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Start Over Author "Mills K. C." Topic enthalpy
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2. Measurement and estimation of thermophysical properties of nickel based superalloys.

Author

Quested, P. N., Brooks, R. F., Chapman, L., Morrell, R., Youssef, Y., and Mills, K. C.

Subjects
THERMOPHYSICAL properties, NICKEL, HEAT resistant alloys, THERMAL diffusivity, ENTHALPY, THERMODYNAMICS
Abstract

Thermophysical properties for the solid and liquid phases of several Ni based superalloys (CMSX-4, CMSX-10, CM186LC, IN 738 and Rene 80) have been measured. The following properties were measured: heat capacity and enthalpy, thermal expansion coefficient and density, thermal diffusivity, viscosity and surface tension. Analysis of these measurements showed that that γ' phase (Ni3Al) affected the values for the following properties; Cp, enthalpy, electrical resistivity, thermal diffusivity and conductivity. Relationships have been identified between properties and the γ' phase content (which can be represented by mass% Al in the alloy). These relations were then used to calculate property values of the alloys from chemical composition. Other relations were developed to estimate the viscosities and surface tensions of Ni based superalloys. The predicted property values were found to be in good agreement with the measured values. [ABSTRACT FROM AUTHOR]

Published
2009
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3. Estimating the physical properties of slags

Author

Mills, K. C., Lang Yuan, and Jones, R. T.

Subjects
heat capacity, density, electrical conductivity, enthalpy, surface tension, viscosity, pyrometallurgy, thermal conductivity, molten, physical properties, slag
Abstract

SYNOPSIS The objective of this work was to provide process engineers with values of the physical properties of various slag systems involved in high-temperature processes. Software that calculates the thermophysical properties of slags from chemical composition is available on the www.pyrometallurgy.co.za website. This paper outlines the principles underlying the various models available in the program. The software calculates the following properties of crystalline, glassy, and liquid slags (where appropriate) as a function of temperature: heat capacity, enthalpy, density, viscosity, thermal conductivity, electrical conductivity, and surface tension. We hope, in the future, to update the program to (i) add new models as they become available, (ii) remove any 'bugs' discovered in existing programs, and (iii) provide guidance on the limitations of individual programs.

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