Thermal expansion and heat capacity of Sm₂ScTaO₇ – A promising material for thermal barrier coatings

Abstract

The experimental results presented for Sm 2 ScTaO 7 pyrochlore in this study, temperature dependence of heat capacity and retaining the pyrochlore structure with the temperature variation, as well as the constant value of the thermal expansion coefficient in a wide temperature range, can be considered as evidences for the absence of a previously reported phase transition in the high-temperature region for this compound. This means that Sm 2 ScTaO 7 pyrochlore is no doubt a promising material for thermal barrier coatings. K E Y W O R D S3+/5+ pyrochlores, phase transition, thermal barrier coatings (TBC), thermal expansion, X-ray methods 4416 | GAVRICHEV Et Al.