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Articles

Water vapor retards grain growth during sintering of yttria-stabilized zirconia pellets and coatings

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By Jeonghwan Park, Sangmin Park, Mingyu Kim, Yeon-Gil Jung, Unseo Kim, Gyeongryeol Bae, Seunghyun Bae, Dowon Song
| Nature Verified
Abstract Yttria-stabilized zirconia (YSZ) is the benchmark thermal barrier topcoat, but its sintering response to water vapor is unclear. YSZ pellets of three initial porosities and free-standing plasma-sprayed coatings were heat-treated at 1300 °C in dry air, steam, or dry nitrogen. Contrary to reported promotion in simple oxides, steam retarded microstructural evolution.
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