Nanoporosity improves the damage tolerance of nanostructured tantalum nitride coatings

Authors/Creators

Song Xu
Jiang Xu
Paul Monroe
Zonghan Xie, Edith Cowan UniversityFollow

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.

RAS ID

23830

Document Type

Journal Article

Date of Publication

2017

School

School of Engineering

Copyright

subscription content

Publisher

Elsevier

Comments

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. https://doi.org/10.1016/j.scriptamat.2017.02.008