银基氟化镁材料的研究

采用粉末冶金的方法制备了银基氟化镁材料。利用X射线衍射仪、金相显微镜和差热分析仪等对其组织结构进行分析，同时对其硬度、电导率、密度和摩擦系数等进行了测试。结果表明：形成的合金相对密度达98％以上，银与氟化镁能达到原子级别的结合：在银中添加氟化镁，样品的电导率有较大幅度的下降，并且晶粒显著细化，但材料的硬度提高不大，对银和铜的摩擦系数没有明显的降低。因此，氟化镁不能作固体自润滑材料的添加剂。

Research on MgF2 Materials of Ag Base

The silver base materials containing MgF2 were synthesized by powder metallurgy method. The micro-structures were studied by X-ray diffraction, metallograph and thermal analysis. The hardness, conductance, density and the friction coefficient of materials were tested. The results indicate that the Ag and MgF2 were combined in an atom range with a relative density over 98%, and the conductance of Ag samples added with CaF2 declined obviously; and the grains became thinner obviously. The hardness of material did not obviously increase and and the fi-iction coefficient to Ag and Cu did not obviously decline. In a word, the MgF2 can not be used as the additives of the solid self-lubricating materials.