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 journalArticle

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
Issue numberJanuary
Early online date29 Dec 2015
DOIs
Publication statusPublished - 29 Jan 2016
Externally publishedYes

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