Calorimetric and phase diagram studies of the Co-Sn system

G. P. Vassilev; K. I. Lilova; J. C. Gachon

doi:10.1016/j.intermet.2007.02.006

Calorimetric and phase diagram studies of the Co-Sn system

G. P. Vassilev, K. I. Lilova, J. C. Gachon

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

50 Scopus citations

Abstract

Enthalpies of formation of cobalt-tin compounds (βCo₃Sn₂, CoSn, CoSn₂, βCoSn₃) have been obtained by direct reaction calorimetry at 1287, 1032, 629 and 604 K, respectively. Integral molar enthalpies of formation of the liquid phase (Δ_f H^L,T) have been measured by solution calorimetry at 991 and 1020 K, and by direct reaction calorimetry at 1010 and 1303 K. The experimental (Δ_f H^L,T) values in the tin-rich region have been approximated by regular solution model with temperature dependent parameters. The temperature and the enthalpy of the order/disorder transformation αCo₃Sn₂ → βCo₃Sn₂ were found to be 833 ± 2 K and 750 ± 30 J/mol, respectively. A metastable phase corresponding to the formula Co₂Sn has been observed. The occurrence of the polymorphic transition αCoSn₃/βCoSn₃ was confirmed although the corresponding transition temperature could not be observed sometimes.

Original language	English (US)
Pages (from-to)	1156-1162
Number of pages	7
Journal	Intermetallics
Volume	15
Issue number	9
DOIs	https://doi.org/10.1016/j.intermet.2007.02.006
State	Published - Sep 2007
Externally published	Yes

Keywords

A. Intermetallics, miscellaneous
B. Order/disorder transformations
B. Phase diagrams
B. Thermodynamic and thermochemical properties

ASJC Scopus subject areas

General Chemistry
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.intermet.2007.02.006

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title = "Calorimetric and phase diagram studies of the Co-Sn system",

abstract = "Enthalpies of formation of cobalt-tin compounds (βCo3Sn2, CoSn, CoSn2, βCoSn3) have been obtained by direct reaction calorimetry at 1287, 1032, 629 and 604 K, respectively. Integral molar enthalpies of formation of the liquid phase (Δf HL,T) have been measured by solution calorimetry at 991 and 1020 K, and by direct reaction calorimetry at 1010 and 1303 K. The experimental (Δf HL,T) values in the tin-rich region have been approximated by regular solution model with temperature dependent parameters. The temperature and the enthalpy of the order/disorder transformation αCo3Sn2 → βCo3Sn2 were found to be 833 ± 2 K and 750 ± 30 J/mol, respectively. A metastable phase corresponding to the formula Co2Sn has been observed. The occurrence of the polymorphic transition αCoSn3/βCoSn3 was confirmed although the corresponding transition temperature could not be observed sometimes.",

keywords = "A. Intermetallics, miscellaneous, B. Order/disorder transformations, B. Phase diagrams, B. Thermodynamic and thermochemical properties",

author = "Vassilev, {G. P.} and Lilova, {K. I.} and Gachon, {J. C.}",

year = "2007",

month = sep,

doi = "10.1016/j.intermet.2007.02.006",

language = "English (US)",

volume = "15",

pages = "1156--1162",

journal = "Intermetallics",

issn = "0966-9795",

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T1 - Calorimetric and phase diagram studies of the Co-Sn system

AU - Vassilev, G. P.

AU - Lilova, K. I.

AU - Gachon, J. C.

PY - 2007/9

Y1 - 2007/9

N2 - Enthalpies of formation of cobalt-tin compounds (βCo3Sn2, CoSn, CoSn2, βCoSn3) have been obtained by direct reaction calorimetry at 1287, 1032, 629 and 604 K, respectively. Integral molar enthalpies of formation of the liquid phase (Δf HL,T) have been measured by solution calorimetry at 991 and 1020 K, and by direct reaction calorimetry at 1010 and 1303 K. The experimental (Δf HL,T) values in the tin-rich region have been approximated by regular solution model with temperature dependent parameters. The temperature and the enthalpy of the order/disorder transformation αCo3Sn2 → βCo3Sn2 were found to be 833 ± 2 K and 750 ± 30 J/mol, respectively. A metastable phase corresponding to the formula Co2Sn has been observed. The occurrence of the polymorphic transition αCoSn3/βCoSn3 was confirmed although the corresponding transition temperature could not be observed sometimes.

AB - Enthalpies of formation of cobalt-tin compounds (βCo3Sn2, CoSn, CoSn2, βCoSn3) have been obtained by direct reaction calorimetry at 1287, 1032, 629 and 604 K, respectively. Integral molar enthalpies of formation of the liquid phase (Δf HL,T) have been measured by solution calorimetry at 991 and 1020 K, and by direct reaction calorimetry at 1010 and 1303 K. The experimental (Δf HL,T) values in the tin-rich region have been approximated by regular solution model with temperature dependent parameters. The temperature and the enthalpy of the order/disorder transformation αCo3Sn2 → βCo3Sn2 were found to be 833 ± 2 K and 750 ± 30 J/mol, respectively. A metastable phase corresponding to the formula Co2Sn has been observed. The occurrence of the polymorphic transition αCoSn3/βCoSn3 was confirmed although the corresponding transition temperature could not be observed sometimes.

KW - A. Intermetallics, miscellaneous

KW - B. Order/disorder transformations

KW - B. Phase diagrams

KW - B. Thermodynamic and thermochemical properties

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DO - 10.1016/j.intermet.2007.02.006

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SN - 0966-9795

VL - 15

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EP - 1162

JO - Intermetallics

JF - Intermetallics

IS - 9

ER -

Calorimetric and phase diagram studies of the Co-Sn system

Abstract

Keywords

ASJC Scopus subject areas

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