Changes in thermal conductivity and thermal shock resistance of YSZ-SiO2 suspension plasma spray coatings according to various raw material particle sizes. Issue 3 (1st February 2021)

• Record Type: Journal Article
• Authors: Jeon, Hakbeom; Lee, Inhwan; Oh, Yoonsuk
• Is Part Of: Ceramics international. Volume 47:Issue 3(2021)
• Page Start: 3671
• Page End: 3679
• Publication Date: 2021-02-01
• Subjects: Thermal insulation coating -- Suspension plasma spray -- Automotive engine -- Thermal shock resistance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.09.219
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Recently, a technique for improving the thermal efficiency of automotive engines has received considerable attention, namely the application of thermal insulation coatings to automotive engine components to reduce heat loss. This study presents thermal shock resistance and related microstructural changes and thermal properties of 8 wt% yttria-stabilized zirconia (8YSZ)/SiO2 multi-compositional thermal insulation coatings with suspensions of various particle sizes, when subjected to suspension plasma spray. After 10, 000 cycles of thermal shock testing of the coatings, it was found that different degradation behavior related to the different microstructure of the coatings was influenced by the particle sizes of the suspension. The thermal conductivity of the coatings was significantly reduced by increasing the distribution of the unmelted particles within the coating.