Influence of ammonium molybdate precursor on Mo powder preparation and working properties

Abstract: Three agglomerated ammonium molybdate precursors were treated with the same continuous processing, containing such as calcinating, deoxidating, pressing, sintering and deep working. The effects aggregation extent of the precursors on Mo powder preparation and working property of the sintered samples were studied. The results showed that the aggregation of the precursors possesses certain heredity. Agglomerated Mo powder was obtained from the agglomerated precursor. The calcination and deoxidation were delayed obviously because of the aggregation. Increasing of the aggregation extent led to the decreased fluidity of Mo powder, causing the density gradient in performs. The increased aggregation of Mo powder caused the decreased sintering activity and the density of sintered products, as well as the worsen ductility and the mechanical properties. [Copyright &y& Elsevier]