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  • 1
    Electronic Resource
    Electronic Resource
    Tracer diffusion of 110Ag in YBa2Cu3O7−δ (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 2523-2525 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Tracer diffusion of 110Ag in YBa2Cu3O7−δ has been measured in the temperature range 800–950 °C using serial sectioning. The polycrystalline samples were made either from a powder containing about 0.2% Zr prepared by a conventional technique, or from a purer powder that had been calcined in low-pressure oxygen. Concentration profiles indicate both a volume and a fast diffusivity path contribution to diffusion. The activation energies were 227±3 and 249±17 kJ/mole for samples made from powder calcined in low-pressure oxygen and conventional powder, respectively. Diffusion was slower in the samples made from the purer powder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346472
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  • 2
    Electronic Resource
    Electronic Resource
    Oxygen diffusion in cuprate superconductors (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 5615-5628 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Superconducting properties of the cuprate superconductors depend on the oxygen content of the material; the diffusion of oxygen is thus an important process in the fabrication and application of these materials. In the present article, we review studies of the diffusion of oxygen in La2−xSrxCuO4, YBa2Cu3O7−δ, YBa2Cu4O8, and the Bi2Sr2Can−1CunO2n+4 (n=1 or 2) superconductors, and attempt to elucidate the atomic mechanisms responsible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357067
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  • 3
    Electronic Resource
    Electronic Resource
    Note on solid-state reaction kinetics: The formation of silicides in ternary systems (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 2073-2073 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The decrease of the formation rate of Ni2Si from Ni-Cr alloys as opposed to its formation from pure Ni is analyzed in terms of a paper published by Carl Wagner in 1952. Some possible ternary diffusion effects are pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335967
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Tracer diffusion of 110Ag in Bi2Sr2CaCu2Ox (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 2291-2293 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Tracer diffusion of 110Ag in dense polycrystalline Bi2Sr2CaCu2Ox has been measured at temperatures from 600 to 800 °C at an oxygen pressure of 105 Pa, and in oxygen partial pressures from 103 to 105 Pa at 700 °C. The diffusivity of Ag in Bi2Sr2CaCu2Ox is given by D=(8.9−4.2+7.9)exp[−(181.4±4.8 kJ/mol)/RT] cm2/s, and is not a sensitive function of oxygen partial pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107033
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of yttrium additions on the oxidation of nickel (1985)
    Springer
    Oxidation of metals 24 (1985), S. 133-148 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; nickel ; yttrium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The oxidation of Ni, Ni-0.1 wt.% Y, and Ni-0.3 wt.% Y alloys was carried out in the temperature range 500–900°C at pO 2= 1 atm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00664229
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of yttrium additions to nickel on the volume and grain boundary diffusion of Ni in the scale formed on the alloy (1985)
    Springer
    Oxidation of metals 24 (1985), S. 115-132 
    Details
    ISSN: 1573-4889
    Keywords: grain boundary diffusion ; nickel oxide ; oxidation ; active element
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract NiO scales were formed on pure Ni and Ni-0.1 wt.% Y alloy by oxidation in pure O2 at 1200°C, and the grain boundary self-diffusion coefficients of Ni in the dense region of the scale were measured by the tracer-sectioning technique. The volume diffusion coefficient was also measured in the alloy scale. The grain boundary and volume diffusion coefficients and the grain boundary width were found to be the same for the two materials within the experimental uncertainty.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00664228
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    Paper (German National Licenses)
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