Invar Like Behavior of the Cr2AlC MAX Phase at Low Temperature. Issue 12 (13th November 2013)

• Record Type: Journal Article
• Authors: Jaouen, Michel; Chartier, Patrick; Cabioc'h, Thierry; Mauchamp, Vincent; André, Gilles; Viret, Michel; Zhou, Y.
• Is Part Of: Journal of the American Ceramic Society. Volume 96:Issue 12(2013)
• Page Start: 3872
• Page End: 3876
• Publication Date: 2013-11-13
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12635
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12635-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The structure of Cr₂AlC has been studied using neutron scattering experiments performed in a temperature range running from room temperature down to 1.8 K. It is shown that the unit cell volume does not vary significantly below 80 K. This anomalous behavior, correlated with the existence of a weak ferromagnetic ordering revealed from superconducting quantum interference device experiments, is similar to that characteristic of Invar alloys. Just above the Curie temperature <italic>T</italic>_C ~ 73 ± 5 K, the Cr₂AlC undergoes significant distortions of the octahedron and triangular prisms units. Above 100 K, Cr₂AlC follows an usual thermal expansion.</p> </abstract>