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

P. Kuppusami, Hideyuki Murakami, T. Ohmura

Research output: Contribution to journalArticle

12 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 languageEnglish
Pages (from-to)1208-1217
Number of pages10
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume22
Issue number4
DOIs
Publication statusPublished - 2004 Jul 1
Externally publishedYes

Fingerprint

Tantalum
heat resistant alloys
tantalum
Nickel
Superalloys
Single crystals
nickel
mechanical properties
coatings
Coatings
Mechanical properties
microstructure
Microstructure
single crystals
iridium alloys
Iridium alloys
roughness
Surface roughness
Iridium
nanostructure (characteristics)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

@article{2f109f2db4cc4c18997328d217bfd5d6,
title = "Microstructure and mechanical properties of Ir-Ta coatings on nickel-base single-crystal superalloy TMS-75",
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.",
author = "P. Kuppusami and Hideyuki Murakami and T. Ohmura",
year = "2004",
month = "7",
day = "1",
doi = "10.1116/1.1763913",
language = "English",
volume = "22",
pages = "1208--1217",
journal = "Journal of Vacuum Science and Technology A",
issn = "0734-2101",
publisher = "AVS Science and Technology Society",
number = "4",

}

TY - JOUR

T1 - Microstructure and mechanical properties of Ir-Ta coatings on nickel-base single-crystal superalloy TMS-75

AU - Kuppusami, P.

AU - Murakami, Hideyuki

AU - Ohmura, T.

PY - 2004/7/1

Y1 - 2004/7/1

N2 - 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.

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.

UR - http://www.scopus.com/inward/record.url?scp=4344612137&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4344612137&partnerID=8YFLogxK

U2 - 10.1116/1.1763913

DO - 10.1116/1.1763913

M3 - Article

VL - 22

SP - 1208

EP - 1217

JO - Journal of Vacuum Science and Technology A

JF - Journal of Vacuum Science and Technology A

SN - 0734-2101

IS - 4

ER -