Synthesis and characterization of micro-spherical tungsten-molybdenum alloy particles using spray drying combined with microwave assisted calcination process

摘要

Tungsten-molybdenum (W-Mo) alloy is widely used as high temperature materials. In this study, well-dispersed micro-spherical W-Mo alloy (in any Mo equivalent) particles were achieved by spray drying combined with twostep microwave assistant calcination from commercial (NH4)loW(12)O(41) and (NH4)(6)Mo7O24. The morphology and size of as-synthesized W-Mo alloy particles were controlled by spray drying treatment. The influences of calcined temperature in the microwave assistant calcination on the phase, morphology and size of W-Mo particles were investigated. The size distribution of as-prepared W-Mo alloys particles was between 1 and 8 mu m, and the average size was about 3 mu m. The as-synthesized W-Mo alloy powder shows good sintering property. It should be noted that the powder technology in this study can be applied to synthesize other alloys powders (binary, ternary and more) with high-performance requirements.