Year: 2020
Type: article
Abstract: Rapid laser reactive sintering (RLRS) is an additive manufacturing process which enables the quick and efficient fabrication of a wide range of ceramic‐based cells with various geometries and microstructures. Herein, the preparation of La0.8Sr0.2CrO3–δ interconnects by RLRS for solid‐oxide fuel/electrolysis cells (SOFC/ECs) is demonstrated. Uniform perovskite structure without residual intermediate phases can be achieved by CO2 laser irradiation at 103 W with a scanning speed of 0.07–0.10 mm s−1. Narrowing the width of the underlying MgO substrate and deposition of a terpineol‐based slurry with a solid loading level of less than 4 g m−2 are found to be critical parameters to avoid cracking and delamination. The optimum laser conditions balance Cr loss and densification of La0.8Sr0.2CrO3–δ resulting in an 11‐μm‐thick RLRS‐derived La0.8Sr0.2CrO3–δ film having a high relative density of 80–95% with a low area specific resistance (ASR) of 0.003 Ω cm2 at 600 °C. This ASR is more than 30 times lower than that of furnace‐sintered La0.8Sr0.2CrO3–δ in the same thickness range. The RLRS technique is promising for quick and efficient preparation of dense and thin La0.8Sr0.2CrO3–δ which are key components for highly compact SOFC/ECs.
Source: Energy Technology
Authors: Akihiro Ishii, Shenglong Mu, Yuqing Meng, Hua Huang, Jincheng Lei, Yanjun Li, Fei Peng, Hai Xiao, Jianhua Tong, Kyle S. Brinkman
Institution: Clemson University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3080499670