Alloys and Comp,2000,305:82-89.
[7] GROSS K J,SPATZ P,ZUTTEL A,et al.Mechanically milled Mg composites for hydrogen storage-the transition to a steady state composition [J].Journal of Alloy and Comp,1996,240:206-209.
[8] ABDELLAOUOI M,CRACCO D,PERCHERON G A.Structure characterization and reversible hydrogen absorption properties of Mg₂Ni rich nanocomposite materials synthesized by mechanical alloying [J].Journal of Alloys and Compounds,1998,268:233-240.