Crack healing has great effect on monotonic strength of ceramics. Also the crack-healing effect on fatigue behavior is an interesting issue. Three kinds of Al2O3/30 vol.% SiC composites that have differences in crack-healing ability and fracture toughness were hot pressed. Static fatigue behaviors of these crack-healed specimens were investigated. From the experimental results, the static fatigue limits of three kinds of Al 2O3/30 vol.% SiC composites were 800, 700, and 1000 MPa, respectively. Furthermore, the fractures seldom initiated from the healed crack. Therefore, it was found that using the crack-healing forbade stress corrosion cracking from the original surface cracks, thereby leading to large increment in fatigue strength. The results, however, demonstrated that fatigue cracks were generated by applying high tensile stress. The general mechanism of fatigue cracks was discussed by using surface morphology.

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Cube-structured silver nanoparticles (AgNCs) were synthesized and modified with oligo(ethylene glycol) (OEG)-attached alkane-thiol ligands. They showed thermo-responsive color changes dispersed in water and also good dispersibility in CHCl3. They formed well-packed assembled structures at the air-water interface. AgNC assembled films also showed a strong plasmonic property and thermo-responsiveness.

High-color-purity, efficient, and long-lifetime organic light-emitting devices have been successfully developed. The optimized device realized an FWHM of 32 nm, CIE of (0.28, 0.67), EQEmax of nearly 19%, and LT50 of 14 000 h at 1000 cd m−2.

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