Predicting high temperature mechanical properties of CrN and CrAlN coatings from in-situ synchrotron radiation X-ray diffraction

Ehsan Mohammadpour, Zhong Tao Jiang, Mohmmednoor Altarawneh, Zonghan Xie, Zhi Feng Zhou, Nicholas Mondinos, Justin Kimpton, Bogdan Z. Dlugogorski

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

This contribution investigates the phase composition of CrN and CrAlN coatings by in-situ high temperature synchrotron radiation (SR-XRD), with the coatings deposited on steel substrate by closed field unbalance magnetron sputtering. Rietveld refinement on the SR-XRD spectra indicated CrN as the major phase, over the temperature range of 25 °C - 700 °C, for both coatings. At the high temperature of 700 °C, a Cr2N phase was observed in the CrN coating while the CrAlN coating also had a Cr phase. Williamson-Hall plots, from the refined data, afforded estimating variations of the strain and crystallite size of the major phase, up to 700 °C. The crystallite size (10 nm) for the CrAlN coating, at 25 °C, agrees very well with previous GI-XRD and TEM results obtained at room temperature Li et al. (2012).

Original languageEnglish
Pages (from-to)98-103
Number of pages6
JournalThin Solid Films
Volume599
DOIs
Publication statusPublished - Jan 29 2016
Externally publishedYes

Keywords

  • GSASII
  • Hard coatings
  • High temperature X-ray diffraction
  • Rietveld refinement
  • Strain
  • Synchrotron radiation
  • Williamson-Hall

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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