Oxidation of aluminides

被引：54

作者：

Grabke, HJ ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

来源：

HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 4, PTS 1 AND 2 | 1997年 / 251-2卷

关键词：

intermetallic compounds and alloys; oxidation; metastable aluminas; transformations; growth rates; aluminium depletion; cavity formation; intergranular and internal oxidation; scale morphologies; nitrogen-; water vapour-; surface finish-; and alloying element effects in TiAl oxidation;

D O I：

10.4028/www.scientific.net/MSF.251-254.149

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the recent years the oxidation of NiAl, FeAl and TiAl and alloys of these intermetallics have been investigated extensively. For NiAl and FeAl selective Al2O3 formation occurs but at lower temperatures metastable modifications are formed. The nucleation, morphologies, trans-formations and growth rates of these modifications and of alpha-Al2O3 are described and also the effects of alloying additions on their occurrence. Depending on temperature and stoichiometric com-position, marked Al-depletion and cavity formation are observed upon oxidation of NiAl and FeAl. Under certain conditions intergranular and internal oxidation of NiAl is reported. The mechanisms of these phenomena have been elucidated and described. During oxidation of TiAl generally mixed layers of Al2O3 and TiO2 are grown, due to the similar oxygen affinity of Ti and Al. Different forms of scale structure are observed for oxidation in oxygen. Various conditions are reported which effect the oxidation resistance. For example, the presence of nitrogen and water vapour deteriorate the resistance, and surface finish (grinding) and certain alloying elements (Nb) improve the resistance.

引用

页码：149 / 161

页数：13

共 39 条

[1] MECHANISM OF ISOTHERMAL OXIDATION OF THE INTERMETALLIC TIAL AND OF TIAL ALLOYS [J].

BECKER, S ;

RAHMEL, A ;

SCHORR, M ;

SCHUTZE, M .

OXIDATION OF METALS, 1992, 38 (5-6) :425-464

[2] ALUMINUM DEPLETION PROFILES IN OXIDIZED NIAL SINGLE-CRYSTALS [J].

BOBETH, M ;

BISCHOFF, E ;

SCHUMANN, E ;

ROCKSTROH, M ;

RUHLE, M .

CORROSION SCIENCE, 1995, 37 (04) :657-670

[3] THE OXIDATION OF NIAL .3. INTERNAL AND INTERGRANULAR OXIDATION [J].

BRUMM, MW ;

GRABKE, HJ ;

WAGEMANN, B .

CORROSION SCIENCE, 1994, 36 (01) :37-53

[4] OXIDATION BEHAVIOR OF NIAL .2. CAVITY FORMATION BENEATH THE OXIDE SCALE ON NIAL OF DIFFERENT STOICHIOMETRIES [J].

BRUMM, MW ;

GRABKE, HJ .

CORROSION SCIENCE, 1993, 34 (04) :547-&

[5] THE OXIDATION BEHAVIOR OF NIAL .1. PHASE-TRANSFORMATIONS IN THE ALUMINA SCALE DURING OXIDATION OF NIAL AND NIAL-CR ALLOYS [J].

BRUMM, MW ;

GRABKE, HJ .

CORROSION SCIENCE, 1992, 33 (11) :1677-&

[6]

CHOUDHURY NS, 1976, PROPERTIES HIGH TEMP, P668

[7] TEM STUDIES OF OXIDIZED NIAL AND NI3AL CROSS-SECTIONS [J].

DOYCHAK, J ;

RUHLE, M .

OXIDATION OF METALS, 1989, 31 (5-6) :431-452

[8] TRANSIENT OXIDATION OF SINGLE-CRYSTAL BETA-NIAL [J].

DOYCHAK, J ;

SMIALEK, JL ;

MITCHELL, TE .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1989, 20 (03) :499-518

[9] Thermodynamic activities in the alloys of the Ti-Al system [J].

Eckert, M ;

Bencze, L ;

Kath, D ;

Nickel, H ;

Hilpert, K .

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1996, 100 (04) :418-424

[10]

ECKERT M, UNPUB

← 1 2 3 4 →