Microstructure and mechanical properties of Ir-Ta coatings on nickel-base single-crystal superalloy TMS-75

P. Kuppusami; H. Murakami; T. Ohmura

doi:10.1116/1.1763913

Microstructure and mechanical properties of Ir-Ta coatings on nickel-base single-crystal superalloy TMS-75

P. Kuppusami^*, H. Murakami, T. Ohmura

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The iridium-alloy coatings with varying contents of tantalum, prepared by dc magnetron sputtering from a composite target, were investigated. It was observed that pure coatings of iridium and tantalum form polycrystalline films with rms roughness of ∼5 nm. The Ir-Ta coatings formed a nanocrystalline structure whose crystallite size and rms roughness decrease with increase in tantalum content. It was shown that the Young's modulus and hardness of the coatings generally decrease with increase in the tantalum content.

Original language	English
Pages (from-to)	1208-1217
Number of pages	10
Journal	Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume	22
Issue number	4
DOIs	https://doi.org/10.1116/1.1763913
Publication status	Published - 2004 Jul
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films

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AU - Ohmura, T.

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AB - The iridium-alloy coatings with varying contents of tantalum, prepared by dc magnetron sputtering from a composite target, were investigated. It was observed that pure coatings of iridium and tantalum form polycrystalline films with rms roughness of ∼5 nm. The Ir-Ta coatings formed a nanocrystalline structure whose crystallite size and rms roughness decrease with increase in tantalum content. It was shown that the Young's modulus and hardness of the coatings generally decrease with increase in the tantalum content.

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Microstructure and mechanical properties of Ir-Ta coatings on nickel-base single-crystal superalloy TMS-75

Abstract

ASJC Scopus subject areas

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