Fig. 2: Design and characterization of the structured thermal armor (STA).
From: Mitigating hypersonic heat barrier via direct cooling enhanced by leidenfrost inhibition
a Design of the micro-pillared substrate (length: width: thickness = 25 mm: 25 mm: 2 mm). The protruding edge is designed for convenient STA fixture in thermal experiments. b Digital image of the fabricated micro-pillared substrate. c SEM images of the fabricated micro-pillared substrate. The width and spacing of the pillars are a = 300 µm and b = 300 µm. d Digital image of the fabricated STA. e SEM images of the fabricated STA. f SEM images of the SiO2 nanofibrous membrane, presented with multiple magnifications to detail its structural characteristics. g Cross-sectional SEM images of the fabricated STA. The height of the pillar h = 650 µm and the thickness of the membrane α = 100 µm.
