Title

Low Temperature Phase Formation In Mechanically Alloyed Cu-Ga Powders

Keywords

Θ-CuGa phase 2; Mechanical alloying; Phase formation mechanism; X-ray diffraction

Abstract

The mechanism of formation of the θ-CuGa2 phase in binary Cu-Ga alloys has been investigated through MA of blended elemental powders by varying process variables such as milling time and milling temperature. The phase formation started even after milling for 2 min and was complete after 1 h of milling. Melting of Ga was noted in the early stages of milling, probably due to the rise in powder temperature. To discount the possibility that melting of Ga was responsible for the θ-phase formation, milling was conducted at lower temperatures by dripping liquid nitrogen on to the container. The θ-phase still formed, suggesting that its formation was not related to melting of Ga and that it had formed by a solid-state reaction even at low temperatures. The compositional homogeneity range of the θ-phase was also extended under MA conditions.

Publication Date

12-1-2005

Publication Title

Journal of Metastable and Nanocrystalline Materials

Volume

24-25

Number of Pages

193-196

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.4028/www.scientific.net/JMNM.24-25.193

Socpus ID

63849285300 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/63849285300

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