Phase components and hydriding properties of the sintered Mg-xwt.% LaNi5 (x=20-50) composites

Dalin Sun, H. Enoki, M. Bououdina, Etsuo Akiba

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37 Citations (Scopus)

Abstract

Powder mixtures of magnesium and LaNi5 with nominal composition Mg-x wt.% LaNi5 (x=20-50) were pressed into pellets and sintered at 973 K for 1 h. After sintering, it was found that when x=20-40 the major phases were pure Mg, Mg2Ni and La2Mg17, including small amounts of MgO. Further increasing x to 50, Mg2Ni and La2Mg17 remained the major phases but pure magnesium disappeared. In contrast to previously published results, the LaMg12 phase was not found in the above composition range. The phase abundance as a function of composition was quantitatively determined by Rietveld analysis. It was also found that changing the sintering temperature from 723 to 973 K did not change the resultants of the sintered Mg-50 wt.% LaNi5 composite as well as their relative amounts. All samples were easily activated at 623 K, and their pressure-composition isotherms of hydrogenation were measured at 573 K.

Original languageEnglish
Pages (from-to)252-257
Number of pages6
JournalJournal of Alloys and Compounds
Volume282
Issue number1-2
DOIs
Publication statusPublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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