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  • 1
    Electronic Resource
    Electronic Resource
    Fast diffusion and metallic glass formation in zirconium-metal alloys (1986)
    Springer
    Journal of materials science 21 (1986), S. 64-70 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In this work it was found for a range of zirconium-metal alloys that the differences in atomic size, eIectronegativity and valence of the metals with respect to zirconium, and the extent of the mutual solid solubility act as phenomenological connections between the fast diffusion of the metal in zirconium and the ability of the zirconium-metal alloy to form glasses. It was found that all the alloys of zirconium which exhibit fast diffusion are also able to form glasses. Only metallic glasses obtained by rapid quenching from the melt were considered. The analysis was performed using two criteria to evaluate the glass-forming ability of the alloy, the criteria to ascertain those metals that can behave as fast-diffusing solutes in zirconium and the data for heterodiffusion in zirconium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01144700
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Cu2Mg-CuMg2-Mg2Sn ternary eutectic (1996)
    Springer
    Journal of materials science 15 (1996), S. 1690-1696 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00636197
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  • 3
    Electronic Resource
    Electronic Resource
    Theoretical calculation of the amorphous alloy range of the Mg-Cu system (1992)
    Springer
    Journal of materials science 27 (1992), S. 4935-4939 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The enthalpy and free energy of competing phases-metastable solid solution, amorphous alloy and structurally simple compounds-of the Mg-Cu system were calculated by using a semiempirical theory by Miedema and Niessen and by Lopezet al. which is based on thermodynamic considerations. These enthalpy and free energy diagrams reproduce well the range of complete amorphization caused by rapid quenching from the melt, as experimentally measured in a previous work by Sommeret al.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01105256
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Free-energies of the Ti-Ni, Fe-Ni and Mo-Ni alloys in relation to their behaviour under particle irradiation (1996)
    Springer
    Journal of materials science 31 (1996), S. 6395-6402 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The metastable free-energy diagrams of the Ti-Ni, Fe-Ni and Mo-Ni systems were calculated at room temperature using a semiempirical theory based on thermodynamic considerations. Ti-Ni and Mo-Ni form equilibrium-ordered compounds that are destabilized by particle irradiation. Effectively, Ti2Ni, TiNi, MoNi and MoNi3 amorphize after irradiation. In the present work, this experimental behaviour is understood by considering the modification of the free-energy diagrams after particle irradiation. Conversely, in the Fe-Ni system, a metastable f c c solid solution evolves under irradiation towards ordered FeNi. In this system, according to our calculation, the free-energy of the amorphous phase is much higher than the free-energy of any other competing phase, so the amorphous phase cannot be produced. Each selected alloy has an intermetallic compound (TiNi3, FeNi3 and MoNi4) which does not amorphize by particle irradiation and whose composition is close to the nickel-rich end of the phase diagram. According to the calculated free-energy diagrams, the reason for this impossibility of amorphization would be the competition of the terminal solid solution with the amorphous phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356241
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  • 5
    Electronic Resource
    Electronic Resource
    Thermodynamic analysis of irradiation-induced amorphization of intermetallic particles in Zircaloy (1995)
    Springer
    Journal of materials science 30 (1995), S. 196-200 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The intermetallic precipitate particles Zr2(Ni, Fe) in Zircaloy-2 and Zr(Cr, Fe)2 in Zircaloy-4, dissolve and amorphize under irradiation. Pursuing a previous analysis by Motta and Lemaignan, we have studied those effects on the basis of the metastable free-energy diagram of the reference system Zr-Fe (calculated using Miedema's model) and considering some aspects of the modification of this free-energy diagram by irradiation. We then can explain why both phases Zr2(Ni, Fe) and Zr(Cr, Fe)2 can be amorphized at low temperatures (below 350 K) without composition changes if sufficient energy can be accumulated by irradiation-produced defects and chemical disorder, and also that at intermediate temperatures (about 580 K) a driving force exists for particle amorphization at the matrix-particle interface for Zr(Cr, Fe)2 but not for Zr(Ni, Fe)2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352150
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  • 6
    Electronic Resource
    Electronic Resource
    An experimental and theoretical study of the glass-forming region of the Mg-Cu-Sn system (1995)
    Springer
    Journal of materials science 30 (1995), S. 40-46 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The amorphization of Mg-Cu-Sn alloys with various compositions has been studied using the melt-spinning technique, with particular emphasis on the magnesium-rich corner of the ternary phase diagram. The results have been interpreted in terms of Miedema's theory, which highlights competition between the amorphous phase and crystalline solid solutions. Competition by ordered intermetallic compounds has also to be considered in order to explain the restricted amorphization region found in these experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352129
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    Paper (German National Licenses)
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