Hydrogenation of Ti50Zr25Co25 amorphous ribbons and its effect on their structural and mechanical properties

S. Jayalakshmi, E. Fleury, D. Y. Lee, H. J. Chang, D. H. Kim

Research output: Contribution to journalArticle

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Abstract

Changes in the structure and mechanical properties of Ti50Zr25Co25 melt-spun ribbons upon electrolytic hydrogenation have been investigated. Structural analyses of the as-spun ribbons revealed the sporadic presence of icosahedral (i) quasicrystalline short-range order (SRO) in the amorphous structure. Upon cathodic charging with hydrogen, the i-SRO vanished for a hydrogen content of about 21 at.% (hydrogen-to-metal atom ratio, H/M: 0.26), resulting in a fully amorphous structure. Simultaneously, the fracture strength was found to increase while the ribbons preserved their bending ductility. However, a significant reduction in the fracture strength and ductility of the ribbons was observed for hydrogen concentrations larger than 26 at.%. Variations in the mechanical stability are discussed based on a structure-property correlation.

Original languageEnglish
Pages (from-to)303-315
Number of pages13
JournalPhilosophical Magazine Letters
Volume88
Issue number4
DOIs
Publication statusPublished - 2008 Apr 1

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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