Thermodynamic Calculation of Diffusion Paths Applied to the Oxidation of γ-TiAl
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Armin Kussmaul
Abstract
The thermal oxidation process of γ-TiAl is discussed regarding kinetic and thermodynamic aspects. A simple thermodynamic model allows the calculation of diffusion paths and leads to a better comprehension of the role of thermodynamic and kinetic factors in diffusion processes. The calculations allow a reproduction of the experimental results. Moreover, it is possible to predict results in regions not yet experimentally determined. The advantage of potential phase diagrams compared with concentration phase diagrams is discussed for diffusion processes using the Ti–Al–O system as example.
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© 1998 Carl Hanser Verlag, München
Artikel in diesem Heft
- Frontmatter
- Editorial
- Zur Werkstoffwoche ’98
- Aufsätze
- Cyclic Deformation, Holdtime Creep and Thermomechanical Fatigue of an ODS Superalloy
- Lattice Parameters of γ and γ' Phases in Superalloy SC16 in Unconstrained Condition
- Ostwald Ripening of the Matrix Phase Surrounding Dispersoids
- Properties of Vacancies in Copper Determined by Electrical Resistivity Techniques
- Reactions of Hydrogen and Oxygen with Copper Melts Measured with a Modified CHAPEL Technique
- Thermodynamic Calculation of Diffusion Paths Applied to the Oxidation of γ-TiAl
- Isothermal Sections of Phase Equilibria in the Al–AlCo–AlNi System
- Experimental Study and Thermodynamic Assessment of Phase Equilibria in the Mn-Sc System
- Thermodynamics of Liquid Al–Cu–Zr Alloys
- Interdiffusion Paths in the Diffusion Couple Ti–SiC
- Modellierung der einachsigen Zug- und Druck-Verformung kugelgestrahlter Zylinderproben aus vergütetem 42 CrMo 4 und der dabei auftretenden Makroeigenspannungsänderungen
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Hochschulnachricht
- Buchbesprechung
- Trends
- Veranstaltungen
Artikel in diesem Heft
- Frontmatter
- Editorial
- Zur Werkstoffwoche ’98
- Aufsätze
- Cyclic Deformation, Holdtime Creep and Thermomechanical Fatigue of an ODS Superalloy
- Lattice Parameters of γ and γ' Phases in Superalloy SC16 in Unconstrained Condition
- Ostwald Ripening of the Matrix Phase Surrounding Dispersoids
- Properties of Vacancies in Copper Determined by Electrical Resistivity Techniques
- Reactions of Hydrogen and Oxygen with Copper Melts Measured with a Modified CHAPEL Technique
- Thermodynamic Calculation of Diffusion Paths Applied to the Oxidation of γ-TiAl
- Isothermal Sections of Phase Equilibria in the Al–AlCo–AlNi System
- Experimental Study and Thermodynamic Assessment of Phase Equilibria in the Mn-Sc System
- Thermodynamics of Liquid Al–Cu–Zr Alloys
- Interdiffusion Paths in the Diffusion Couple Ti–SiC
- Modellierung der einachsigen Zug- und Druck-Verformung kugelgestrahlter Zylinderproben aus vergütetem 42 CrMo 4 und der dabei auftretenden Makroeigenspannungsänderungen
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Hochschulnachricht
- Buchbesprechung
- Trends
- Veranstaltungen
