Reply to comment on “Microstructural evolution during high-temperature oxidation of Ti2AlC ceramics”

The oxidation behavior and microstructural evolution of the nanostructure of Fe-Cr-Al oxide dispersion strengthened (ODS) alloys prepared by spark plasma sintering were investigated by high-temperature oxidation experiments in air at 1200 °C for 100 h. The formation of Al2O3 scale was observed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS) line scans. The oxidation rate of Fe-Cr-Al ODS alloys is lower than that of conventional Fe-Cr-Al alloys, and the oxide layer formed on the Fe-Cr-Al alloy appeared loose and cracked, whereas the oxide layer formed on the Fe-Cr-Al ODS alloys was adherent and flat. This is due to the high density of dispersed nano-oxides hindering the diffusion of Al element and the formation of vacancies caused by them. In addition, the nano-oxides could also adhere to the oxide layer. Besides, the microstructure of the Fe-Cr-Al ODS alloy had excellent stability during high-temperature oxidation.

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Microstructural evolution during high-temperature oxidation of spark plasma sintered Ti2AlN ceramics

Acta Materialia ◽

10.1016/j.actamat.2011.11.010 ◽

2012 ◽

Vol 60 (3) ◽

pp. 1079-1092 ◽

Cited By ~ 37

Author(s):

Bai Cui ◽

Rafael Sa ◽

Daniel D. Jayaseelan ◽

Fawad Inam ◽

Michael J. Reece ◽

...

Keyword(s):

High Temperature ◽

Microstructural Evolution ◽

High Temperature Oxidation ◽

Temperature Oxidation ◽

Spark Plasma

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High Temperature Oxidation and Microstructural Evolution of Modified MCrAlY Coatings

Metallurgical and Materials Transactions A ◽

10.1007/s11661-013-2086-z ◽

2013 ◽

Vol 45 (3) ◽

pp. 1401-1408 ◽

Cited By ~ 17

Author(s):

Giovanni Pulci ◽

Jacopo Tirillò ◽

Francesco Marra ◽

Fabrizio Sarasini ◽

Alessandra Bellucci ◽

...

Keyword(s):

High Temperature ◽

Microstructural Evolution ◽

High Temperature Oxidation ◽

Temperature Oxidation ◽

Mcraly Coatings

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Modeling of microstructural evolution and lifetime prediction of MCrAlY coatings on nickel based superalloys during high temperature oxidation

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2013.05.008 ◽

2013 ◽

Vol 232 ◽

pp. 204-215 ◽

Cited By ~ 50

Author(s):

Kang Yuan ◽

Robert Eriksson ◽

Ru Lin Peng ◽

Xin-Hai Li ◽

Sten Johansson ◽

...

Keyword(s):

High Temperature ◽

Microstructural Evolution ◽

High Temperature Oxidation ◽

Lifetime Prediction ◽

Temperature Oxidation ◽

Mcraly Coatings

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Microstructural Evolution during High-Temperature Oxidation of Ti2AlN Ceramics

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.65.106 ◽

2010 ◽

Vol 65 ◽

pp. 106-111

Author(s):

Bai Cui ◽

Rafael Sa ◽

Daniel Doni Jayaseelan ◽

Fawad Inam ◽

Michael J. Reece ◽

...

Keyword(s):

High Temperature ◽

Microstructural Evolution ◽

High Temperature Oxidation ◽

Oxidation Mechanism ◽

X Ray Diffraction ◽

Temperature Oxidation ◽

X Ray ◽

Oxidation In Air ◽

Α Al2o3 ◽

Increasing Temperature

Microstructural evolution of Ti2AlN ceramics during high-temperature oxidation in air has been revealed by X-ray diffraction (XRD), field emission gun scanning electron microscopy (FEGSEM), and energy-dispersive spectroscopy (EDS). After oxidation below 1200 °C, layered microstructures formed on Ti2AlN surfaces containing anatase, rutile, and α-Al2O3. Above 1200 °C, more complex layered microstructures formed containing Al2TiO5, rutile, α-Al2O3, and continuous void layers. With increasing temperature, anatase gradually transformed to rutile, and TiO2 reacted with α-Al2O3 to form Al2TiO5. Based on these microstructural observations, an oxidation mechanism for Ti2AlN ceramics is proposed.

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