Hydrogen-induced amorphization in Ce-Al alloys

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00226-6· OSTI ID:382481

Li, X G; Chiba, A ^[1]; Aoki, K; Masumoto, T ^[2]

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1. Iwate Univ., Morioka, Iwate (Japan). Dept. of Materials Science and Technology
2. Tohoku Univ., Sendai (Japan). Inst. for Materials Research

Hydrogen-induced amorphization (HIA), i.e., formation of an amorphous phase by hydrogen absorption of intermetallic compounds, has been investigated in the last decade as a novel preparation method of amorphous alloys without liquid quenching. HIA is reported in many compounds, which are almost C15 Laves RM{sub 2} compounds (R = rare earth metal, M = ferromagnetic metal of Fe, Co, Ni). This leads to a question whether HIA is a popular phenomenon limited just to C15 Laves RM{sub 2} compounds. Recently, the present authors have shown that HIA occurs in many R-Al compounds (R = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er as well as Y). Furthermore, the behavior of amorphization from crystalline state and the behavior of crystallization from the corresponding amorphous state in R-Al alloys are fairly different from those in Laves RM{sub 2} compounds. For a more detail study as presented in this paper, Ce-Al alloys have been chosen because they are taken as representative. In the Ce-Al alloys, there are five intermetallic compounds. As CeAl{sub 3} and Ce{sub 3}Al{sub 11} seldom absorb hydrogen, this study will focus on Ce{sub 3}Al, CeAl and CeAl{sub 2}.

• OSTI ID: 382481
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 7 Vol. 35; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
AMORPHOUS STATE
CERIUM ALLOYS
CRYSTAL STRUCTURE
HEAT TREATMENTS
HYDROGEN
HYDROGENATION
INTERMETALLIC COMPOUNDS
MELTING
METALLURGICAL EFFECTS
SAMPLE PREPARATION
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION