A novel label-free electrochemical immunosensor for ultra-sensitively detecting prostate specific antigen based on the enhanced catalytic currents of oxygen reduction catalyzed by core-shell Au@Pt nanocrystals

Key Words:硫化锌;锶;复合变质;过共晶铝硅合金
Abstract:以Al-24Si合金为研究对象,通过添加不同含量的ZnS中间体和Al-Sr中间合金作为变质剂,利用金相显微镜(OM),X射线衍射仪(XRD)、能量分散谱仪(EDS)等分析手段研究了亚微米级ZnS、Sr复合变质对Al-24Si合金组织形貌的影响,结果表明:亚微米级ZnS与Sr复合变质能同时细化初晶硅和共晶硅,二者不会干扰各自的变质效果,可将初晶硅平均尺寸由120μm细化至30μm以下,共晶硅由针片状变质至短棒状或纤维状。
Volume:v.41;No.183
Issue:02
Translation or Not:no