Microstructure and mechanical properties of YSZ-alumina composites designed for thermal barrier coatings
Amirhossein Pakseresht, Mohammad Mousavi, M. Saremi, Ehsan Ghasali, Hossein Rajaei
Abstract
Over the last years, there has been a growing number of studies on YSZ-alumina coatings relevant to the field of thermal barrier coatings. These coatings, either in the form of whiskers or particles reinforced, have been shown to have better properties in comparison to conventional counterparts. Apart from other aspects related to coatings, it is interesting to pose the question: is there any interaction between YSZ and alumina particles which would lead to the amelioration of the properties? Therefore, this study was launched to address the microstructural and mechanical features of YSZ-alumina composites. Since examination and detection of the phases that might be formed in the YSZ-alumina binary system would be a difficult task if the samples had been prepared by the common techniques for the coating preparation, Spark Plasma Sintering was employed to achieve dense samples to find a correlation between the microstructure and mechanical properties.