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High‐Temperature Thermal Expansion and Stability of V 2 AlC Up To 950°C
Author(s) -
Kulkarni Shrinivas R.,
Merlini Marco,
Phatak Nishad,
Saxena Surendra K.,
Artioli Gilberto,
Gupta Surojit,
Barsoum Michel W.
Publication year - 2007
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.1551-2916.2007.01847.x
Subject(s) - thermal expansion , atmospheric temperature range , thermal stability , materials science , anisotropy , argon , thermodynamics , synchrotron radiation , thermal , analytical chemistry (journal) , quartz , thermal decomposition , mineralogy , chemistry , composite material , optics , physics , organic chemistry , chromatography
Herein, we report on the thermal expansion and stability of V 2 AlC in the 25°–950°C temperature range. The sample was heated in an Argon atmosphere in a quartz capillary and the thermal expansion was measured using a X‐ray synchrotron radiation source. Up to the maximum temperature explored, there were no signs of decomposition or phase transitions. The temperature variation of volumetric thermal expansion is given by α v =2.53(5) × 10 −5 +5.75(3) × 10 −9 T °C −1 . At ≈9.40 × 10 −6 °C −1 , the thermal expansions along both the a and c lattice directions are quite comparable; in other words, there is little thermal expansion anisotropy in V 2 AlC.