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  • 1
    Electronic Resource
    Electronic Resource
    Ultrasonic attenuation in Zr41Ti14Cu12.5Ni10−xBe22.5Cx (x=0,1) bulk metallic glasses under high pressure (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 3266-3268 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The pressure dependence of ultrasonic attenuation in Zr41Ti14Cu12.5Ni10−xBe22.5Cx (x=0,1) bulk metallic glasses has been studied up to 0.5 GPa by using a pulse echo overlap method. The effect of carbon addition on the attenuation is also investigated. Some unique characteristics of the ultrasonic attenuation are found and compared with those of other glasses. The origin of the anomalous attenuation behavior is discussed. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1289237
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of relaxation on glass transition and crystallization of ZrTiCuNiBe bulk metallic glass (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 8209-8211 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Differential scanning calorimetry is used as the main method to investigate the effects of relaxation on the glass transition and crystallization of Zr41Ti14Cu12.5Ni10Be22.5 bulk metallic glass. It is found that the glass transition and crystallization behavior as well as their apparent activation energy are markedly affected by the preannealing induced relaxation. The relation between the glass transition, crystallization kinetics, and the structural relaxation is explored. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.373523
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  • 3
    Electronic Resource
    Electronic Resource
    Collective interdiffusion in compositionally modulated multilayers (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 4262-4266 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Interdiffusion in Fe–Ti, Ag–Bi, Fe–Mo, Ni–Si, Mo–Si, Nb–Si, and Ag–Si multilayers (MLs) was investigated by an in situ low-angle x-ray diffraction technique. Temperature-dependent interdiffusivities were obtained which can be described as Arrhenius relations. The interdiffusion characteristics of the MLs were summarized. The extremely small values of the prefactor D0 and the marked correlation between the D0 and activation energy He for interdiffusion suggest that a collective atomic jumping mechanism involving 8–15 atoms govern the interdiffusion in the MLs. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371355
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  • 4
    Electronic Resource
    Electronic Resource
    Role of small atoms in the formation and properties of Zr–Ti–Cu–Ni–Be bulk amorphous alloys (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 5961-5968 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The formation, thermal stability and mechanical properties of ZrTiCuNiBe bulk amorphous alloy were investigated by means of x-ray diffraction, differential scanning calorimetry and microhardness measurements. The amorphous alloys Zr41Ti36.5−xCu12.5Ni10Bex in the composition range 15≤x≤32 at. % were prepared to investigate the role of Be in the glass forming ability. It is found that the formation, crystallization, and thermal properties of the amorphous alloy are sensitive to the addition of small sized atoms of Be. The amorphous alloy becomes more stable with increasing Be contents. A small amount of carbon addition can further extend the supercooled liquid range and enhance the strength of the alloy. More carbon additions result in the formation of a crystalline/amorphous mixture accompanied by a pronounced increase in strength. The role of Be and C in the excellent glass former alloys is discussed in terms of the thermodynamic and microstructural aspects. The decomposition phenomenon in the Zr41Ti14Cu12.5Ni10Be22.5 alloy is interpreted based on the experimental results. The effects of carbon on the strength of the alloy are discussed from a structural point of view. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368891
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  • 5
    Electronic Resource
    Electronic Resource
    Glass transition behavior, crystallization kinetics, and microstructure change of Zr41Ti14Cu12.5Ni10Be22.5 bulk metallic glass under high pressure (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 3914-3918 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Glass transition behavior, crystallization kinetics, and the microstructural change of Zr41Ti14Cu12.5Ni10Be22.5 bulk metallic glass (BMG) are studied in ambient, annealing, and high pressure conditions. Significant structural relaxation induced by preannealing and high pressure annealing has been observed in the BMG obtained with a low cooling rate. The experimental results indicate that the BMG contains a large amount of vacancy-like free volume. The relaxation results in the microstructural transformation from short-range order to medium-range order and significant effects on the subsequent glass transition and crystallization. The role of relaxation in the glass transition and the crystallization is phenomenologically explained. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1290262
