Abstract
Mechanical properties of structural intermetallics are very sensitive to chemical composition and to microstructure. Mechanical alloying is here applied to (Ti + 22Al + 23Nb) and (TiH 2 + 22Al + 23Nb) mixtures in order to tailor both chemical and microstructural homogeneity and to refine powder size, for the synthesis of high quality Ti 2AlNb-based intermetallics. Crystal structure and phase evolution during mechanical alloying were investigated by means of X-ray diffraction and Rietveld analysis. It was identified that milling of the (Ti + 22Al + 23Nb) mixture led to the formation of a bcc (Nb, Ti, Al) solid solution, which was further confirmed by TEM analysis. Replacing pure Ti with TiH 2 resulted in the formation of a bcc (Nb, Ti, Al)H x solid solution. Prolonged milling led to the transformation of a mixture of the bcc-(Nb, Ti, Al)H x solid solution and an fcc-TiH 2 into a fully amorphous phase. Selected area electron diffraction confirmed this finding. An EDS analysis showed that the amorphous phase was a (Ti, Nb, Al)H x solid solution.
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.
