Promoting exclusive α-Al2O3 growth upon high-temperature oxidation of NiCrAl alloys:: experiment versus model predictions

被引：117

作者：

Nijdam, TJ ^{[1
]}

Jeurgens, LPH ^{[1
]}

Sloof, WG ^{[1
]}

机构：

[1] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 AL Delft, Netherlands

来源：

ACTA MATERIALIA | 2005年 / 53卷 / 06期

关键词：

oxidation; diffusion; thermodynamics; modelling; MCrAlY;

D O I：

10.1016/j.actamat.2004.12.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The relationships between the compositional changes in the alloy and the morphology and phase constitution of the developing oxide scale are established as a function of oxidation time for the thermal oxidation of a gamma-Ni-27Cr-9Al (at.%) alloy at 1373 K and a high and low partial oxygen pressure (pO(2)) of 2 x 10(4) and 0.1 Pa, respectively. Based on experimental observations, and model calculations using a coupled thermodynamic-kinetic oxidation model, four successive growth stages can be identified for the oxidation of a gamma-Ni-27Cr-9Al alloy at 1373 K. It is shown that the exclusive growth of alpha-Al2O3 is promoted for oxidation at low PO2 by maintaining a sufficiently high concentration of Al in the alloy at the oxide/metal interface during the initial stages of fast oxide-scale growth. (c) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1643 / 1653

页数：11

共 25 条

[1] SINGLE-CRYSTAL OF YAG - NEW FAST SCINTILLATOR IN SEM [J].

AUTRATA, R ;

SCHAUER, P ;

KVAPIL, J ;

KVAPIL, J .

JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1978, 11 (07) :707-708

[2] ALLOY DEPLETION PROFILES RESULTING FROM PREFERENTIAL REMOVAL OF LESS NOBLE-METAL DURING ALLOY OXIDATION [J].

BASTOW, BD ;

WHITTLE, DP ;

WOOD, GC .

OXIDATION OF METALS, 1978, 12 (05) :413-438

[3]

BIRKS N, 1963, J I MET, V91, P308

[4] OXIDATION OF NI-CR-AL ALLOYS BETWEEN 1000 DEGREES AND 1200 DEGREES C [J].

GIGGINS, CS ;

PETTIT, FS .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1971, 118 (11) :1782-&

[5] THE EFFECT OF ALLOY GRAIN-SIZE ON THE TRANSIENT OXIDATION BEHAVIOR OF AN ALUMINA-FORMING ALLOY [J].

GOEDJEN, JG ;

SHORES, DA .

OXIDATION OF METALS, 1992, 37 (3-4) :125-142

[6] INTERNAL OXIDATION OF TERNARY ALLOYS .1. KINETICS IN THE ABSENCE OF AN EXTERNAL SCALE [J].

GUAN, SW ;

YI, HC ;

SMELTZER, WW .

OXIDATION OF METALS, 1994, 41 (5-6) :377-387

[7]

Heinrich K.F.J., 1991, ELECT PROBE QUANTITA

[8] TRANSIENT OXIDATION OF A NI-15CR-6AL ALLOY [J].

KEAR, BH ;

PETTIT, FS ;

LEMAIRE, LP ;

FORNWALT, DE .

OXIDATION OF METALS, 1971, 3 (06) :557-&

[9]

Kofstad P., 1988, Elsevier Appl. Sci., V24, DOI [10.1002/crat.2170240408, DOI 10.1002/CRAT.2170240408]

[10] Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings [J].

Liu, ZY ;

Gao, W ;

Dahm, KL ;

Wang, FH .

ACTA MATERIALIA, 1998, 46 (05) :1691-1700

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