Phase diagram investigations of the Ni-Sn-Bi system

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

doi:10.1016/j.jallcom.2008.01.100

Phase diagram investigations of the Ni-Sn-Bi system

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

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

21 Scopus citations

Abstract

Phase equilibria were studied in the system Ni-Sn-Bi at 733 and 903 K. For this purpose, 30 ternary samples were synthesized using intimately mixed powders. After annealing in quartz ampoules and quenching, all alloys were analysed by scanning electron microscope. Differential thermal analyses (DTA) were done with specimens having chemical compositions near to the expected ternary Bi-Sn eutectic point. Isothermal sections of ternary system at 733 and 903 K were constructed. The phase equilibria between the liquid and the solid phases ((Ni), NiBi, Ni₃Sn₂ and Ni₃Sn₄) appeared to be inclined towards the Bi-corner at all temperatures. A formerly unknown ternary compound with approximate formula Ni₇Sn₂Bi and chemical composition (in mole fractions) X_Ni = 0.66 ± 0.03, X_Sn = 0.21 ± 0.02 and X_Bi = 0.13 ± 0.02 was observed by scanning electron microscopy but it could not be identified by X-ray diffraction analyses.

Original language	English (US)
Pages (from-to)	264-269
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	469
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2008.01.100
State	Published - Feb 5 2009
Externally published	Yes

Keywords

Metals and alloys
Phase diagrams
Powder metallurgy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2008.01.100

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title = "Phase diagram investigations of the Ni-Sn-Bi system",

abstract = "Phase equilibria were studied in the system Ni-Sn-Bi at 733 and 903 K. For this purpose, 30 ternary samples were synthesized using intimately mixed powders. After annealing in quartz ampoules and quenching, all alloys were analysed by scanning electron microscope. Differential thermal analyses (DTA) were done with specimens having chemical compositions near to the expected ternary Bi-Sn eutectic point. Isothermal sections of ternary system at 733 and 903 K were constructed. The phase equilibria between the liquid and the solid phases ((Ni), NiBi, Ni3Sn2 and Ni3Sn4) appeared to be inclined towards the Bi-corner at all temperatures. A formerly unknown ternary compound with approximate formula Ni7Sn2Bi and chemical composition (in mole fractions) XNi = 0.66 ± 0.03, XSn = 0.21 ± 0.02 and XBi = 0.13 ± 0.02 was observed by scanning electron microscopy but it could not be identified by X-ray diffraction analyses.",

keywords = "Metals and alloys, Phase diagrams, Powder metallurgy",

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

year = "2009",

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doi = "10.1016/j.jallcom.2008.01.100",

language = "English (US)",

volume = "469",

pages = "264--269",

journal = "Journal of Alloys and Compounds",

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T1 - Phase diagram investigations of the Ni-Sn-Bi system

AU - Vassilev, G. P.

AU - Lilova, K. I.

AU - Gachon, J. C.

PY - 2009/2/5

Y1 - 2009/2/5

N2 - Phase equilibria were studied in the system Ni-Sn-Bi at 733 and 903 K. For this purpose, 30 ternary samples were synthesized using intimately mixed powders. After annealing in quartz ampoules and quenching, all alloys were analysed by scanning electron microscope. Differential thermal analyses (DTA) were done with specimens having chemical compositions near to the expected ternary Bi-Sn eutectic point. Isothermal sections of ternary system at 733 and 903 K were constructed. The phase equilibria between the liquid and the solid phases ((Ni), NiBi, Ni3Sn2 and Ni3Sn4) appeared to be inclined towards the Bi-corner at all temperatures. A formerly unknown ternary compound with approximate formula Ni7Sn2Bi and chemical composition (in mole fractions) XNi = 0.66 ± 0.03, XSn = 0.21 ± 0.02 and XBi = 0.13 ± 0.02 was observed by scanning electron microscopy but it could not be identified by X-ray diffraction analyses.

AB - Phase equilibria were studied in the system Ni-Sn-Bi at 733 and 903 K. For this purpose, 30 ternary samples were synthesized using intimately mixed powders. After annealing in quartz ampoules and quenching, all alloys were analysed by scanning electron microscope. Differential thermal analyses (DTA) were done with specimens having chemical compositions near to the expected ternary Bi-Sn eutectic point. Isothermal sections of ternary system at 733 and 903 K were constructed. The phase equilibria between the liquid and the solid phases ((Ni), NiBi, Ni3Sn2 and Ni3Sn4) appeared to be inclined towards the Bi-corner at all temperatures. A formerly unknown ternary compound with approximate formula Ni7Sn2Bi and chemical composition (in mole fractions) XNi = 0.66 ± 0.03, XSn = 0.21 ± 0.02 and XBi = 0.13 ± 0.02 was observed by scanning electron microscopy but it could not be identified by X-ray diffraction analyses.

KW - Metals and alloys

KW - Phase diagrams

KW - Powder metallurgy

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Phase diagram investigations of the Ni-Sn-Bi system

Abstract

Keywords

ASJC Scopus subject areas

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