THERMAL-CONDUCTIVITY AND SPECIFIC-HEAT OF BORON CARBIDES

Citation
Pa. Medwick et al., THERMAL-CONDUCTIVITY AND SPECIFIC-HEAT OF BORON CARBIDES, Journal of alloys and compounds, 203(1-2), 1994, pp. 67-75
Citations number
33
Categorie Soggetti
Chemistry Physical","Metallurgy & Mining","Material Science
ISSN journal
09258388
Volume
203
Issue
1-2
Year of publication
1994
Pages
67 - 75
Database
ISI
SICI code
0925-8388(1994)203:1-2<67:TASOBC>2.0.ZU;2-P
Abstract
We present measurements of the thermal conductivity (30<T<300 K) and s pecific heat (80<T<300 K) of polycrystalline boron carbides (B1-xCx) f or carbon concentrations spanning the single-phase field (0.1<x<0.2) a nd compare our results with studies in other temperature regimes. The thermal conductivity decreases continuously with decreasing x as it ev olves from crystalline behavior for carbon-rich specimens to a glass-l ike conductivity characteristic of amorphous solids. The specific heat of boron carbides is insensitive to the carbon concentration for T>60 K.