The galvanostatic charge and discharge of a lithium anode/solid polymer separator/insertion cathode cell is modeled using concentrated solution theory. The model is general enough to include a wide range of polymeric separator materials, lithium salts, and composite insertion cathodes. Insertion of lithium into the active cathode material is simulated using superposition, thus greatly simplifying the numerical calculations. Variable physical properties are permitted in the model. The results of a simulation of the charge/discharge behavior of the system are presented. Criteria are established to assess the importance of diffusion in the solid matrix and transport in the electrolyte. Consideration is also given to various procedures for optimization of the utilization of active cathode material.

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Modeling of Galvanostatic Charge and Discharge of the Lithium/Polymer/Insertion Cell

(1954). Electronic structure of primary solid solutions in metals. Advances in Physics: Vol. 3, No. 12, pp. 446-507.

Electronic structure of primary solid solutions in metals

Magnesium alloys are advanced light structural and functional materials being increasingly used in the automotive, aerospace, electronic, and energy industries. However, their corrosion performance at the current stage of development is still not good enough for increasingly diverse practical applications. The Cooperative Research Centre for Cast Metals Manufacturing (CAST) in Australia is one of the most active research organizations in the world established to cope with the problems associated with the development and application of advanced light metals. Corrosion and prevention of magnesium and its alloys is an important part of CAST'S research program. This paper presents a brief summary of recent research achievements by CAST and relevant research work in this area in the world. This overview covers "anodic hydrogen evolution", estimation of corrosion rate, corrosion of aluminum- and non-aluminum-containing magnesium alloys, influences of composition and microstructure on corrosion, corrosion of a die-cast magnesium alloy, galvanic corrosion, coolant corrosion, and an aluminum-alloyed coating. The aim of this overview is to deepen the current understanding of corrosion and protection of magnesium and its alloys and to provide a base for future research work in this field.

Recent Progress in Corrosion and Protection of Magnesium Alloys

X-ray studies of deformed metals

Selective laser melting additive manufacturing of Inconel 718 superalloy parts: Densification, microstructure and properties

The interplay of diffusion processes in metallic and oxide phases during the oxidation of alloys is analyzed theoretically for specified ideal conditions.The oxidation rate of alloys containing a noble metal (Au or Pt) and an oxidizable metal (Ni, Cu, or Zn) is calculated as a function of the alloy composition. The oxidation rate of Ni‐Pt alloys at 850° and 1100°C is essentially determined by the diffusion of nickel to the alloy‐ interface if the mole fraction of nickel is less than 0.5. Observed oxidation rates are in accordance with values calculated from diffusion data.Alloys in which both constituents are oxidizable may form either a one‐phase or a two‐phase scale. A necessary but not sufficient condition for the formation of a scale consisting of only one oxide is stated. Results for Cu‐Ni and Cu‐Zn alloys are essentially in accordance with theoretical considerations.On the other hand, it is shown that two oxides may nucleate initially and continue to grow even under conditions under which exclusive formation of the oxide of the less noble metal is a possible process. This is illustrated by observations on Cu‐Al alloys.

Theoretical Analysis of the Diffusion Processes Determining the Oxidation Rate of Alloys

The current distribution at plane electrodes of finite breadth is calculated under the assumption of a linear polarization curve. The current distribution at triangular‐wave profile electrodes is calculated for zero polarization, and an approximate solution is given for high polarization. Results of the theoretical analysis are compared to experimental data reported by Mantzell. It is shown how measurements with the Haring cell can be used to predict current density distributions for other geometrical conditions.

Carl Wagner

Papers

Theoretical Analysis of the Diffusion Processes Determining the Oxidation Rate of Alloys

Theoretical Analysis of the Current Density Distribution in Electrolytic Cells

Stacking faults by low-temperature cold work in copper and alpha brass☆

The attack of solid alloys by liquid metals and salt melts

Thermodynamics of phase diagrams of binary systems involving compounds