Microstructural analysis of the role of rhenium in advanced MCrAlY coatings

被引：73

作者：

Czech, N. ^{[1
]}

Schmitz, F. ^{[1
]}

Stamm, W. ^{[1
]}

机构：

[1] Siemens AG, Ruhr, Germany

来源：

Surface and Coatings Technology | 1995年 / 76-77卷 / 1 -3 pt 1期

关键词：

Addition reactions - Fatigue of materials - Fatigue testing - Metallographic microstructure - Metallography - Metallurgy - Oxidation - Phase equilibria - Rhenium - Scanning electron microscopy - Strength of materials;

D O I：

10.1016/0257-8972(95)02546-4

中图分类号：

学科分类号：

摘要：

Additions of 1-3 at.% of rhenium can considerably improve the properties of MCrAlY coatings, in particular the endurance of high-temperature fatigue. As only limited information exists about the role of rhenium in the metallurgy of MCrAlY, microstructural investigations have been undertaken to study the phases present in the 'as-coated' condition and also after long-term high-temperature exposure. The methods used for investigation were optical metallography and scanning electron microscopy (SEM). Qualitative and quantitative evaluations show that rhenium has a complex influence on the phase equilibria in the coatings. To prove the influence of Re and Al on the thermal mechanical fatigue properties. TMF tests have been carried out.

引用

页码：28 / 33