Encapsulation of a gradient Al2O3 layer on hierarchical structured substrate via two-step hybrid processes
Hae Jin Park, Joon Hak Lee, Young Seok Kim and 7 more
Materials & Design · 2019
doi:10.1016/j.matdes.2019.107616 (opens in a new tab)
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Abstract
The gradient Al2O3 layer coated bimodal structured composite substrate was fabricated using combined chemical and hydrothermal processes. Selective etching was performed to remove micrometer-sized α-Al dendrites from the ultrafine structured matrix. Simultaneously, a hydrothermal oxidation process was used to grow Al2O3 on the surface of the porous structured substrate. In particular, the architecture of coated metal oxide (Al2O3) can be altered from a rectangular to a pyramidal shape depending on the hydrothermal process time. Keywords: Ultrafine eutectic composite, Porous materials, Dealloying, Hydrothermal process
Abstract licence: CC BY-NC
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