Mechanical properties of Cr-alloyed MoSi₂-based nanocomposite coatings with a hierarchical structure

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2013

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Xu, J.
Wu, J.
Li, Z.
Munroe, P.
Xie, Z.

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Journal of Alloys and Compounds, 2013; 565:127-133

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Jiang Xu, Jia di Wu, Zhengyang Li, Paul Munroe, Zong-Han Xie

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Abstract

Novel Cr-alloyed MoSi<inf>2</inf>-based nanocomposite coatings were successfully synthesized onto Ti-6Al-4V substrates by a double glow discharge plasma technique. The architecture of the nanocomposite coatings exhibited a hierarchical structure, consisting of equiaxed C40-MoSi<inf>2</inf> with a bimodal grain size distribution and strip-shaped Mo<inf>5</inf>Si<inf>3</inf> grains segregated to the boundaries of submicron MoSi<inf>2</inf> grains. The results showed that the toughness of the MoSi<inf>2</inf>-based nanocomposite coatings depended strongly upon their hierarchical structure and the magnitude of compressive residual stresses in the nanocomposite coatings. © 2013 Elsevier B.V. All rights reserved.

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© 2013 Elsevier B.V. All rights reserved.

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