Enhancing the Oxidation Properties of Gamma Prime + Gamma Platinum Bond Coat by Rhenium and Yttrium Additions for Improved Adhesion of Thermal Barrier Coatings on Nickel-Base Superalloys

被引：0
|
作者：
H. M. Tawancy
机构：
[1] King Fahd University of Petroleum and Minerals,Center for Engineering Research, Research Institute
来源：
Oxidation of Metals | 2015年 / 84卷
关键词：
Thermal barrier coatings; Bond coats; Oxidation; Superalloys; SEM; TEM;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A Re- and Y-modified γ′ + γ Pt bond coat was synthesized by diffusing 25 μm layer of Ni-6 wt%Re–0.5 wt%Y alloy and 5 μm layer of Pt into a Ni-based superalloy. It was observed that the modified bond coat can extend the useful life of thermal barrier coating systems with yttria-stabilized zirconia as top coat by more than double relative to the conventional bond coat synthesized by diffusing 8 μm layer of Pt into the same superalloy. The superior performance of the modified bond coat is explained in terms of the combined beneficial effects of Re and Y on the oxidation properties as determined from thermal exposure tests at 1150 °C and detailed microstructural characterization using various electron-optical techniques.
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页码：491 / 507
页数：16
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