Protocol for selecting exemplary silicate deposit compositions for evaluating thermal and environmental barrier coatings

A protocol for selecting representative silicate compositions comparative testing of gas turbine coating materials is presented. It begins with a curated dataset engine deposits and naturally occurring siliceous debris including volcanic ashes, sands, dusts. The are first reduced to the five major oxides—those Ca, Mg, Fe, Al, Si—and then distilled further using principal component analysis k-means clustering. process ultimately yields four classes possible common chemical characteristics. Each class represented by composition centroid range in Ca:Si ratios. Key thermophysical properties calculated related glass network connectivity, characterized Si:O ratio. Finally, from each these compared terms their reactions prototypical thermal environmental barrier oxides, due consideration effects variations within deposit class. is, principle, adaptable datasets compiled OEMs researchers coatings.