Grain boundary transport through thermally grown alumina scales on NiAl

被引：8

作者：

Barth, Talia L. ^{[1
]}

Weber, Peter K. ^{[2
]}

Liu, Tian ^{[1
]}

Xue, Fei ^{[1
]}

Valenza, Thomas C. ^{[1
]}

Backman, Lavina ^{[3
]}

Opila, Elizabeth ^{[3
]}

Marquis, Emmanuelle A. ^{[1
]}

机构：

[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[2] Lawrence Livermore Natl Lab, Phys & Life Sci, Livermore, CA USA

[3] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA USA

来源：

CORROSION SCIENCE | 2022年 / 209卷

基金：

美国国家科学基金会;

关键词：

NiAl; Oxidation; Grain boundary; NanoSIMS; APT; TEMPERATURE OXIDATION BEHAVIOR; 2 REACTIVE ELEMENTS; CR-AL ALLOYS; STRESS DEVELOPMENT; CREEP RESISTANCE; TI ADDITIONS; YTTRIUM; MICROSTRUCTURE; SEGREGATION; DIFFUSION;

D O I：

10.1016/j.corsci.2022.110798

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation resistance of Ni-based alloys is typically improved by additions of elements segregating to grain boundaries, contributing to reducing scale growth, and improving scale adherence. To develop a mechanistic understanding of doping, outward Al and inward O fluxes through the scale formed on beta-NiAl with Ti, Y, and Ti+Y additions were characterized for oxidation at 1200 degrees C and times up to 100 h. Doped alloys exhibited varying reductions in oxidation rates and Al and O fluxes affecting scale grain morphologies. Ti+Y co-doping further reduced the outward Al and inward O transport compared to doping with Ti or Y alone.

引用

页数：9

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