Abstract
Abstract The results from transmission electron microscopy (TEM) microstructural studies of devitrified amorphous alloys with a composition Al88RE8Ni4 are presented as a function of average rare-earth atomic radii (between 1.76 and 1.87 A). Rare-earth elements RE [tbnd] Gd, Er and La were co-substituted to vary the average atomic radius rRE, while maintaining an 8 at.% rare-earth concentration. As reported previously for Al88La2Gd6Ni4 glasses, compositional phase separation prior to crystallization was observed in all alloys of this series. TEM examination of amorphous samples following low-temperature annealing treatments showed the development of strong image contrast prior to crystallization, corresponding to a segregation of the glassy matrix into aluminium-rich and solute-rich regions over a length scale of a few tens of nanometres. The subsequent crystallization behaviour depended on the average rare-earth radii, with metastable intermetallic phases forming first in glasses made with larger r RE and...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
