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Abstract

The oxidation of NiAI has been studied using scanning and transmission electron microscopy (SEM and TEM, respectively), and Auger electron spectroscopy (AES). It was observed that during the oxidation of several compositions of the intermetallic compound NiAI an intermediate layer of mixed oxide formed between the metal and the alumina scale. Interfacial voids (which are associated with spalling of the oxide) and vacancy dislocation loops were observed in all the alloys examined. Spalling can be delayed by abrading the metal surface prior to oxidation. The origin of the vacancies which give rise to these defects is discussed in terms of (a) vacancy injection, (b) unequal diffusion rates of Ni and Al in NiAI and (c) stress.

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References

DOBSON

P. S.

and SMALLMAN

R. E.

: Proc. R. Soc., 1966, A293, 423.

MICHELL

and OGILVIE

G. J.

.: Phys. Status Solidi, 1966, 15, 83.

SMALLMAN

R. E.

and Dossox

P. S.

: ‘Vacancies 76’, 193: 1977, London, Metals Society.

KUMAR

, NASRALLAH

, and DOUGLASS

D. L.

: Oxid. Met., 1974, 8, 227.

GOEBEL

J. A.

and PETTIT

F. S.

: Pratt and Whitney Report PWA-4772, East Hartford, Connecticut, 1973.

HARRIS

: Acta Metall., 1978, 26, 1033.

HOWES

v. R.

: Corrosion Sci., 1970, 10, 99.

COX

M. G. C.

, MCENANEY

, and SCOTT

V. C.

: Philos. Mag., 1973, 28, 309.

TIEN

J. K.

and PETTIT

F. S.

: Metall. Trans., 1972, 3, 1587.

10.

GIGGINS

C. S.

and PETTIT

F. S.

: ‘Oxide scale adherence mechanisms’ Contract F33615; 72—C-1702; 1975; Wright Patterson Air Force Base, Ohio, Aerospace Research Laboratories.

11.

SMIALEK

J. L.

: Metall. Trans., 1978, 9A, 309.

12.

FRASER

H. L.

, LORETTO

M. H.

, SMALLMAN

R. E.

, and WASILEWSKI

R. J.

: Philos. Mag., 1973, 28, 639.

13.

HUTCHINGS

and LORETTO

M. H.

: Met. Sci., 1978, 12, 503.

14.

HUTCHINGS

: PhD thesis, University of Birmingham, 1976.

15.

KUBASCHEWSKI

and HOPKINS

B. E.

: ‘Oxidation of metals and alloys’, 1965: New York, Plenum.

16.

PALMBERG

P. W.

, RIACH

G. E.

, WEBER

R. E.

, and MacDONALD

N. C.

: ‘Handbook of Auger electron spectroscopy’; 1972, Physical Electronics Industries, Edina.

17.

TREACY

J. C.

: ‘Electron emission spectroscopy’, (ed. Dekeyser ); 1973, Dordecht-Holland, Reidal Publishing Co.

18.

JENKINS

L. H.

and CHUNG

M. F.

: Surf Sci., 1971, 28, 409.

19.

EISNER

J. E.

, ENGELL

H. J.

, SCHULTZ

, JACOBI

, and SCHLATTE

: Philos. Mag., 1975, 31, 739.

20.

FRASER

H. L.

, LORETTO

M. H.

, SMALLMAN

R. E.

, and WASILEWSKI

R. J.

: ibid., 1975, 32, 873.

21.

MARSHALL

G. W.

and BRITTAIN

J. 0.

: Metall. Trans., 1976, 7A, 1013.

22.

SHANKAR

and SEIGLE

L. L.

: ibid., 1978, 9A, 1467.

23.

KUENZLY

J. D.

and DOUGLASS

D. L.

: Oxid. Met., 1974, 8, 139.

24.

GIBBS

G. B.

and HALES

: ‘Vacancies 76’, 201: 1977, London, Metals Society.

25.

TYLECOTE

R. F.

: J. Iron Steel Inst., 1960, 195, 380.

Oxidation of intermetallic compound NiAI

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References