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Atomic origins of water-vapour-promoted alloy oxidation

Journal Article · · Nature Materials

The presence of water vapor, intentional or unavoidable, is crucial to many materials applications, such as steam generator, turbine engine, fuel cell, catalyst, and corrosion 1-6. Phenomenologically, water vapor has been noticed to accelerate oxidation of metals/alloys 7,8, however, the atomistic mechanisms remain elusive. Herein, through direct in situ atomic-scale transmission electron microscopy observation and density functional theory calculation, we reveal that water vapor enhanced oxidation of Ni-Cr alloy is associated with proton dissolution promoted vacancy formation, migration and clustering. Protons derived from water dissociation occupy interstitial position in the oxide lattice, which consequently leads to the lowering of both vacancy formation energy and the cation diffusion barrier. The atomic scale observations reveal a water vapor derived proton mediated oxide growth mechanism, which provides insights for reckoning many technological processes concerning materials in moist environment at elevated temperatures.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1455285
Report Number(s):
PNNL-SA-124752; 49618; KP1704020
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 6 Vol. 17; ISSN 1476-1122
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

References (28)

Growth and adherence of chromia based surface scales on Ni-base alloys in high- and low-pO2 gases journal March 2008
The interaction of water with solid surfaces: fundamental aspects revisited journal May 2002
Surface-Step-Induced Oscillatory Oxide Growth journal September 2014
In situ atomic scale visualization of surface kinetics driven dynamics of oxide growth on a Ni–Cr surface journal January 2016
Materials for fuel-cell technologies journal November 2001
Enhanced internal oxidation as trigger for breakaway oxidation of Fe–Cr alloys in gases containing water vapor journal November 2007
Atomic-Resolution Environmental Transmission Electron Microscopy for Probing Gas–Solid Reactions in Heterogeneous Catalysis journal December 2007
Effect of water vapour on growth and adherence of chromia scales formed on Cr in high and low pO2-environments at 1000 and 1050°C journal August 2005
Characterization of Chromia Scales Grown on Pure Chromium in Different Oxidizing Atmospheres journal May 2000
Reactivity of the Gold/Water Interface During Selective Oxidation Catalysis journal September 2010
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Step-Edge-Induced Oxide Growth During the Oxidation of Cu Surfaces journal December 2012
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Visualizing the Cu/Cu 2 O Interface Transition in Nanoparticles with Environmental Scanning Transmission Electron Microscopy journal December 2016
The oxidation behaviour of metals and alloys at high temperatures in atmospheres containing water vapour: A review journal July 2008
Visualisation of single atom dynamics and their role in nanocatalysts under controlled reaction environments journal January 2014
Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study journal January 1998
Ab initiomolecular dynamics for liquid metals journal January 1993
Protonic defects in oxides and their possible role in high temperature oxidation journal December 1993
SimulaTEM: Multislice simulations for general objects journal January 2010
Direction-specific van der Waals attraction between rutile TiO 2 nanocrystals journal April 2017
Atomic origins of the high catalytic activity of nanoporous gold journal August 2012
Visualisation of single atom dynamics in water gas shift reaction for hydrogen generation journal January 2016
Charge and Ion Transport in NiO and Aspects of Ni Oxidation from First Principles journal January 2012
Corrosion aspects of Ni–Cr–Fe based and Ni–Cu based steam generator tube materials journal September 2009
Hot corrosion in gas turbine components journal February 2002
Visualizing Gas Molecules Interacting with Supported Nanoparticulate Catalysts at Reaction Conditions journal January 2012
International Workshop on High-Temperature Corrosion journal June 1996

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