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@ARTICLE{Ahmad:329023,
      author       = {Ahmad, Azkar S. and Su, Y. and Liu, S. Y. and Ståhl, K.
                      and Wu, Y. D. and Hui, X. D. and Ruett, Uta and Gutowski, O.
                      and Glazyrin, K. and Liermann, H. P. and Franz, H. and Wang,
                      H. and Wang, X. D. and Cao, Q. P. and Zhang, D. X. and
                      Jiang, J. Z.},
      title        = {{S}tructural stability of high entropy alloys under
                      pressure and temperature},
      journal      = {Journal of applied physics},
      volume       = {121},
      number       = {23},
      issn         = {1089-7550},
      address      = {Melville, NY},
      publisher    = {American Inst. of Physics},
      reportid     = {PUBDB-2017-05670},
      pages        = {235901},
      year         = {2017},
      abstract     = {The stability of high-entropy alloys (HEAs) is a key issue
                      before their selection for industrial appli-cations. In this
                      study,in-situhigh-pressure and high-temperature synchrotron
                      radiation X-raydiffraction experiments have been performed
                      on three typical HEAs
                      Ni$_{20}$Co$_{20}$Fe$_{20}$Mn$_{20}$Cr$_{20}$,Hf$_{25}$Nb$_{25}$Zr$_{25}$Ti$_{25}$,
                      and Re$_{25}$Ru$_{25}$Co$_{25}$Fe$_{25}$(at. \%), having
                      face-centered cubic (fcc), body-centeredcubic (bcc), and
                      hexagonal close-packed (hcp) crystal structures,
                      respectively, up to the pressure of80 GPa and temperature
                      of1262 K. Under the extreme conditions of the pressure and
                      tempera-ture, all three studied HEAs remain stable up to the
                      maximum pressure and temperatures achieved.For these three
                      types of studied HEAs, the pressure-dependence of the volume
                      can be welldescribed with the third order Birch-Murnaghan
                      equation of state. The bulk modulus and itspressure
                      derivative are found to be 88.3 GPa and 4 for
                      bcc-Hf$_{25}$Nb$_{25}$Zr$_{25}$Ti$_{25}$, 193.9 GPa and5.9
                      for fcc-Ni$_{20}$Co$_{20}$Fe$_{20}$Mn$_{20}$Cr$_{20}$, and
                      304.6 GPa and 3.8 for hcp-Re25Ru25Co25Fe25HEAs,respectively.
                      The thermal expansion coefficient for the three studied HEAs
                      is found to be in theorder as follows:
                      fcc-Ni$_{20}$Co$_{20}$Fe$_{20}$Mn$_{20}$Cr$_{20}$ >
                      bcc-Hf$_{25}$Nb$_{25}$Zr$_{25}$Ti$_{25}$hcp-Re$_{25}$Ru$_{25}$Co$_{25}$Fe$_{25}$.},
      cin          = {DOOR / FS-PE / FSR},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-PE-20120731 /
                      I:(DE-H253)FSR-20120731},
      pnm          = {6211 - Extreme States of Matter: From Cold Ions to Hot
                      Plasmas (POF3-621) / 6G3 - PETRA III (POF3-622)},
      pid          = {G:(DE-HGF)POF3-6211 / G:(DE-HGF)POF3-6G3},
      experiment   = {EXP:(DE-H253)P-P02.2-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000404047400035},
      doi          = {10.1063/1.4984796},
      url          = {https://bib-pubdb1.desy.de/record/329023},
}