Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-07-01

Journal: ADVANCED ENGINEERING MATERIALS

Included Journals: EI、SCIE、Scopus

Volume: 13

Issue: 7,SI

Page Number: 616-620

ISSN: 1438-1656

Abstract: This manuscript gives the first results of an ongoing research project focusing on the crystallization processes of Zr(65)Al(7.5)Ni(10)Cu(17.5) (Z1) and Zr(58)Al(16)Ni(11)Cu(15) (Z2) bulk metallic glasses. Crystallization, induced by ball-milling and thermal annealing, has been observed and compared using differential scanning calorimetry, X-ray diffraction and Raman spectroscopy. The thermal crystallization end-products obtained for the two alloys were different: tetragonal Zr(2)Cu and hexagonal Zr(6)Al(2)Ni for Z1, while Z2 contained hexagonal Zr(2)Al, big cubic Zr(2)Ni and some alpha-Zr solid solution. For both alloys, the thermal crystallization products were different from those obtained after ball-milling. Interestingly, however, the stable phase obtained after sufficient mechanical milling was an FCC phase for both alloys. Raman spectroscopy suggests that nitrogen has an effect on the formation of this stable final product.