Effect of cracking in diffusion aluminide coatings on their cyclic oxidation performance on Ti-based IMI-834 alloy

被引：73

作者：

Alam, Md. Zafir ^{[1
]}

Das, Dipak K. ^{[1
]}

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

来源：

CORROSION SCIENCE | 2009年 / 51卷 / 06期

关键词：

Titanium; Thermal cycling; Oxidation; SILICIDE COATINGS; TITANIUM-ALLOYS; PLATINUM; RESISTANCE; ADHERENCE; BEHAVIOR; KINETICS; AL2O3; PLAIN;

D O I：

10.1016/j.corsci.2009.03.027

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Diffusion aluminide coatings improve the high temperature oxidation resistance of Ti-alloys. This study evaluates the oxidation resistance of a Al3Ti type aluminide coating and a Pt-aluminide coating on Ti-alloy IMI-834, at 650, 750 and 850 degrees C under cyclic oxidation conditions in air. Both coatings provide good oxidation resistance, however, the extent of through-thickness cracking in coating and localized oxidation degradation of substrate increases with thermal cycling. At high temperature of 850 degrees C, TiO2 out-growths emanate from these cracks, resulting in a prominent mud-crack pattern on the surface. The possible effect Of Such cracking on long-term oxidation properties of coatings has been discussed. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1405 / 1412

页数：8

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