| The cobalt based alloy has become one of the main magnetic recording targets. Pt, Cr, SiO2 and Co powders were pretreated and mixed with the planetary ball milling. The Co68Cr10Pt14-SiO2 alloy was prepared by vacuum hot pressing. XRD, optical microscope, SEM and magnetic permeability test were used to analyze and characterize the composite powder. The results showed that the Co68Cr10Pt14-SiO2 alloy consist of three phases, which are fcc a-Co soloid solutin, hcp e-Co soloid solutin, and silicon oxide. The density of the prepared CoCrPt-SiO2 alloy was 97.75%, PTF value was 54.44%, and the average patical size of SiO2 was 2.3 (0.5~9.29 μm). The alloy can be used for the preparation of CoCrPt-SiO2 magnetic recording layer by magnetron sputtering. |
