Calorimetric investigation of the mixing enthalpy of liquid Co-Cu-Ti alloys at 1873 K

The mixing enthalpies of liquid Co−Cu−Ti alloys were investigated at 1873 K using a high-temperature isoperibolic calorimeter. The experiments were performed along sections x Co /x Cu  = 3/1, 1/3 at x Ti  = 0 − 0.62 and along section x Co /x Cu  = 1/1 at x Ti  = 0 − 0.54. The limiting partial enthal...

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Bibliographic Details
Published in:Physics and chemistry of liquids 2018-09, Vol.56 (5), p.674-684
Main Authors: Dreval, Liya A, Agraval, Pavel G, Turchanin, Mikhail A
Format: Article
Language:English
Subjects:
Calorimetry
cobalt-copper-titanium system
Copper
Copper base alloys
Dry cleaners
Enthalpy
Integrals
Investigations
liquid alloys
mixing enthalpy
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Summary:The mixing enthalpies of liquid Co−Cu−Ti alloys were investigated at 1873 K using a high-temperature isoperibolic calorimeter. The experiments were performed along sections x Co /x Cu  = 3/1, 1/3 at x Ti  = 0 − 0.62 and along section x Co /x Cu  = 1/1 at x Ti  = 0 − 0.54. The limiting partial enthalpies of mixing of undercooled liquid titanium in liquid Co−Cu alloys, , are (-128 ± 21) kJ mol -1 (section x Co /x Cu  = 3/1), (-130 ± 12) kJ mol -1 (section x Co /x Cu  = 1/1) and (-107 ± 11) kJ mol -1 (section x Co /x Cu  = 1/3). The integral mixing enthalpies are predominantly negative in the investigated composition range. For the integral mixing enthalpy, an analytical expression was obtained by the least square fit of the experimental results using the Redlich-Kister-Muggianu polynomial.
ISSN:0031-9104
1029-0451
DOI:10.1080/00319104.2017.1376058