Abstract
The morphology and orientation relationship of Ge precipitates in quenched and aged (QA) Al-0.04 to 1.20 at% Ge alloys and in the same composite alloys slowly cooled to room temperature (SC), have been investigated using transmission electron microscopy. The morphology of precipitates in the QA specimen depends on Ge concentration; octahedral shape in Al-0.04 at% Ge and plate- and rod-like ones in Al-0.4 to 1.20 at% Ge are predominant. Particularly, the observed octahedral precipitate with pure Ge phase has the anomalous orientation relationship: (001)Ge || (111)Al and [l10] Ge || [110] Al . In the SC specimen, a spherical precipitate with amorphous Ge phase has been observed. It is suggested that the nucleation of precipitates originates from vacancy aggregates in the QA specimen, and from Ge-vacancy complexes in the SC specimen, respectively.
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.
