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Alumina–Aluminide Alloys (3A) Technology: II, Modeling of Ti x Al y –Al 2 O 3 Composites Formation
Author(s) -
Gaus Shaun P.,
Harmer Martin P.,
Chan Helen M.,
Caram Hugo S.,
Bruhn Jörn,
Claussen Nils
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01438.x
Subject(s) - aluminide , titanium aluminide , differential thermal analysis , thermogravimetry , materials science , sintering , intermetallic , diffraction , analytical chemistry (journal) , metallurgy , thermodynamics , composite material , chemistry , inorganic chemistry , physics , alloy , optics , chromatography
The reaction sintering of Ti x Al y –Al 2 O 3 composites from TiO 2 /Al starting powder mixtures has been characterized by thermogravimetry and differential thermal analysis (TG/DTA), in situ temperature measurements, and predictions via a continuum model. In order to model the TiO 2 /Al reaction system, it was necessary to first determine the postmill reactant concentrations and the dominant reaction. The postmill reactant concentrations were obtained from TG/DTA measurements in air, while X‐ray diffraction (XRD) was used to gain insight into the reaction mechanisms. A continuum model of the process was fitted to in situ temperature measurements by adjusting two parameters. The model was then used to investigate the effects of various processing conditions on the reaction behavior.