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.
Bibliographical noteFunding Information:
The authors would like to dedicate this work to the late Dr Kim Ki-Bae, who passed away at a very early age. This research was supported by the New & Renewable Energy Center under the Korea Energy Management Corporation (KEMCO) of the Ministry of Commerce, Industry and Energy, under contract No. 2005-N-CO02-P-02-0-000 and the Global Research Program of the Korean Ministry of Science and Technology.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics