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Phase transformations in nanocomposite ZrAlN thin films during annealing

Published online by Cambridge University Press:  30 May 2012

Lina Rogström ,
Mats Ahlgren ,
Jonathan Almer ,
Lars Hultman  and
Magnus Odén
Lina Rogström*
Affiliation:
Nanostructured Materials, Department of Physics, Chemistry, and Biology (IFM), Linköping University, S-581 83 Linköping, Sweden
Mats Ahlgren
Affiliation:
Sandvik Tooling AB, 126 80 Stockholm, Sweden
Jonathan Almer
Affiliation:
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439
Lars Hultman
Affiliation:
Thin Film Physics, Department of Physics, Chemistry, and Biology (IFM), Linköping University, S-581 83 Linköping, Sweden
Magnus Odén
Affiliation:
Nanostructured Materials, Department of Physics, Chemistry, and Biology (IFM), Linköping University, S-581 83 Linköping, Sweden
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Nanocomposite Zr0.52Al0.48N1.11 thin films consisting of crystalline grains surrounded by an amorphous matrix were deposited using cathodic arc evaporation. The structure evolution after annealing of the films was studied using high-energy x-ray scattering and transmission electron microscopy. The mechanical properties were characterized by nanoindentation on as-deposited and annealed films. After annealing in temperatures of 1050–1400 °C, nucleation and grain growth of cubic ZrN takes place in the film. This increases the hardness, which reaches a maximum, while parts of the film remain amorphous. Grain growth of the hexagonal AlN phase occurs above 1300 °C.

Keywords

x-ray diffraction (XRD)phase transformationphysical vapor deposition (PVD)
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 13 , 14 July 2012 , pp. 1716 - 1724
Copyright
Copyright © Materials Research Society 2012

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References

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