Phase Equilibria in the Quaternary System Ti-Al-C-N |
| |
Authors: | Markus A. Pietzka,Julius C. Schuster |
| |
Affiliation: | Institut für Physikalische Chemie, Universität Wien, Vienna, Austria |
| |
Abstract: | The quaternary system Ti-Al-C-N and its binary and ternary boundary systems are investigated using powder methods and XRD analysis. Phase equilibria at 1375°C are presented in an isothermal network for alloys up to 50 at.% Ti. In the vertical section Ti2AIC1-x-Ti2AlN1-x a complete series of solid solutions exists at 1495°C, but a wide miscibility gap occurs at 1375°C. The vertical section Ti3AlC1-x-Ti3AlN1-x is more complex because of the occurrence of the quaternary, tetragonally distorted phase Ti3Al(C,N)1-x ( a = 0.41135(4) nm, c = 0.41366(5) nm) and the transformation of perovskite-type Ti3AlN1-x into filled Re3B-type Ti3AlN1-x below 1200°C. |
| |
Keywords: | |
|
|