Oxidation of β-Zr and related phases in Zr-Nb alloys:: an electron microscopy investigation

被引：35

作者：

Lin, YP

Woo, OT

机构：

[1] Ontario Power Technol, Toronto, ON M8Z 6C4, Canada

[2] Atom Energy Canada Ltd, Chalk River Nucl Labs, Chalk River, ON K0J 1J0, Canada

来源：

JOURNAL OF NUCLEAR MATERIALS | 2000年 / 277卷 / 01期

关键词：

D O I：

10.1016/S0022-3115(99)00153-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation of the metastable beta-Zr phase in Zr-Nb alloys, primarily Zr-2.5Nb, in 673 K steam or in lithiated water at 583 K, was investigated using electron microscopy and microanalyses. In the SEM, oxidised beta-Zr regions in the Zr-2.5Nb alloy were imaged via a field effect contrast mechanism. In the TEM, microanalyses consistently showed the presence of Nb associated with the oxidised beta-regions in suitably prepared samples. The beta-Zr was found to form a Nb2Zrx-2O2x+1 oxide, while the beta-Nb exhibited delayed oxidation with respect to alpha-Zr, forming a metallic sub-oxide initially and becoming amorphous when oxidised. For the partially decomposed beta-Zr, the omega-phase was found to form monoclinic ZrO2, while the Nb-enriched beta-Zr followed the behaviour of either beta-Zr or beta-Nb depending on the Nb concentration. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：11 / 27

页数：17

共 47 条

[1]

[Anonymous], 1984, ZIRCONIUM NUCL IND 6

[2]

BRADLEY ER, 1990, P IAEA TECHN COMM M, P1011

[3] OXIDE DER TIEFTEMPERATUROXYDATION VON NIOB UND TANTAL [J].

BRAUER, G ;

MULLER, H ;

KUHNER, G .

JOURNAL OF THE LESS-COMMON METALS, 1962, 4 (06) :533-546

[4] TRANSFORMATION AND AGE HARDENING BEHAVIOR OF ZR 19 WTPERCENT NB [J].

CHEADLE, BA ;

ALDRIDGE, SA .

JOURNAL OF NUCLEAR MATERIALS, 1973, 47 (02) :255-258

[5] EFFECT OF COMPOSITION AND HEAT-TREATMENT ON THE MICROSTRUCTURE AND CORROSION BEHAVIOR OF ZR-NB ALLOYS [J].

CHOO, KN ;

KANG, YH ;

PYUN, SI ;

URBANIC, VF .

JOURNAL OF NUCLEAR MATERIALS, 1994, 209 (03) :226-235

[6] THE STRUCTURE REFINEMENT OF COMPOSITELY MODULATED NB2ZRX-2O2X+1 (X=12) [J].

FUTTERER, K ;

SCHMID, S ;

THOMPSON, JG ;

WITHERS, RL ;

ISHIZAWA, N ;

KISHIMOTO, S .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1995, 51 :688-697

[7]

GARZAROLLI F, 1991, AM SOC TEST MATER, V1132, P395, DOI 10.1520/STP25519S

[8] Special grain boundaries in zirconia corrosion films [J].

Gertsman, VY ;

Lin, YP ;

Zhilyaev, AP ;

Szpunar, JA .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1999, 79 (07) :1567-1590

[9] A method for the quantitative phase analysis of ZrO2 films grown on Zr-2.5% Nb pressure tubes [J].

Glavicic, MG ;

Szpunar, JA ;

Lin, YP .

JOURNAL OF NUCLEAR MATERIALS, 1997, 245 (2-3) :147-151

[10]

GODLEWSKI J, 1991, AM SOC TEST MATER, V1132, P416, DOI 10.1520/STP25520S

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