First-principles calculations, experimental study, and thermodynamic modeling of the Al-Co-Cr system.

Autor: Xuan L Liu, Thomas Gheno, Bonnie B Lindahl, Greta Lindwall, Brian Gleeson, Zi-Kui Liu

Publikováno v: PLoS ONE, Vol 10, Iss 4, p e0121386 (2015)

The phase relations and thermodynamic properties of the condensed Al-Co-Cr ternary alloy system are investigated using first-principles calculations based on density functional theory (DFT) and phase-equilibria experiments that led to X-ray diffracti

Externí odkaz: https://doaj.org/article/1c27cd17640d45da96d1fbc86f24a70d

Alumina Failure and Post-failure Oxidation in the NiCoCrAlY Alloy System at High Temperature

Autor: Thomas Gheno, Damien Texier, Maxime Ecochard, C. Rio

Publikováno v: Oxidation of Metals
Oxidation of Metals, Springer Verlag, 2021, 96 (5-6), pp.487-517. ⟨10.1007/s11085-021-10060-9⟩
Oxidation of Metals, 2021, 96 (5-6), pp.487-517. ⟨10.1007/s11085-021-10060-9⟩

This paper examines the oxidation behavior of thin specimens of cast NiCoCrAlY alloys at 1150 $$^\circ {\rm C}$$ through successive stages, from $${\rm Al}_2{\rm O}_3$$ growth to complete alloy conversion to oxide. Five alloy compositions were used,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a659ee37735d115fa67e34b49531312
https://hal.archives-ouvertes.fr/hal-03288006

Size effects on high temperature oxidation of MCrAlY coatings processed via APS and HVOF depositions

Autor: Ali Kalush, Damien Texier, Maxime Ecochard, Quentin Sirvin, Karim Choquet, Thomas Gheno, Nicolas Vanderesse, Walid Jomaa, Philippe Bocher

Publikováno v: Surface and Coatings Technology
Surface and Coatings Technology, 2022, 440, pp.128483. ⟨10.1016/j.surfcoat.2022.128483⟩

International audience; The paper demonstrates how defects inherited from the deposition processes can severely impair the lifetime of MCrAlY coatings in service. The oxidation behavior of two NiCoCrAlY coatings was investigated at 1150 °C up to 500

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0595beeba423aaf65cea6e0471898928
https://doi.org/10.1016/j.surfcoat.2022.128483

A first-principles based description of the Hf-Ni system supported by high-temperature synchrotron experiments

Autor: Matthew J. Kramer, Thomas Gheno, Xuan L. Liu, Zi Kui Liu, Pravat Kumar Ray, Shun Li Shang, Greta Lindwall, Bi Cheng Zhou, Brian Gleeson, Austin Ross

Publikováno v: Thermochimica Acta. 668:142-151

Hf-Ni is an important binary system for high temperature alloys and shape memory alloys which has been investigated several times in the literature but often using samples of Hf contaminated by Zr. The thermodynamics of this system are remodeled in t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::55800d47c5a181c06d1b3289f6e89696
https://doi.org/10.1016/j.tca.2018.08.011

A Thermodynamic Approach to Guide Reactive Element Doping: Hf Additions to NiCrAl

Autor: Bi Cheng Zhou, Brian Gleeson, Greta Lindwall, Austin Ross, Zi Kui Liu, Xuan Liu, Thomas Gheno

Publikováno v: Oxidation of Metals. 87:297-310

A method based on thermodynamic modeling was developed to determine optimal amounts of Hf additions to Al2O3-forming, γ-γ′ NiCrAl alloys. The alloy ability to maintain Hf in solution was set by the Hf concentration required to form HfO2 at the ox

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cc4662d51fbcc178d094a693242a2e9b
https://doi.org/10.1007/s11085-016-9706-0