Enthalpies of formation of hafnium carbides

Enthalpies of formation of hafnium carbides

Enthalpies of combustion of hafnium oxycarbides HfC x O y (10 samples; 0.592 ⩽ x ⩽ 0.982; 0.006 ⩽ y ⩽ 0.149) have been determined by oxygen-bomb calorimetry. The dependence of enthalpies of formation of HfC x O y on x and y is described by the equation ΔH f o ( HfC x O y) kcal th mol −1 = 15.4 − 81....

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Veröffentlicht in:The Journal of chemical thermodynamics 1977-01, Vol.9 (7), p.629-642
Hauptverfasser: Kornilov, A.N., Chelovskaya, N.V., Zhelankin, V.I., Shveikin, G.P.
Format: Artikel
Sprache:eng
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Zusammenfassung:Enthalpies of combustion of hafnium oxycarbides HfC x O y (10 samples; 0.592 ⩽ x ⩽ 0.982; 0.006 ⩽ y ⩽ 0.149) have been determined by oxygen-bomb calorimetry. The dependence of enthalpies of formation of HfC x O y on x and y is described by the equation ΔH f o ( HfC x O y) kcal th mol −1 = 15.4 − 81.8x 1 − 100y , in which x 1 = x at x ⩽ 0.80 and x 1 = 0.80 at x ⩾ 0.80. The results are discussed.
ISSN:0021-9614
DOI:10.1016/0021-9614(77)90088-X