Gibbs free energy difference between the undercooled liquid and the β phase of a Ti-Cr alloy | Zendy

K. Ohsaka | Zendy; E. H. Trinh | Zendy; J. C. Holzer | Zendy; William L. Johnson | Zendy

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Gibbs free energy difference between the undercooled liquid and the β phase of a Ti-Cr alloy

Author(s) -

K. Ohsaka,

E. H. Trinh,

J. C. Holzer,

William L. Johnson

Publication year - 1992

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.106450

Subject(s) - gibbs free energy , alloy , thermodynamics , materials science , phase (matter) , vitrification , enthalpy of fusion , fusion , chemistry , metallurgy , physics , differential scanning calorimetry , linguistics , philosophy , organic chemistry , nuclear physics

The heat of fusion and the specific heats of the solid and liquid have been experimentally determined for a Ti60Cr40 alloy. The data is used to evaluate the Gibbs free energy difference, ΔG, between the liquid and the β phase as a function of temperature to verify a reported spontaneous vitrification (SV) of the β phase in Ti‐Cr alloys. The results show that SV of an undistorted β phase in the Ti60Cr40 alloy at 873 K is not feasible because ΔG is positive at the temperature. However, ΔG may become negative with additional excess free energy to the β phase in the form of defects.

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