期刊
SURFACE & COATINGS TECHNOLOGY
卷 449, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128949
关键词
Yttria-stabilized zirconia; Thermal barrier coatings; Optical properties; Microstructure; Pore size distribution
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) Strategic Network on Green Surface Engineering for Advanced Manufacturing (Green-SEAM) [NETGP 493955-16]
As the operating temperatures increase, the thermal barrier coatings may be less efficient in protecting the underlying metallic components. A study compared the optical performance of atmospheric plasma sprayed (APS) and suspension plasma sprayed (SPS) yttria-stabilized zirconia (YSZ) coatings and found that SPS samples offer higher radiation blocking properties due to a more uniform distribution of pores with a smaller average pore diameter.
Thermal radiation is an increasingly important issue for thermal barrier coating (TBC) applications in aircraft engine components. As operating temperatures increase, the radiative part of the heat load increases significantly faster than the conductive portion; as such, TBCs may not be as efficient in protecting their underlying heat -sensitive metallic components. To address this issue, new coating morphologies must be investigated. In this study, we compare the optical performance of atmospheric plasma sprayed (APS) and suspension plasma sprayed (SPS) yttria-stabilized zirconia (YSZ) coatings. First, we extract their absorption and scattering coefficients from spectrophotometry measurements via the inverse adding-doubling (IAD) method. The microstructure of the coatings is then analyzed and compared using scanning electron microscopy (SEM) and mercury infiltration porosimetry (MIP). SPS samples are found to offer higher radiation blocking properties due to a more uniform distribution of pores with an average smaller pore diameter than the APS samples. This results in an overall higher pore density, with each pore interface acting as a scattering site, and therefore a higher propensity for scattering events.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据