Oxidation of NiCr and NiCrMo Alloys at Low Temperatures-Reference-Cited by-同舟云学术

Oxidation of NiCr and NiCrMo Alloys at Low Temperatures

Published:2023-09-14 Issue:11 Volume:79 Page:1287-1296
ISSN:0010-9312
Container-title:Corrosion
language:en
Short-container-title:

Author:

Volders Cameron¹,Ramalingam Gopalakrishnan¹,Angelici Avincola Valentina¹,Waluyo Iradwikanari²,Hunt Adrian²,Reinke Petra¹^ORCID

Affiliation:

1. *Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904.

2. **National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973.

Abstract

Oxidation of Ni-Cr and Ni-Cr-Mo was studied in operando with near ambient pressure x-ray photoelectron spectroscopy in the Cabrera-Mott regime. The oxidation temperature was 200°C—a severely diffusion-limited regime. The near-surface alloy is Cr-enriched after the reduction of native oxide in vacuum, and especially so for Ni-15Cr-6Mo. Mo-cations are integrated into the oxide and Mo(VI) dominates at the surface. The surface chemistry-driven promotion of chromia by Mo predicted by theory is negated by the limited surface diffusion of reactants. Preoxidation processing is proposed to control the oxide properties for the use of Ni-Cr superalloys at low temperatures.

Publisher

Association for Materials Protection and Performance (AMPP)

Subject

General Materials Science,General Chemical Engineering,General Chemistry

Link

https://meridian.allenpress.com/corrosion/article-pdf/79/11/1287/3282201/4400.pdf

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