Influence of Cr Alloying (1.5 to 5 at.%) on Martensitic Phase Transformation Temperatures in Co-Ni-Ga-Cr Thin Films

  • Peer DeckerEmail author
  • Jill Fortmann
  • Steffen Salomon
  • Philipp Krooß
  • Thomas Niendorf
  • Alfred Ludwig


A Co-Ni-Ga-Cr thin film materials library with a Cr concentration gradient ranging from 1.5 at.% to 5 at.% was magnetron-sputtered to determine the influence of Cr additions on the martensite transformation temperature of non-stoichiometric Co2NiGa-based Heusler alloys. An increase of the phase transformation temperature from 30 °C for 5 at.% Cr up to 100 °C for 1.5 at.% Cr was determined by a peak fitting analysis of temperature-dependent X-ray diffraction data.


X-ray diffraction Thin films Combinatorial materials science Martensite phase transformation Sputtering CoNiGa 



Financial support is gratefully acknowledged by the Deutsche Forschungsgemeinschaft (DFG) within the Research Unit Program “Hochtemperatur-Formgedächtnislegierungen” (Project No. 200999873; Project Nos. LU1175/11-2; NI1327/3-2).


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Copyright information

© ASM International 2019

Authors and Affiliations

  • Peer Decker
    • 1
    Email author
  • Jill Fortmann
    • 1
  • Steffen Salomon
    • 1
  • Philipp Krooß
    • 2
  • Thomas Niendorf
    • 2
  • Alfred Ludwig
    • 1
  1. 1.Institute for MaterialsRuhr UniversityBochumGermany
  2. 2.Metallic Materials, Institute for Materials EngineeringUniversity of KasselKasselGermany

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