Abstract
Abstract The performances of vitrified cBN composites are deeply affected by the wettability of vitrified bonds on cBN particles. CeO2 coated cBN particles were successfully prepared for the further improvement of the covering and wetting of cBN by vitrified bonds. The microstructure and properties of vitrified cBN composites were characterized by scanning electron microscope (SEM), hot stage microscope (HSM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and flexural strength. Results showed that the prepared CeO2 coating on the surface of cBN was uniform and dense. Besides, the improved wettability of vitrified bonds on CeO2 coated cBN particles accompanied with the formation of Ce–O–Al and N–Si confirmed by XPS were supposed to conduce to enhancing the holding power of the vitrified bonds to cBN particles, which resulted in increasing the flexural strength of vitrified cBN composites by 9.16%. Thus, coating cBN with CeO2 was a potential and effective method to obtain vitrified cBN composites with higher flexural strength.
Published Version
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