Enthalpies of formation of Mo-Ru and Mo-Ru-Si compounds determined by high-temperature direct reaction synthesis calorimetry

My Y. Benarchid; N. David; J. M. Fiorani; M. Vilasi

doi:10.1016/j.tca.2009.04.007

Enthalpies of formation of Mo-Ru and Mo-Ru-Si compounds determined by high-temperature direct reaction synthesis calorimetry

My Y. Benarchid, N. David, J. M. Fiorani, M. Vilasi

Centre national de la recherche scientifique

Research output: Contribution to journal › Article › peer-review

Abstract

The enthalpies of formation of (Ru) hcp solid solution and Mo₅Ru₃ (σ phase) in the Mo-Ru system and ternary extension in the Mo-Ru-Si system at Mo₅₆Ru₃₇Si₇ composition, have been determined by high-temperature direct reaction synthesis calorimetry at 1760 K. The following values are reported: Δ_fH^{1760 K}(Ru) = -10.6 ± 0.5 kJ/mol at.%; Δ_fH^{1760 K}(Mo₅Ru₃) = -7.4 ± 0.4 kJ/mol at.%; Δ_fH^{1760 K}(Mo₅₆Ru₃₇Si₇) = -13.1 ± 3.3 kJ/mol at.%. The results are compared with the previous values derived from e.m.f. measurements. They are also compared with the predicted values obtained by Calphad, by ab initio method combined to Calphad modelling, and derived from a thermodynamic database named "TM16.TDB".

Original language	English
Pages (from-to)	26-29
Number of pages	4
Journal	Thermochimica Acta
Volume	494
Issue number	1-2
DOIs	https://doi.org/10.1016/j.tca.2009.04.007
Publication status	Published - 10 Oct 2009

Keywords

Direct reaction calorimetry
High-temperature enthalpy of formation
Mo-Ru alloys
Mo-Ru-Si alloys
Thermodynamics

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10.1016/j.tca.2009.04.007

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@article{12b9017870a5475c8e6b74268fbb851f,

title = "Enthalpies of formation of Mo-Ru and Mo-Ru-Si compounds determined by high-temperature direct reaction synthesis calorimetry",

abstract = "The enthalpies of formation of (Ru) hcp solid solution and Mo5Ru3 (σ phase) in the Mo-Ru system and ternary extension in the Mo-Ru-Si system at Mo56Ru37Si7 composition, have been determined by high-temperature direct reaction synthesis calorimetry at 1760 K. The following values are reported: ΔfH1760 K(Ru) = -10.6 ± 0.5 kJ/mol at.\%; ΔfH1760 K(Mo5Ru3) = -7.4 ± 0.4 kJ/mol at.\%; ΔfH1760 K(Mo56Ru37Si7) = -13.1 ± 3.3 kJ/mol at.\%. The results are compared with the previous values derived from e.m.f. measurements. They are also compared with the predicted values obtained by Calphad, by ab initio method combined to Calphad modelling, and derived from a thermodynamic database named {"}TM16.TDB{"}.",

keywords = "Direct reaction calorimetry, High-temperature enthalpy of formation, Mo-Ru alloys, Mo-Ru-Si alloys, Thermodynamics",

author = "Benarchid, \{My Y.\} and N. David and Fiorani, \{J. M.\} and M. Vilasi",

year = "2009",

month = oct,

day = "10",

doi = "10.1016/j.tca.2009.04.007",

language = "English",

volume = "494",

pages = "26--29",

journal = "Thermochimica Acta",

issn = "0040-6031",

number = "1-2",

}

TY - JOUR

T1 - Enthalpies of formation of Mo-Ru and Mo-Ru-Si compounds determined by high-temperature direct reaction synthesis calorimetry

AU - Benarchid, My Y.

AU - David, N.

AU - Fiorani, J. M.

AU - Vilasi, M.

PY - 2009/10/10

Y1 - 2009/10/10

N2 - The enthalpies of formation of (Ru) hcp solid solution and Mo5Ru3 (σ phase) in the Mo-Ru system and ternary extension in the Mo-Ru-Si system at Mo56Ru37Si7 composition, have been determined by high-temperature direct reaction synthesis calorimetry at 1760 K. The following values are reported: ΔfH1760 K(Ru) = -10.6 ± 0.5 kJ/mol at.%; ΔfH1760 K(Mo5Ru3) = -7.4 ± 0.4 kJ/mol at.%; ΔfH1760 K(Mo56Ru37Si7) = -13.1 ± 3.3 kJ/mol at.%. The results are compared with the previous values derived from e.m.f. measurements. They are also compared with the predicted values obtained by Calphad, by ab initio method combined to Calphad modelling, and derived from a thermodynamic database named "TM16.TDB".

AB - The enthalpies of formation of (Ru) hcp solid solution and Mo5Ru3 (σ phase) in the Mo-Ru system and ternary extension in the Mo-Ru-Si system at Mo56Ru37Si7 composition, have been determined by high-temperature direct reaction synthesis calorimetry at 1760 K. The following values are reported: ΔfH1760 K(Ru) = -10.6 ± 0.5 kJ/mol at.%; ΔfH1760 K(Mo5Ru3) = -7.4 ± 0.4 kJ/mol at.%; ΔfH1760 K(Mo56Ru37Si7) = -13.1 ± 3.3 kJ/mol at.%. The results are compared with the previous values derived from e.m.f. measurements. They are also compared with the predicted values obtained by Calphad, by ab initio method combined to Calphad modelling, and derived from a thermodynamic database named "TM16.TDB".

KW - Direct reaction calorimetry

KW - High-temperature enthalpy of formation

KW - Mo-Ru alloys

KW - Mo-Ru-Si alloys

KW - Thermodynamics

U2 - 10.1016/j.tca.2009.04.007

DO - 10.1016/j.tca.2009.04.007

M3 - Article

AN - SCOPUS:70249138302

SN - 0040-6031

VL - 494

SP - 26

EP - 29

JO - Thermochimica Acta

JF - Thermochimica Acta

IS - 1-2

ER -

Enthalpies of formation of Mo-Ru and Mo-Ru-Si compounds determined by high-temperature direct reaction synthesis calorimetry

Abstract

Keywords

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