title: Assessment of a High-Throughput Methodology for the Study of Alloy Oxidation using AlxFeyNi1-x-y Composition Gradient Thin Films.
abstract: The high-temperature oxidation of multicomponent metal alloys exhibits complex dependencies on composition, which are not fully understood for many systems. Combinatorial screening of the oxidation of many different compositions of a given alloy offers an ideal means for gaining fundamental insights into such systems. We have previously developed a high-throughput methodology for studying AlxFeyNi1-x-y alloy oxidation using ∼100 nm thick composition spread alloy films (CSAFs). In this work, we critically assess two aspects of this methodology: the sensitivity of CSAF oxidation behavior to variations in AlxFeyNi1-x-y composition and the differences between the oxidation behavior of ∼100 nm thick CSAFs and that of bulk AlxFeyNi1-x-y alloys. This was done by focusing specifically on AlxFe1-x and AlxNi1-x oxidation in dry air at 427 °C. Transitions between phenomenologically distinguishable types of oxidation behavior are found to occur over CSAF compositional ranges of <2 at. %. The oxidation of AlxFe1-x CSAFs is found to be very similar to that of bulk AlxFe1-x alloys, but some minor differences between CSAF and bulk behavior are observed for AlxNi1-x oxidation. On the basis of our assessment, high-throughput studies of CSAF oxidation appear to be an effective method for gaining fundamental insights into the composition dependence of the oxidation of bulk alloys.
authors.affiliation: DOE - National Energy Technology Laboratory , P.O. Box 10940, Pittsburgh, Pennsylvania 15236, United States.
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Payne
authors.affiliation: DOE - National Energy Technology Laboratory , P.O. Box 10940, Pittsburgh, Pennsylvania 15236, United States.
authors.forename: James B
authors.initials: JB
authors.lastname: Miller
authors.affiliation: Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia , Av. Nossa Senhora das Graças 50, 25250-020 Duque de Caxias, Rio de Janeiro, Brasil.
authors.forename: Martin E
authors.initials: ME
authors.lastname: Oliveros
authors.affiliation: Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia , Av. Nossa Senhora das Graças 50, 25250-020 Duque de Caxias, Rio de Janeiro, Brasil.
authors.forename: Geronimo
authors.initials: G
authors.lastname: Perez
authors.affiliation: Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia , Av. Nossa Senhora das Graças 50, 25250-020 Duque de Caxias, Rio de Janeiro, Brasil.
authors.forename: Cristol P
authors.initials: CP
authors.lastname: Gouvea
authors.affiliation: Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia , Av. Nossa Senhora das Graças 50, 25250-020 Duque de Caxias, Rio de Janeiro, Brasil.
authors.forename: Bráulio S
authors.initials: BS
authors.lastname: Archanjo
authors.affiliation: Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia , Av. Nossa Senhora das Graças 50, 25250-020 Duque de Caxias, Rio de Janeiro, Brasil.
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Achete
authors.affiliation: DOE - National Energy Technology Laboratory , P.O. Box 10940, Pittsburgh, Pennsylvania 15236, United States.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Gellman
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002384:Catalysis; D020650:Combinatorial Chemistry Techniques / Q000379:methods; D057166:High-Throughput Screening Assays / Q000379:methods*; D006358:Hot Temperature; D009532:Nickel; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy
chemical_list: D000497:Alloys; D009532:Nickel
keywords: Al2O3 passivation; Al−Fe−Ni; high-throughput screening; materials libraries; oxidation; thin films