Fig. 3: High-temperature nanoindentation test, stiffness analysis by experiment, and DFT.
From: Hydration-induced stiffness enabling robust thermal cycling of high temperature fuel cells cathode
a Berkovich probe (half angle of 65.27°) and nanoindentation test diagram. b Load-displacement curves under Berkovich probe at 25 °C and 600 °C with a displacement control of 1500 nm. c Variation of Young’s modulus and hardness with temperature during high-temperature nanoindentation. d Cube corner probe (half angle of 35.26°, curvature of radius 40 nm) and nanoindentation test diagram. e Ultra-precision nanoindentation test with cube corner probe in 100 nm. f Theoretical Young’s, Bulk, Shear modulus, and Pugh’s ratio k of BCC and s-BCC-Y calculated by DFT. Source data for (b, c, e) were provided as a Source Data file.
