Novel antifriction and wear-resistant composite coating with self-sensing detection and its luminescent properties

The novel wear-resistant composite coating with self-sensing capability is successfully developed by vacuum pressure-assisted sintering. Luminescent properties of the composite coating can serve as an indicator, warning when and where the coating has worn off. The microstructure, phase structure, luminescent property was investigated by scanning electron microscope, energy dispersion spectroscope, X-ray diffraction analyzer and fluorescence spectrophotometer. Pin-on-disc friction testing machine (MMW-1A) is used to wear the composite coating away. Results show that the coating is composed of β+γ₂+k metallic phases and the phosphorescent crystalline phases. The composite coating emits blue-green light peaking at 510 nm under ultraviolet light and its friction coefficient is 0.26. Indicating function and wear resistant property of the composite coating are well coupled.