TRANSPORT IN ALPHA-AL2O3 SCALES ON FE-AL AND NI-AL ALLOYS AT 1100-DEGREES-C

被引：22

作者：

PRESCOTT, R ^{[1
]}

MITCHELL, DF ^{[1
]}

SPROULE, GI ^{[1
]}

GRAHAM, MJ ^{[1
]}

机构：

[1] NATL RES COUNCIL CANADA, INST MICROSTRUCT SCI, OTTAWA K1A 0R9, ONTARIO, CANADA

来源：

SOLID STATE IONICS | 1992年 / 53卷

关键词：

D O I：

10.1016/0167-2738(92)90386-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The nature of transport processes occurring during the growth of oxides at 1100-degrees-C on Fe-25 wt% Al and Ni-32 wt% Al has been investigated, Both materials develop protective alpha-Al2O3 scales which have been characterized by SEM, RHEED and Auger electron spectroscopy. Two-stage oxidation experiments have been conducted using O-16(2) and O-18(2) gases: imaging SIMS (secondary ion mass spectrometry) has been used to locate the different isotopic species. The SIMS data (profiles from areas as small as 3.5 mum X 3.5 mum, and images with 0. 1 mum lateral resolution) illustrate the complexity of the growth processes, and indicate areas where scale growth has taken place predominantly by cation or oxygen ion diffusion.

引用

页码：229 / 237

页数：9

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