Assessment of a High-Throughput Methodology for the Study of Alloy Oxidation using AlxFeyNi1–x–y Composition Gradient Thin Films

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• 作者：Matthew A. Payne ; James B. Miller ; Martin E. Oliveros ; Geronimo Perez ; Cristol P. Gouvea ; Bráulio S. Archanjo ; Carlos A. Achete ; Andrew J. Gellman
• 刊名：ACS Combinatorial Science
• 出版年：2016
• 出版时间：July 11, 2016
• 年：2016
• 卷：18
• 期：7
• 页码：425-436
• 全文大小：618K
• 年卷期：0
• ISSN：2156-8944

文摘

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 Al_xFe_yNi_1–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 Al_xFe_yNi_1–x–y composition and the differences between the oxidation behavior of ∼100 nm thick CSAFs and that of bulk Al_xFe_yNi_1–x–y alloys. This was done by focusing specifically on Al_xFe_1–x and Al_xNi_1–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 Al_xFe_1–x CSAFs is found to be very similar to that of bulk Al_xFe_1–x alloys, but some minor differences between CSAF and bulk behavior are observed for Al_xNi_1–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.