铜包纳米铁粉的制备及其结构表征

发布时间：2018-03-03 13:05

本文选题：纳米材料　切入点：粉末冶金　出处：《粉末冶金材料科学与工程》2017年03期 　论文类型：期刊论文

【摘要】：将30~80 nm的纳米铁粉置于含无水乙酸铜的非水溶剂中,利用表面置换反应法制备铜包覆纳米铁粒子,并基于铜包覆铁纳米粉末制备出晶粒细小的Fe-Cu-C粉末冶金材料。采用X-射线衍射(XRD)、透射电子显微镜(TEM)、热重分析(TGA)和差示扫描量热法(DSC)对样品的组织结构、形貌、尺寸、相组成以及抗氧化性能进行研究。结果表明:铜包覆纳米铁粒子具有典型的核壳型结构,铜层厚度约10 nm,铜包覆纳米铁粒子比常规气体钝化法制备的纳米铁粉末表现出更好的抗氧化性能,与氧气发生反应的温度为190℃,明显高于普通钝化铁粉与氧气发生反应的温度130℃。以铜包覆纳米铁粉为主要原料,通过普通压制烧结成功制备了Fe-Cu-C粉末冶金材料,烧结体的相对密度为90%,晶粒尺寸约为10μm。
[Abstract]:Non water solvent 30~80 nm in nanometer iron powder containing anhydrous copper acetate, preparation of copper coated iron nanoparticles by surface replacement reaction method, and copper coated iron powder was prepared by nano Fe-Cu-C powder metallurgy material based on fine grain. By using X- ray diffraction (XRD), transmission electron microscopy (TEM), thermal thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) structure on the morphology, size, phase composition and antioxidant properties were studied. The results show that the copper coated iron nanoparticles with core-shell structure, the copper layer thickness of about 10 nm, iron powder of nano copper coated iron nanoparticles compared with conventional gas passivation prepared exhibit better anti-oxidation properties, react with oxygen, the temperature is 190 DEG C, was significantly higher than that of ordinary iron passivation reacts with oxygen to the temperature of 130 degrees Celsius. The copper coated iron nanoparticles as raw material, by ordinary pressure Fe-Cu-C powder metallurgy material has been prepared successfully by sintering. The relative density of the sintered body is 90%, and the grain size is about 10 mu m..

【作者单位】：中南大学粉末冶金国家重点实验室;
【基金】：国家重点实验室自主开放课题(621020076)
【分类号】：TB383.1;TF125

【相似文献】