Effects of a Steam Pre-treatment on the Formation and Transformation of Alumina Phases on Fe Aluminide Coatings

被引：12
作者：
Aguero, A. [1 ]
Hernandez, M. [1 ]
Santaballa, A. [1 ]
机构：
[1] INTA, Area Mat Met, Madrid 28850, Spain
来源：
OXIDATION OF METALS | 2013年 / 79卷 / 5-6期
关键词：
Alumina scale transformation; Fe aluminide coatings; High temperature oxidation; Steam pre-treatment; WATER-VAPOR; OXIDATION BEHAVIOR;
D O I：
10.1007/s11085-012-9351-1
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Several researchers have studied the transformation of metastable aluminas (gamma- and theta-) to alpha-Al2O3 but very little is known regarding alumina scales formed under water vapour and their transformation to alpha-Al2O3. Some results have indicated that water vapour increases the oxidation rate of alumina-scale forming coatings but others have found the opposite, that is, that under water vapour the oxidation rates decrease as either transition aluminas do not form or the transformation to alpha-Al2O3 is accelerated. In addition, it was found that chi-Al2O3 is the only oxide that forms at the initial stages of oxidation under 100 % steam on Fe-Al coatings at 650 A degrees C. Under these conditions, this oxide is very protective, and slowly transforms onto alpha-Al2O3. A preliminary study of the transformation of chi- to alpha-Al2O3 at 900 A degrees C under laboratory air was carried out. chi-Al2O3 was generated by a steam pre-treatment on slurry Fe aluminide coatings deposited on P92.
引用
收藏
页码：601 / 611
页数：11
相关论文
共 24 条
[1]   Comparison between field and laboratory steam oxidation testing on aluminide coatings on P92 [J].
Agueero, A. ;
Gonzalez, V. ;
Gutierrez, M. ;
Knoedler, R. ;
Muelas, R. ;
Straub, S. .
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 2011, 62 (06) :561-568
[2]   Microstructural Evolution of Slurry Fe Aluminide Coatings During High Temperature Steam Oxidation [J].
Agueero, A. ;
Spiradek, K. ;
Hoefinger, S. ;
Gutierrez, M. ;
Muelas, R. .
HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 7, PTS 1 AND 2, 2008, 595-598 :251-259
[3]  
Aguero A., COMMUNICATION
[4]  
Aguero A., 2002, MAT ADV POWER ENG 2, P1149
[5]  
Bhattacharya I. N., 2004, SCANDINAVIAN J METAL, V211-219, P211
[6]   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-&
[7]   INFLUENCE OF SURFACE-AREA AND ADDITIVES ON THE THERMAL-STABILITY OF TRANSITION ALUMINA CATALYST SUPPORTS .1. KINETIC DATA [J].
BURTIN, P ;
BRUNELLE, JP ;
PIJOLAT, M ;
SOUSTELLE, M .
APPLIED CATALYSIS, 1987, 34 (1-2) :225-238
[8]   Water-vapor-effect on the oxidation of Fe-21.5wt%Cr-5.6wt%Al at 1000 degrees C [J].
Buscail, H ;
Heinze, S ;
Dufour, P ;
Larpin, JP .
OXIDATION OF METALS, 1997, 47 (5-6) :445-464
[9]  
Chevalier S, 2010, OXID MET, V73, P43, DOI [10.1007/s11085-009-9168-8, 10.1007/s11085-009-9168-1]
[10]   Water vapor effect on high-temperature oxidation behavior of Fe3Al intermetallics [J].
Chevalier, Sebastian ;
Juzon, Pitor ;
Przybylski, Kazimierz ;
Larpin, Jean-Pierre .
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2009, 10 (04)
123