The ZrC-C eutectic structure and melting behaviour: a high-temperature radiance spectroscopy study
A fast spectrograph has been employed for radiance measurements of zirconium carbide
samples laser - heated to very high temperature, for compositions 0.7 £ C / Zr £ 1.86 and in a spectral
range 0.550 μm £ l £ 0.900 μm. The ZrC-C eutectic temperature (recently established at 3155 ± 1 K)
has been taken as the radiance reference. The measured normal spectral emissivity (NSE) el of solid
zirconium carbide is close to 0.6 at 650 nm, in agreement with previous literature. Its hightemperature
behaviour, value in the liquid, carbon-content and wavelength dependences in the visiblenear
infrared range have been determined here for the first time. Liquid zirconium carbide seems to
interact with electromagnetic radiation in a more metallic way than the solid. A considerable NSE
increase has been observed at increasing carbon content, which can be interpreted on the basis of
preferential growth along the "c" plane of the carbon lamellae in the eutectic structure.
MANARA Dario;
JACKSON Heather;
PERINETTI-CASONI Carlo;
BOBORIDIS Konstantinos;
WELLAND Mike;
LUZZI L.;
OSSI P.M.;
LEE W.E.;
2013-04-12
ELSEVIER SCI LTD
JRC73144
0955-2219,
http://www.sciencedirect.com/science/article/pii/S0955221912006991,
https://publications.jrc.ec.europa.eu/repository/handle/JRC73144,
10.1016/j.jeurceramsoc.2012.12.008,
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