Journal ArticleDOI
A quantitative demonstration of the grain boundary diffusion mechanism for the oxidation of metals
TLDR
In this article, the authors report measurements of the oxide scale thickness and oxide grain size as a function of time during the oxidation of high-purity nickel in the temperature range 500-800°C.Abstract:
Below 1000°C the oxidation of nickel cannot be controlled by the diffusion of ions through the bulk crystal lattice of the pure oxide, because the measured oxidation rates are several orders of magnitude faster than would be predicted on this basis. Short-circuit diffusion through oxide grain boundaries or dislocations has usually been held responsible, but there has hitherto been no proper quantitative confirmation of this mechanism. We report measurements of the oxide scale thickness and oxide grain size as a function of time during the oxidation of high-purity nickel in the temperature range 500–800°C. All the oxidation experiments were carried out in pure oxygen at a pressure of one atmosphere. The measured parabolic oxidation rate constants have been compared with those calculated from grain boundary diffusion data obtained in our previous work, using a grain boundary diffusion model for the oxidation process. The quantitative agreement between measured and calculated oxidation rates shows c...read more
Citations
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Structural, electronic, and elastic properties of orthorhombic, hexagonal, and cubic Cu3Sn intermetallic compounds in Sn–Cu lead-free solder
TL;DR: In this article, the phase stabilities and mechanical properties of Cu3Sn compounds were investigated based on their formation enthalpy and cohesive energy, and the results indicated that the phase stability of the Cu3sn intermetallic compounds follow the order of: o-Cu3sn-Cmcm where c-cu3sn is energetically unstable.
Journal ArticleDOI
Structural, elastic, electronic and optical properties of the newly synthesized monoclinic Zintl phase BaIn2P2
TL;DR: In this paper, the structural, elastic, electronic and optical properties of the newly synthesized monoclinic Zintl phase BaIn2P2 using a pseudopotential plane-wave method in the framework of density functional theory within the generalized gradient approximation were investigated.
Journal ArticleDOI
Oxygen transport during the high temperature oxidation of pure nickel
TL;DR: In this paper, the high temperature oxidation of nickel has been investigated in air under atmospheric pressure in the temperature range 600-900°C and it has been found that oxygen transport through the NiO scale had to be taken into consideration during the oxidation process.
Journal ArticleDOI
A first-principles study on the structural, elastic, electronic, optical, lattice dynamical, and thermodynamic properties of zinc-blende CdX (X = S, Se, and Te)
TL;DR: In this article, the structural stability, elastic, electronic, optical, vibrational, and thermodynamic properties of cubic compounds CdX ( X ǫ = S/Se/Te) in zinc-blende structure have been investigated using a pseudopotential plane wave (PP-PW) method within the generalized gradient approximation (GGA) and the local density approximation (LDA).
Journal ArticleDOI
First-principles investigation of structural stability, mechanical and thermodynamic properties of Pt3Zr5 compounds
TL;DR: In this paper, the structural stability, mechanical and thermodynamic properties of Pt3Zr5 compounds were investigated and it was shown that the hexagonal phase is more thermodynamically stable than the other three phases.
References
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Journal ArticleDOI
Beitrag zur Theorie des Anlaufvorgangs
TL;DR: The Mechanismus des Diffusionsvorgangs is still weitgehend unbekannt as discussed by the authors, i.e., the Diffusion of mindestens einem der beiden Bestandteile durch die Anlaufschicht is notwendig.
Journal ArticleDOI
The diffusion of 63Ni along grain boundaries in nickel oxide
A. Atkinson,R. I. Taylor +1 more
TL;DR: The product of the grain boundary diffusion coefficient and width, D′δ, has been measured directly for the diffusion of 63Ni along grain boundaries in high-purity NiO as discussed by the authors.
Journal ArticleDOI
The role of oxide microstructure and growth stresses in the high-temperature scaling of nickel
F. N. Rhines,J. S. Wolf +1 more
TL;DR: In this article, the formation of new nickel oxide upon boundaries of columnar grains where nickel diffusing through the oxide crystals, meets oxygen, diffusing along grain boundaries is identified as the primary cause of this stress.
Journal ArticleDOI
The diffusion of Ni in the bulk and along dislocations in NiO single crystals
A. Atkinson,R. I. Taylor +1 more
TL;DR: In this paper, diffusion profiles of 63Ni tracer in single crystals of NiO following anneals at 522°-1000°C have been determined by a radio-frequency sputter-sectioning technique.
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