Abstract
In this appraisal, the areas of research involved in the development of coating systems for high–temperature turbine components are discussed. The potential for further work is considered bearing in mind that there are two groups (engine manufacturers and coating producers and industrial and academic research workers) who will have different requirements for the type of work that they wish to pursue. Both conventional and alternative coating processes require further work, whether in improving existing systems or developing new ones; seeking out the advantages while keeping costs down. The importance of accurate assessment of the environmental changes produced in burner rig tests is stressed. When considering mechanical properties of coated components, it is the manner in which the load bearing cross–section is compared that determines the results obtained. In the field of new coatings, ideas for new compositions, more chemically resistant oxides for thermal barrier coatings, and the requirement for coatings for other areas of the turbine are highlighted as directions for future developments.
MST/301
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