Effect of water vapor on high-temperature oxidation of NiAl alloy

Dingding Zhu; Xinli Wang; Jun Zhao; Jian Lu; Yichun Zhou; Canying Cai; Jianyu Huang; Guangwen Zhou

doi:10.1016/j.corsci.2020.108963

Effect of water vapor on high-temperature oxidation of NiAl alloy

Dingding Zhu
, Xinli Wang
, Jun Zhao
, Jian Lu
, Yichun Zhou
, Canying Cai
, Jianyu Huang
, Guangwen Zhou

Mechanical Engineering

Binghamton University

XiangTan University
Yanshan University
City University of Hong Kong
City University of Hong Kong Shenzhen Research Institute

Research output: Contribution to journal › Article › peer-review

65 Scopus citations

Abstract

The high-temperature oxidation of NiAl is studied with dry oxygen and water vapor. The oxidation in H₂O results in a thicker Al₂O₃ oxide scale than that in O₂. The oxide scale formed initially is a single layer of γ-Al₂O₃ that subsequently transforms into a α-Al₂O₃/γ-Al₂O₃ bilayer structure, in which the inner α-Al₂O₃ layer formed in H₂O has a higher porosity than that in O₂. Further density functional theory calculations show that H protons derived from H₂O molecules penetrate into the oxide lattice and boost the formation of lattice vacancies in both α-Al₂O₃ and γ-Al₂O₃, thus enhancing the oxide scale growth.

Original language	English
Article number	108963
Journal	Corrosion Science
Volume	177
DOIs	https://doi.org/10.1016/j.corsci.2020.108963
State	Published - Dec 2020

Keywords

Density-functional theory (DFT)
HO
High-temperature oxidation
NiAl
O
Transmission electron microscopy (TEM)

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10.1016/j.corsci.2020.108963

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title = "Effect of water vapor on high-temperature oxidation of NiAl alloy",

abstract = "The high-temperature oxidation of NiAl is studied with dry oxygen and water vapor. The oxidation in H2O results in a thicker Al2O3 oxide scale than that in O2. The oxide scale formed initially is a single layer of γ-Al2O3 that subsequently transforms into a α-Al2O3/γ-Al2O3 bilayer structure, in which the inner α-Al2O3 layer formed in H2O has a higher porosity than that in O2. Further density functional theory calculations show that H protons derived from H2O molecules penetrate into the oxide lattice and boost the formation of lattice vacancies in both α-Al2O3 and γ-Al2O3, thus enhancing the oxide scale growth.",

keywords = "Density-functional theory (DFT), HO, High-temperature oxidation, NiAl, O, Transmission electron microscopy (TEM)",

author = "Dingding Zhu and Xinli Wang and Jun Zhao and Jian Lu and Yichun Zhou and Canying Cai and Jianyu Huang and Guangwen Zhou",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = dec,

doi = "10.1016/j.corsci.2020.108963",

language = "English",

volume = "177",

journal = "Corrosion Science",

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TY - JOUR

T1 - Effect of water vapor on high-temperature oxidation of NiAl alloy

AU - Zhu, Dingding

AU - Wang, Xinli

AU - Zhao, Jun

AU - Lu, Jian

AU - Zhou, Yichun

AU - Cai, Canying

AU - Huang, Jianyu

AU - Zhou, Guangwen

PY - 2020/12

Y1 - 2020/12

N2 - The high-temperature oxidation of NiAl is studied with dry oxygen and water vapor. The oxidation in H2O results in a thicker Al2O3 oxide scale than that in O2. The oxide scale formed initially is a single layer of γ-Al2O3 that subsequently transforms into a α-Al2O3/γ-Al2O3 bilayer structure, in which the inner α-Al2O3 layer formed in H2O has a higher porosity than that in O2. Further density functional theory calculations show that H protons derived from H2O molecules penetrate into the oxide lattice and boost the formation of lattice vacancies in both α-Al2O3 and γ-Al2O3, thus enhancing the oxide scale growth.

AB - The high-temperature oxidation of NiAl is studied with dry oxygen and water vapor. The oxidation in H2O results in a thicker Al2O3 oxide scale than that in O2. The oxide scale formed initially is a single layer of γ-Al2O3 that subsequently transforms into a α-Al2O3/γ-Al2O3 bilayer structure, in which the inner α-Al2O3 layer formed in H2O has a higher porosity than that in O2. Further density functional theory calculations show that H protons derived from H2O molecules penetrate into the oxide lattice and boost the formation of lattice vacancies in both α-Al2O3 and γ-Al2O3, thus enhancing the oxide scale growth.

KW - Density-functional theory (DFT)

KW - HO

KW - High-temperature oxidation

KW - NiAl

KW - O

KW - Transmission electron microscopy (TEM)

UR - https://www.scopus.com/pages/publications/85090204458

U2 - 10.1016/j.corsci.2020.108963

DO - 10.1016/j.corsci.2020.108963

M3 - Article

SN - 0010-938X

VL - 177

JO - Corrosion Science

JF - Corrosion Science

M1 - 108963

ER -

Effect of water vapor on high-temperature oxidation of NiAl alloy

Abstract

Keywords

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