Influence of Cr on the oxidation of Fe3Al and Ni3Al at 500°C

被引：16

作者：

Velon, A ^{[1
]}

Yi, DQ ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Engn Met, S-41296 Gothenburg, Sweden

来源：

OXIDATION OF METALS | 2002年 / 57卷 / 1-2期

关键词：

aluminides; Ni3Al; Fe3Al; dry air; Cr; high-temperature oxidation;

D O I：

10.1023/A:1013386427567

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of chromium on the mechanical properties of the aluminides Fe3Al and Ni3Al has been studied extensively. In order to evaluate the role of Cr during the early stages of oxidation, Fe3Al and Ni3Al containing 2 and 4 at.% Cr were oxidized in dry air at 500degreesC for 6, 50, and 100 hr. The oxide scale on Fe3Al consists of a layer of Fe2O3 mixed with FeAl2O4 on top of a continuous layer of (Al, Cr)(2)O-3. Ni3Al is covered with a mixed layer of (Al, Cr)(2)O-3 and NiO/NiAl2O4 underneath a layer of NiO/NiAl2O4. Moreover, Cr induces the nucleation and growth of Fe2O3 and NiO particles at the oxide surface of Fe3Al and Ni3Al, respectively. This is due to enhanced cationic diffusion through the Cr-modified oxides. As a conclusion, additions of Cr zip to 4 at.% are detrimental to the oxidation behavior of both aluminides at 500degreesC.

引用

页码：13 / 31

页数：19

共 50 条

[1] Influence of Cr on the Oxidation of Fe3Al and Ni3Al at 500°C
A. Velon
D.-Q. Yi
Oxidation of Metals, 2002, 57 : 13 - 31
[2] An overview of the welding of Ni3Al and Fe3Al alloys
Santella, ML
INTERNATIONAL SYMPOSIUM ON NICKEL AND IRON ALUMINIDES: PROCESSING, PROPERTIES, AND APPLICATIONS, 1997, : 321 - 327
[3] Oxidation Behavior of Ni3Al and Fe3Al: II. Early Stage of Oxide Growth
A. Velon
I. Olefjord
Oxidation of Metals, 2001, 56 : 425 - 452
[4] Oxidation behavior of Ni3Al and Fe3Al:: II.: Early stage of oxide growth
Velon, A
Olefjord, I
OXIDATION OF METALS, 2001, 56 (5-6): : 425 - 452
[5] Intermetallids Ni3Al and Fe3Al with directional structure as future materials
Verin, AS
Verin, MA
ANTI-CORROSION METHODS AND MATERIALS, 2001, 48 (05) : 298 - 303
[6] Mechanisms of Ni3Al oxidation between 500°C and 700°C
Haerig, M
Hofmann, S
APPLIED SURFACE SCIENCE, 1998, 125 (01) : 99 - 114
[7] Oxidation Behavior of Ni3Al and Fe3Al: I. XPS Calibrations of Pure Compounds and Quantification of the Results
A. Velon
I. Olefjord
Oxidation of Metals, 2001, 56 : 415 - 424
[8] Oxidation behavior of Ni3Al and Fe3Al:: I.: XPS calibrations of pure compounds and quantification of the results
Velon, A
Olefjord, I
OXIDATION OF METALS, 2001, 56 (5-6): : 415 - 424
[9] Metal dusting of Fe3Al and (Fe,Ni)(3)Al
Strauss, S
Krajak, R
Palm, M
Grabke, HJ
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 1996, 47 (12): : 701 - 702
[10] Oxidation of Ni3Al
Velon, A
Olefjord, I
ECASIA 97: 7TH EUROPEAN CONFERENCE ON APPLICATIONS OF SURFACE AND INTERFACE ANALYSIS, 1997, : 397 - 400

← 1 2 3 4 5 →