The role of Cr and Si in affecting high-temperature oxidation behaviour of minor Dy doped NiAl alloys

Jian He; Yang Luan; Hongbo Guo; Hui Peng; Yanli Zhang; Tian Zhang; Shengkai Gong

doi:10.1016/j.corsci.2013.08.020

The role of Cr and Si in affecting high-temperature oxidation behaviour of minor Dy doped NiAl alloys

Jian He
, Yang Luan
, Hongbo Guo^*
, Hui Peng
, Yanli Zhang
, Tian Zhang
, Shengkai Gong

^*Corresponding author for this work

School of Materials Science and Engineering

Liaoning University of International Business and Economics
Beihang University

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

46 Scopus citations

Abstract

Isothermal and cyclic oxidation behaviour of Cr/Si co-doped NiAlDy alloys were investigated at 1200°C. The role of Cr and Si in oxidation of NiAlDy alloys was discussed by combining experimental results and first-principles calculations. Cr and Si would co-segregate at grain boundaries and promoted the transformation from θ-Al₂O₃ to α-Al₂O₃ at initial oxidation stage. The NiAlDyCr-3Si alloy yielded a mass gain of ~0.64mg/cm² after 100h isothermal oxidation and showed much improved cyclic oxidation resistance due to the pair affinity between Si and Cr which can alleviate the deleterious effect of interfacial Cr precipitation.

Original language	English
Pages (from-to)	322-333
Number of pages	12
Journal	Corrosion Science
Volume	77
DOIs	https://doi.org/10.1016/j.corsci.2013.08.020
State	Published - Dec 2013

Keywords

A. Intermetallics
A. Rare earth element
B. Thermal cycling
C. Interface
C. Oxidation
C. Segregation

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10.1016/j.corsci.2013.08.020

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title = "The role of Cr and Si in affecting high-temperature oxidation behaviour of minor Dy doped NiAl alloys",

abstract = "Isothermal and cyclic oxidation behaviour of Cr/Si co-doped NiAlDy alloys were investigated at 1200°C. The role of Cr and Si in oxidation of NiAlDy alloys was discussed by combining experimental results and first-principles calculations. Cr and Si would co-segregate at grain boundaries and promoted the transformation from θ-Al2O3 to α-Al2O3 at initial oxidation stage. The NiAlDyCr-3Si alloy yielded a mass gain of \textasciitilde{}0.64mg/cm2 after 100h isothermal oxidation and showed much improved cyclic oxidation resistance due to the pair affinity between Si and Cr which can alleviate the deleterious effect of interfacial Cr precipitation.",

keywords = "A. Intermetallics, A. Rare earth element, B. Thermal cycling, C. Interface, C. Oxidation, C. Segregation",

author = "Jian He and Yang Luan and Hongbo Guo and Hui Peng and Yanli Zhang and Tian Zhang and Shengkai Gong",

year = "2013",

month = dec,

doi = "10.1016/j.corsci.2013.08.020",

language = "英语",

volume = "77",

pages = "322--333",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - The role of Cr and Si in affecting high-temperature oxidation behaviour of minor Dy doped NiAl alloys

AU - He, Jian

AU - Luan, Yang

AU - Guo, Hongbo

AU - Peng, Hui

AU - Zhang, Yanli

AU - Zhang, Tian

AU - Gong, Shengkai

PY - 2013/12

Y1 - 2013/12

N2 - Isothermal and cyclic oxidation behaviour of Cr/Si co-doped NiAlDy alloys were investigated at 1200°C. The role of Cr and Si in oxidation of NiAlDy alloys was discussed by combining experimental results and first-principles calculations. Cr and Si would co-segregate at grain boundaries and promoted the transformation from θ-Al2O3 to α-Al2O3 at initial oxidation stage. The NiAlDyCr-3Si alloy yielded a mass gain of ~0.64mg/cm2 after 100h isothermal oxidation and showed much improved cyclic oxidation resistance due to the pair affinity between Si and Cr which can alleviate the deleterious effect of interfacial Cr precipitation.

AB - Isothermal and cyclic oxidation behaviour of Cr/Si co-doped NiAlDy alloys were investigated at 1200°C. The role of Cr and Si in oxidation of NiAlDy alloys was discussed by combining experimental results and first-principles calculations. Cr and Si would co-segregate at grain boundaries and promoted the transformation from θ-Al2O3 to α-Al2O3 at initial oxidation stage. The NiAlDyCr-3Si alloy yielded a mass gain of ~0.64mg/cm2 after 100h isothermal oxidation and showed much improved cyclic oxidation resistance due to the pair affinity between Si and Cr which can alleviate the deleterious effect of interfacial Cr precipitation.

KW - A. Intermetallics

KW - A. Rare earth element

KW - B. Thermal cycling

KW - C. Interface

KW - C. Oxidation

KW - C. Segregation

UR - https://www.scopus.com/pages/publications/84885183953

U2 - 10.1016/j.corsci.2013.08.020

DO - 10.1016/j.corsci.2013.08.020

M3 - 文章

AN - SCOPUS:84885183953

SN - 0010-938X

VL - 77

SP - 322

EP - 333

JO - Corrosion Science

JF - Corrosion Science

ER -

The role of Cr and Si in affecting high-temperature oxidation behaviour of minor Dy doped NiAl alloys

Abstract

Keywords

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