Abstract
Ytterbium zirconate (Yb2Zr2O7) is one of the most promising materials for yttria-stabilized zirconia (YSZ) replacement as a thermal barrier coating (TBCs) application. In the presented report, the experimental synthesis of Yb2Zr2O7 coating using novel Reactive Plasma Spray Physical Vapor Deposition (Reactive PS-PVD) is described. The obtained coating, irrespective of the power current (1800, 2000 and 2200 A), was characterized by a hybrid structure and a thickness of about 80–110 μm. The results of XRD phase analysis showed the formation of ytterbium zirconate in the coating but the presence of ytterbium and zirconium oxides was also detected. The oxides were not observed in calcinated powder. The decrease in thermal conductivity with power current increase was observed. It was the result of higher thickness and better columnar structure of the coating obtained using higher power current of the plasma torch.
Highlights
IntroductionDifferent types of ceramic materials have been considered as an alternative to yttria-stabilized zirconia oxide: mulite, rare-earth oxides, alumina oxide and silicates [2]
They are characterized by lower thermal conductivity in comparison with conventional yttria-stabilized zirconia (YSZ) [6]
We proposed a new Reactive Plasma Spray Physical Vapor Deposition (PS-PVD) method and the formation of well-investigated gadolinium zirconate during reaction of gadolinia and zirconia oxides in a plasma plume [32]
Summary
Different types of ceramic materials have been considered as an alternative to yttria-stabilized zirconia oxide: mulite, rare-earth oxides, alumina oxide and silicates [2]. The different method of thermal spray processes [4] as well as EB-PVD might be used for their formation [5]. They are characterized by lower thermal conductivity in comparison with conventional YSZ (yttria-stabilized zirconia) [6]. Moskal et al [9] proposed the two concepts of ceramic coatings formation: single-layer Nd2 Zr2 O7 as well as a double layer coating (DLC)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
