Title

Nanoporosity improves the damage tolerance of nanostructured tantalum nitride coatings

Document Type

Journal Article

Publisher

Elsevier

School

School of Engineering

RAS ID

23830

Comments

Originally published as: Xu, S., Xu, J., Munroe, P., & Xie, Z. H. (2017). Nanoporosity improves the damage tolerance of nanostructured tantalum nitride coatings. Scripta Materialia, 133, 86-91. Original article available here

Abstract

Conventionally, nanostructured ceramics are susceptible to brittle fracture due to processing-induced flaws such as porosity. In this study, the microstructure and deformation behavior of two nanostructured Ta2N coatings, one with a fully-dense structure and the other with a nanoporous structure, both prepared by double cathode glow discharge technique, were investigated. It was found that the elastic modulus of the Ta2N coatings is more sensitive to the presence of nanoporosity than their hardnesses. Compared with the fully-dense Ta2N coating, the nanoporous Ta2N coating exhibits a marked increase in the damage tolerance, as well as a good potential for wear-resistance.

DOI

10.1016/j.scriptamat.2017.02.008

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