Evaluation of oxidation resistant SiC-ZrB2 composite interlayer for plasma sprayed Y2O3 coating over graphite

被引：0
|
作者：
Madhura, B. [1 ,2 ]
Vetrivendan, E. [1 ,2 ]
Rao, Ch. Jagadeeswara [1 ,2 ]
Ningshen S [1 ,2 ]
机构：
[1] Corrosion Science and Technology Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam,603102, India
[2] Homi Bhabha National Institute, Mumbai,400094, India
来源：
Corrosion Science | 2021年 / 190卷
关键词：
Coatings - Graphite - Plasma spraying - Yttria stabilized zirconia - Oxidation resistance - Silicon carbide - X ray diffraction - Binary alloys - Plasma jets - Yttrium oxide;
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摘要：
The SiC-ZrB2 composite interlayer coating is developed by pack cementation over high density graphite (HDG) for the deposition of plasma sprayed yttria (Y2O3) topcoat for U-Zr (Uranium-Zirconium) melting application. The performance of Y2O3 coating with interlayer for enhancing its durability are investigated by performing thermal cycling experiments at 1450 and 1550 °C. The interlayer morphology with infiltrated and diffused coating of SiC with entrapped ZrB2 particles reduces the differential thermal mismatch stresses and offers passive oxidation protection for HDG. The role of composite SiC-ZrB2 interlayer enhancing threefold increase in the life of Y2O3 coating and its mechanisms at high temperature are provided. © 2021 Elsevier Ltd
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