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Ultrarapid Microwave Synthesis of Superconducting Refractory Carbides
Author(s) -
Vallance Simon R.,
Round David M.,
Ritter Clemens,
Cussen Edmund. J.,
Kingman Sam,
Gregory Duncan H.
Publication year - 2009
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200900968
Subject(s) - carbide , materials science , superconductivity , microwave , refractory (planetary science) , carbon fibers , nanotechnology , condensed matter physics , metallurgy , computer science , composite material , physics , telecommunications , composite number
Nb 1− x Ta x C Carbides can be synthesized by high power MW methods in less than 30 s. In situ and ex situ techniques probing changes in temperature and dielectric properties with time demonstrate that the reactions self‐terminate as the loss tangent of the materials decreases. The resulting carbides are carbon deficient and superconducting; T c correlates linearly to unit cell volume, reaching a maximum at NbC.