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@ARTICLE{Haas:858863,
      author       = {Haas, Sebastian and Mosbacher, Mike and Senkov, Oleg and
                      Feuerbacher, Michael and Freudenberger, Jens and Gezgin,
                      Senol and Völkl, Rainer and Glatzel, Uwe},
      title        = {{E}ntropy {D}etermination of {S}ingle-{P}hase {H}igh
                      {E}ntropy {A}lloys with {D}ifferent {C}rystal {S}tructures
                      over a {W}ide {T}emperature {R}ange},
      journal      = {Entropy},
      volume       = {20},
      number       = {9},
      issn         = {1099-4300},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2018-07699},
      pages        = {654 -},
      year         = {2018},
      abstract     = {We determined the entropy of high entropy alloys by
                      investigating single-crystalline nickel and five high
                      entropy alloys: two fcc-alloys, two bcc-alloys and one
                      hcp-alloy. Since the configurational entropy of these
                      single-phase alloys differs from alloys using a base
                      element, it is important to quantify the entropy. Using
                      differential scanning calorimetry, cp-measurements are
                      carried out from −170 °C to the materials’ solidus
                      temperatures TS. From these experiments, we determined the
                      thermal entropy and compared it to the configurational
                      entropy for each of the studied alloys. We applied the rule
                      of mixture to predict molar heat capacities of the alloys at
                      room temperature, which were in good agreement with the
                      Dulong-Petit law. The molar heat capacity of the studied
                      alloys was about three times the universal gas constant,
                      hence the thermal entropy was the major contribution to
                      total entropy. The configurational entropy, due to the
                      chemical composition and number of components, contributes
                      less on the absolute scale. Thermal entropy has
                      approximately equal values for all alloys tested by DSC,
                      while the crystal structure shows a small effect in their
                      order. Finally, the contributions of entropy and enthalpy to
                      the Gibbs free energy was calculated and examined and it was
                      found that the stabilization of the solid solution phase in
                      high entropy alloys was mostly caused by increased
                      configurational entropy.},
      cin          = {PGI-5},
      ddc          = {510},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000448333000032},
      doi          = {10.3390/e20090654},
      url          = {https://juser.fz-juelich.de/record/858863},
}