{"id":648456,"date":"2025-01-09T09:50:19","date_gmt":"2025-01-09T06:50:19","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/material-acts-as-biomimetic-for-teak-wood-creating-environmental-barrier-coating\/"},"modified":"2025-01-09T09:50:19","modified_gmt":"2025-01-09T06:50:19","slug":"material-acts-as-biomimetic-for-teak-wood-creating-environmental-barrier-coating","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/material-acts-as-biomimetic-for-teak-wood-creating-environmental-barrier-coating\/","title":{"rendered":"#Material acts as biomimetic for teak wood, creating environmental barrier coating"},"content":{"rendered":"
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\n \"Biomimetic
\n The multi-scale layered structure of teak wood endows it with exceptional mechanical properties and environmental stability, which has inspired the biomimetic design of environmental barrier coatings. In this study, a multi-scale nano Yb2<\/sub>Si2<\/sub>O7<\/sub>-Yb2<\/sub>SiO5<\/sub> composite EBC with a teakwood-like lamellar structure has been realized by a novel alternating vapor\/liquid phase deposition method in plasma spraying-physical vapor deposition (PS-PVD). In this process, the SiO2<\/sub> that is volatilized from Yb2<\/sub>Si2<\/sub>O7<\/sub> is recaptured and deposited, and then undergoes an in-situ reaction with Yb2<\/sub>SiO5<\/sub> in the coating through heat treatment, leading to the formation of Yb2<\/sub>Si2<\/sub>O7<\/sub> and the construction of a regularly arranged multi-layered nanostructure. The coating designed with this structure is expected to significantly enhance its mechanical performance and corrosion resistance, offering the potential for long-term protection of aircraft engines in high-temperature environments. Credit: Journal of Advanced Ceramics, Tsinghua University Press
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Researchers have developed an innovative technology<\/a> in plasma spraying-physical vapor deposition known as alternating vapor\/liquid phase deposition. By adjusting the arc current, researchers can finely control the evaporation and deposition of SiO2<\/sub>, and through a heat treatment process, achieve in-situ reactions that optimize the composition, structure, and nanoscale dimensions of the coating, creating an orderly arranged, multi-layered, teak-like biomimetic structure within it.<\/p>\n

They conducted an in-depth analysis of the complex deposition mechanisms involved in this process. This new teak-like biomimetic structure coating is expected to significantly enhance its mechanical properties and corrosion resistance, providing an innovative coating protection strategy for high-temperature app<\/a>lications in the field of gas turbine engines.<\/p>\n

The team published<\/a> its work in the Journal of Advanced Ceramics<\/i>.<\/p>\n

“Biomimetic research on environmental barrier coatings is relatively rare, primarily because there are significant challenges in precisely controlling the composition and structure of the coatings during the high-temperature spraying process. We have chosen teak, known for its excellent mechanical properties and environmental durability, as the biomimetic subject,” said Dr. Guifang Han, the corresponding author of the paper, a professor in the School of Materials Science<\/a> and Engineering at Shandong University.<\/p>\n

“By employing the vapor-liquid phase interval deposition method and regulating parameters during the spraying process, such as arc current, we have achieved the evaporation and deposition of SiO2<\/sub>, thereby constructing a regularly arranged multi-layer structure within the coating. This unique deposition mechanism allows us to mimic the natural layered structure of teak, which is crucial for enhancing the mechanical properties and corrosion resistance of the coating,” Dr. Han continued.<\/p>\n

“From a thermodynamic perspective, we have conducted an in-depth analysis of the deposition mechanism of volatilized SiO2<\/sub> gas during the spraying process. We have ingeniously applied heat treatment technology to facilitate an in-situ reaction between the gas-phase deposited SiO2<\/sub> and Yb2<\/sub>SiO5<\/sub>, which is produced from the decomposition of Yb2<\/sub>Si2<\/sub>O7<\/sub> powder, to re-form Yb2<\/sub>Si2<\/sub>O7<\/sub>. This approach allows us to simultaneously regulate the composition, structure, and nanoscale dimensions of the coating, successfully achieving a functional structure that biomimics teak wood,” said Dr. Han.<\/p>\n

Despite the progress made, there is still much to explore in the field of biomimetic teak structure environmental barrier coatings. In this regard, Han also emphasized that the key to future research will be the systematic evaluation of the corrosion resistance and mechanical properties of these coatings, and comparing them with the findings in existing literature to verify their effectiveness in practical applications.<\/p>\n

The ultimate vision of the research is to commercialize these coating technologies, thereby enhancing the protection efficiency of high-temperature applications such as gas turbine engines.<\/p>\n

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More information:<\/strong>
\n\t\t\t\t\t\t\t\t\t\t\t\tJungui Zhang et al, Regulating the composition, structure, and nanoscale dimensions of Yb2<\/sub>Si2<\/sub>O7<\/sub> environmental barrier coating to achieve a biomimetic teakwood-like functional structure by waste gas recycling, Journal of Advanced Ceramics<\/i> (2024). DOI: 10.26599\/JAC.2024.9221021<\/a><\/p>\n<\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\tProvided by
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tTsinghua University Press\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<\/p><\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\tCitation<\/strong>:
\n\t\t\t\t\t\t\t\t\t\t\t\tMaterial acts as biomimetic for teak wood, creating environmental barrier coating (2025, January 8)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 9 January 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news<\/a>\/2025-01-material-biomimetic-teak-wood-environmental.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

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