Influence of Vanadium Additions on the Performance of Mo₃Si  

作　　者：I. Rosales-Cadena I. Rosales-Cadena(Center for Research in Engineering and Applied Sciences, Cuernavaca, Mexico)

机构地区：[1]Center for Research in Engineering and Applied Sciences, Cuernavaca, Mexico

出　　处：《Materials Sciences and Applications》2021年第7期345-352,共8页材料科学与应用期刊（英文）

摘　　要：Several molybdenum silicides based alloys were produced by arc cast method with different vanadium additions. The microstructures revealed mainly single phase in samples with precipitation of second phases segregated to the grain boundaries. Lattice parameter and density measurements with different V concentrations have been correlated with lattice distortion. Mechanical properties studies were carried out, showing a decreasing behavior in microhardness while fracture toughness value increases at intermediate concentrations. Results indicated that vanadium alloying produces a significant effect on grain growth behavior and second phase precipitation.Several molybdenum silicides based alloys were produced by arc cast method with different vanadium additions. The microstructures revealed mainly single phase in samples with precipitation of second phases segregated to the grain boundaries. Lattice parameter and density measurements with different V concentrations have been correlated with lattice distortion. Mechanical properties studies were carried out, showing a decreasing behavior in microhardness while fracture toughness value increases at intermediate concentrations. Results indicated that vanadium alloying produces a significant effect on grain growth behavior and second phase precipitation.

关 键 词：SILICIDES INDENTATION HARDNESS Fracture Toughness Lattice Parameter 

分 类 号：TG1[金属学及工艺—金属学]