On the oxidation behavior of titanium within coated nickel-based superalloys

R. J. Bennett; R. Krakow; A. S. Eggeman; C. N. Jones; H. Murakami; C. M.F. Rae

doi:10.1016/j.actamat.2015.03.052

On the oxidation behavior of titanium within coated nickel-based superalloys

R. J. Bennett^*, R. Krakow, A. S. Eggeman, C. N. Jones, H. Murakami, C. M.F. Rae

^*Corresponding author for this work

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

17 Citations (Scopus)

Abstract

Rutile precipitation within alumina scales grown on coated nickel-based superalloy CMSX-4 has been found to occur preferentially at grain boundaries within the scale. Misorientation analysis using Rodrigues-Frank space has revealed clustering of the misorientation between neighboring grains of corundum and rutile about the established 0 0 0 1_c{1 1 2¯ 0}_c//0 1 0_r{1 0 1}_r orientation relationship observed in Ti-containing sapphire crystals. The fraction of interfaces found to exist in this configuration is sufficient to explain the nucleation of rutile from a single corundum grain abutting the rutile grain. The diffusive behavior of Ti has been observed to vary considerably within three commercially used coatings, a plain aluminide coating, a plat-aluminide coating and a diffused platinum coating. Titanium diffusion is enhanced by the presence of Pt. However this did not lead to the precipitation of more rutile, which although observed in all three coatings, was present in sufficient quantity to be detected using XRD only within the plain aluminide coated samples.

Original language	English
Pages (from-to)	278-289
Number of pages	12
Journal	Acta Materialia
Volume	92
DOIs	https://doi.org/10.1016/j.actamat.2015.03.052
Publication status	Published - 2015 Jun 15
Externally published	Yes

Keywords

Coating
EBSD
Nickel-based superalloy
Oxidation
Thermal barrier coatings (TBC)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2015.03.052

Cite this

@article{4a732cddef144f15bbbff935d2d8c4cf,

title = "On the oxidation behavior of titanium within coated nickel-based superalloys",

abstract = "Rutile precipitation within alumina scales grown on coated nickel-based superalloy CMSX-4 has been found to occur preferentially at grain boundaries within the scale. Misorientation analysis using Rodrigues-Frank space has revealed clustering of the misorientation between neighboring grains of corundum and rutile about the established 0 0 0 1c{1 1 2¯ 0}c//0 1 0r{1 0 1}r orientation relationship observed in Ti-containing sapphire crystals. The fraction of interfaces found to exist in this configuration is sufficient to explain the nucleation of rutile from a single corundum grain abutting the rutile grain. The diffusive behavior of Ti has been observed to vary considerably within three commercially used coatings, a plain aluminide coating, a plat-aluminide coating and a diffused platinum coating. Titanium diffusion is enhanced by the presence of Pt. However this did not lead to the precipitation of more rutile, which although observed in all three coatings, was present in sufficient quantity to be detected using XRD only within the plain aluminide coated samples.",

keywords = "Coating, EBSD, Nickel-based superalloy, Oxidation, Thermal barrier coatings (TBC)",

author = "Bennett, {R. J.} and R. Krakow and Eggeman, {A. S.} and Jones, {C. N.} and H. Murakami and Rae, {C. M.F.}",

note = "Funding Information: The work was carried out under the financial support provided by Rolls-Royce plc and Engineering and Physical Sciences Research Councils, UK under the Rolls-Royce/ESPRC Strategic Partnership (EP/M005607/1 & EP/H022309/1). This study was also supported by Nanotechnology Platform Project (NIMS Nanofabrication Platform) sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. Financial support was also received from the Seventh Framework Programme of the European Commission: ESTEEM2, contract number 312483. Requests for access to the underlying research data should be directed to the corresponding author and will be considered against commercial interests and data protection.",

year = "2015",

month = jun,

day = "15",

doi = "10.1016/j.actamat.2015.03.052",

language = "English",

volume = "92",

pages = "278--289",

journal = "Acta Materialia",

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T1 - On the oxidation behavior of titanium within coated nickel-based superalloys

AU - Bennett, R. J.

AU - Krakow, R.

AU - Eggeman, A. S.

AU - Jones, C. N.

AU - Murakami, H.

AU - Rae, C. M.F.

N1 - Funding Information: The work was carried out under the financial support provided by Rolls-Royce plc and Engineering and Physical Sciences Research Councils, UK under the Rolls-Royce/ESPRC Strategic Partnership (EP/M005607/1 & EP/H022309/1). This study was also supported by Nanotechnology Platform Project (NIMS Nanofabrication Platform) sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. Financial support was also received from the Seventh Framework Programme of the European Commission: ESTEEM2, contract number 312483. Requests for access to the underlying research data should be directed to the corresponding author and will be considered against commercial interests and data protection.

PY - 2015/6/15

Y1 - 2015/6/15

N2 - Rutile precipitation within alumina scales grown on coated nickel-based superalloy CMSX-4 has been found to occur preferentially at grain boundaries within the scale. Misorientation analysis using Rodrigues-Frank space has revealed clustering of the misorientation between neighboring grains of corundum and rutile about the established 0 0 0 1c{1 1 2¯ 0}c//0 1 0r{1 0 1}r orientation relationship observed in Ti-containing sapphire crystals. The fraction of interfaces found to exist in this configuration is sufficient to explain the nucleation of rutile from a single corundum grain abutting the rutile grain. The diffusive behavior of Ti has been observed to vary considerably within three commercially used coatings, a plain aluminide coating, a plat-aluminide coating and a diffused platinum coating. Titanium diffusion is enhanced by the presence of Pt. However this did not lead to the precipitation of more rutile, which although observed in all three coatings, was present in sufficient quantity to be detected using XRD only within the plain aluminide coated samples.

AB - Rutile precipitation within alumina scales grown on coated nickel-based superalloy CMSX-4 has been found to occur preferentially at grain boundaries within the scale. Misorientation analysis using Rodrigues-Frank space has revealed clustering of the misorientation between neighboring grains of corundum and rutile about the established 0 0 0 1c{1 1 2¯ 0}c//0 1 0r{1 0 1}r orientation relationship observed in Ti-containing sapphire crystals. The fraction of interfaces found to exist in this configuration is sufficient to explain the nucleation of rutile from a single corundum grain abutting the rutile grain. The diffusive behavior of Ti has been observed to vary considerably within three commercially used coatings, a plain aluminide coating, a plat-aluminide coating and a diffused platinum coating. Titanium diffusion is enhanced by the presence of Pt. However this did not lead to the precipitation of more rutile, which although observed in all three coatings, was present in sufficient quantity to be detected using XRD only within the plain aluminide coated samples.

KW - Coating

KW - EBSD

KW - Nickel-based superalloy

KW - Oxidation

KW - Thermal barrier coatings (TBC)

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SP - 278

EP - 289

JO - Acta Materialia

JF - Acta Materialia

ER -

On the oxidation behavior of titanium within coated nickel-based superalloys

Abstract

Keywords

ASJC Scopus subject areas

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