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Author Fan, Cang ♦ Li, Chunfei ♦ Inoue, Akihisa ♦ Haas, Volker
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword MATERIALS SCIENCE ♦ CALORIMETRY ♦ CRYSTALLIZATION ♦ GLASS ♦ METALLIC GLASSES ♦ PHYSICS ♦ PRECIPITATION ♦ TRANSITION TEMPERATURE
Abstract This work shows that the crystallization process of Zr--Ni--Cu--Al metallic glass is greatly influenced by adding Nb as an alloying element. Based on the results of the differential scanning calorimetry experiments for metallic glasses Zr{sub 69-x}Nb{sub x}Ni{sub 10}Cu{sub 12}Al{sub 9} (x=0--15at.%), the crystallization process takes place through two individual stages. For Zr{sub 69}Ni{sub 10}Cu{sub 12}Al{sub 9} (x=0), metastable hexagonal {omega}-Zr and a small fraction of tetragonal Zr{sub 2}Cu are precipitated upon completion of the first exothermic reaction. Contrary to this alloy, the precipitation of a nanoquasicrystalline phase is detected when 5--10 at.% Nb is added. Furthermore, the crystallization temperature T{sub x}, supercooled liquid region {Delta}T{sub x} and reduced temperature T{sub g}/T{sub L} (T{sub g} is the glass transition temperature, T{sub L} the liquidus temperature) increase with increasing Nb content. These results indicate that adding Nb content to Zr--Ni--Cu--Al metallic glasses not only induces quasicrystalline phase formation, but also enhances glass-forming ability. {copyright} 2001 American Institute of Physics.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-08-13
Publisher Place United States
Journal Applied Physics Letters
Volume Number 79
Issue Number 7


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