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  • 6
    Electronic Resource
    Electronic Resource
    Microstructure studies of Zr41Ti14Cu12.5Ni10Be22.5 bulk amorphous alloy by electron diffraction intensity analysis (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 71 (1997), S. 1053-1055 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Reduced density function analyses for the bulk amorphous alloy Zr41Ti14Cu12.5Ni10Be22.5 and its decomposition and crystallization have been made by means of electron diffraction intensity measurement with imaging plate. The local atomic structure of the amorphous alloy as well as its development in the course of the decomposition and crystallization is described from the analysis of the atomic distribution function. The origin of the high thermal stability and the large glass forming ability of the alloy as well as the effect of the decomposition on the crystallization is discussed from the viewpoint of the local atomic structure characteristics of the alloy. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.119725
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  • 7
    Electronic Resource
    Electronic Resource
    Elastic constants and their pressure dependence of Zr41Ti14Cu12.5Ni9Be22.5C1 bulk metallic glass (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 1803-1805 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The acoustic velocities and their pressure dependence of bulk Zr41Ti14Cu12.5Ni9Be22.5C1 metallic glass (MG) have been measured up to 0.5 GPa by using a pulse echo overlap method. The elastic constants and thermodynamic parameters as well as their pressure dependence of the MG have been determined. The obtained elastic constants were compared to that of other kinds of glasses. More information about the microstructure, elastic properties, and glass forming ability of the MG was obtained. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.123091
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  • 8
    Electronic Resource
    Electronic Resource
    Enhanced thermal stability and microhardness in Zr–Ti–Cu–Ni–Be bulk amorphous alloy by carbon addition (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 71 (1997), S. 58-60 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of carbon addition on thermal stability and hardness of Zr41Ti14Cu12.5Ni10Be22.5 bulk amorphous alloy were investigated. It is found that a small amount of carbon addition further extends the supercooled liquid range and enhances the thermal stability and strength of the alloy. More carbon addition results in the formation of a crystalline and amorphous mixture accompanied by a pronounced increase in microhardness. The effects of the carbon addition on the amorphous alloy are discussed from the structural point of view. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.119468
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  • 9
    Electronic Resource
    Electronic Resource
    Crystallization kinetics and glass transition of Zr41Ti14Cu12.5Ni10−xFexBe22.5 bulk metallic glasses (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2392-2394 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The crystallization kinetics and glass transition behavior of Zr41Ti14Cu12.5Ni10−xFexBe22.5 (x=0, 2, and 5) bulk metallic glasses (BMGs) have been investigated by means of differential scanning calorimeter under nonisothermal conditions. The glass transition temperature Tg, the onset crystallization temperature Tx, and the crystallization peak temperature Tpi of the BMGs are found to depend on the heating rate during the continuous heating. The effective activation energy and the frequency factor of the glass transition and crystallization of the BMGs are determined by the Kissinger method. The glass forming ability of the glass forming alloys has been discussed in view of the crystallization kinetics. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125024
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  • 10
    Electronic Resource
    Electronic Resource
    Nanocrystallization of ZrTiCuNiBeC bulk metallic glass under high pressure (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2770-2772 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nanocrystallization of Zr41Ti14Cu12.5Ni9Be22.5C1 bulk metallic glass (BMG) under high pressure is investigated. It is found that the nanocrystallization is pressure assisted, and the primary nanocrystallization temperature decreases as the applied pressure increases. Pressure annealing of the BMG in the supercooled liquid region produces a composite with dispersion of very fine nanocrystallites in the amorphous matrix. A fully nanocrystallization is obtained by pressure annealing under 6 GPa at 723 K. The pressure also controls the phase selection during the crystallization. The mechanism for the pressure-assisted nanocrystallization is discussed. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125144
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