Synthesis of amorphous alloys and amorphous-crystalline composites in the Cu-Nb-Hf system by ion beam mixing

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3603013· OSTI ID:21538444

Luo, S Y; Cui, Y Y; Wang, T L; Ding, N; Li, J H; Liu, B X ^[1]

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1. Department of Materials Science and Engineering, Advanced Materials Laboratory, Tsinghua University, Beijing 100084 (China)

Seven sets of Cu-Nb-Hf multilayered films were designed and prepared with the overall compositions of Cu{sub 21}Nb{sub 65}Hf{sub 14}, Cu{sub 33}Nb{sub 49}Hf{sub 18}, Cu{sub 34}Nb{sub 34}Hf{sub 32}, Cu{sub 34}Nb{sub 10}Hf{sub 56}, Cu{sub 50}Nb{sub 23}Hf{sub 27}, Cu{sub 58}Nb{sub 10}Hf{sub 32}, and Cu{sub 70}Nb{sub 8}Hf{sub 22}, and an ion beam mixing experiment was then conducted using 200 keV xenon ions. It is found that the Cu-Nb-Hf system is a metallic glass forming one, and the single amorphous alloys could be synthesized in the Cu-Nb-based alloys with less than 18 at.% of Hf as a third addition. Also, when the Hf concentration is greater than 18 at.%, i.e., at the compositions of Cu{sub 34}Nb{sub 34}Hf{sub 32}, Cu{sub 34}Nb{sub 10}Hf{sub 56}, Cu{sub 50}Nb{sub 23}Hf{sub 27}, Cu{sub 58}Nb{sub 10}Hf{sub 32}, and Cu{sub 70}Nb{sub 8}Hf{sub 22}, ion beam mixing resulted in the formation of amorphous-crystalline composites, which might have better mechanical properties than single-phase glassy alloys. In addition, a detailed discussion was presented for the formation mechanism of the amorphous alloys and amorphous-crystalline composites.

• OSTI ID: 21538444
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 12; Other Information: DOI: 10.1063/1.3603013; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHOUS STATE
COMPOSITE MATERIALS
COPPER ALLOYS
CRYSTALS
DEPOSITION
HAFNIUM ALLOYS
ION BEAMS
KEV RANGE 100-1000
LAYERS
MASS BALANCE
METALLIC GLASSES
MIXING
NIOBIUM ALLOYS
SPATIAL DISTRIBUTION
SYNTHESIS
THIN FILMS
XENON IONS
ALLOYS
BEAMS
CHARGED PARTICLES
DISTRIBUTION
ENERGY RANGE
FILMS
IONS
KEV RANGE
MATERIALS
TRANSITION ELEMENT ALLOYS