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Title: Study of high-temperature thermal stability of MAX phases in vacuum
Authors: Low, IM
Pang, WK
Kennedy, SJ
Smith, RI
Keywords: Ceramics
Pressure range micro pa
Phase stability
Titanium nitrides
Issue Date: 28-Jan-2010
Publisher: American Ceramic Society
Citation: Low, I. M., Pang, W. K., Kennedy, S. J., & Smith, R. I. (2010). Study of high-temperature thermal stability of MAX phases in vacuum. 34th International Conference and Exposition on Advanced Ceramics and Composites (ICACC’10), 24th – 29th January 2010. Daytona Beach, Florida, United States of America: Hilton Daytona Beach Resort & Ocean Center. In W. M. Kriven, & Y. Zhou, et. al. (Eds.), Strategic Materials and Computational Design: Ceramic Engineering and Science Proceedings, 31(10), pp. 171-180. Westerville, Ohio, United States of America: American Ceramic Society.
Abstract: The susceptibility of two MAX phases (Ti2AlN and Ti 4AlN3) to high-temperature thermal dissociation in a dynamic environment of high-vacuum has been investigated using in-situ neutron diffraction. In high vacuum, these phases decomposed above 1400°C through the sublimation of Ti and Al elements, forming a surface coating of TiN. The kinetics of isothermal phase decomposition was modelled using the Avrami equation and the Avrami exponent (n) of isothermal decomposition of Ti 2AlN and Ti4AlN3 was determined to be 0.62 and 0.18 respectively. The characteristics of thermal stability and phase transitions in Ti2AlN and Ti4AlN3 are compared and discussed.
Gov't Doc #: 3339
ISBN: 9780470921913
ISSN: 0196-6219
Appears in Collections:Conference Publications

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