Encapsulation of a gradient Al2O3 layer on hierarchical structured substrate via two-step hybrid processes

Hae Jin Park; Joon Hak Lee; Young Seok Kim; Sang Chul Mun; Taek Jib Choi; Elyorjon Jumaev; Sung Hwan Hong; Jeong Tae Kim; Jin Man Park; Ki Buem Kim

Materials & Design (Apr 2019)

Encapsulation of a gradient Al2O3 layer on hierarchical structured substrate via two-step hybrid processes

Hae Jin Park,
Joon Hak Lee,
Young Seok Kim,
Sang Chul Mun,
Taek Jib Choi,
Elyorjon Jumaev,
Sung Hwan Hong,
Jeong Tae Kim,
Jin Man Park,
Ki Buem Kim

Affiliations

Hae Jin Park: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea
Joon Hak Lee: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea
Young Seok Kim: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea
Sang Chul Mun: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea
Taek Jib Choi: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea
Elyorjon Jumaev: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea
Sung Hwan Hong: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea
Jeong Tae Kim: Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria
Jin Man Park: Global Production Technology Center (GTC), Samsung Electronics Co., Ltd, 129 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-742, Republic of Korea; Corresponding authors.
Ki Buem Kim: Hybrid Materials Center (HMC), Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Republic of Korea; Corresponding authors.

Journal volume & issue: Vol. 167

Abstract

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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

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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