【摘要】 介绍了超临界流体镍基金刚石复合电铸的实验方法及工艺。采用扫描电镜和显微硬度仪表征镍基金刚石复合电铸层的表面形貌和显微硬度,分析金刚石微粒的质量浓度和工作压力对复合电铸层显微硬度的影响,并与普通复合电铸层的进行对比。结果表明:超临界CO2流体独特的理化特性,可有效提高镍基金刚石复合电铸层的表面质量。工作压力为10~14MPa时,超临界CO2流体环境对金刚石微粒的分散效果良好。在工作压力10MPa,金刚石微粒50g/L时,复合电铸层的显微硬度达到9 100MPa。更多还原

【Abstract】 The experimental method and process of Ni-diamond composite electroforming under supercritical fluid environment are introduced.The surface morphology and micro-hardness of Ni-diamond composite electroforming layer were characterized by scanning electron microscope and micro-hardness tester,the effects of the mass concentration of diamond grains on the micro-hardness of the composite electroforming layer were analyzed,which was also compared with common electroforming layers.The results show that the surface quality of Ni-diamond composite electroforming layer can be effectively improved by the unique physical and chemical characteristics of CO2supercritical fluid.When the working pressure is 10~40MPa,the CO2supercritical environment has a good distribution effect on the diamond particles.When the working pressure was 10 MPa and the mass concentration of diamond particles is 50 g/L,the micro-hardness of the composite electroforming layer can reach 9 100MPa.更多还原