Combustion joining of refractory materials

Reactive resistance welding of Ti6Al4V alloy with the use of Ni(V)/Al multilayers

“…Reactive resistance welding (RRW) technique was developed for combustion joining of refractory materials like W, Ta or Nb with the use of powders exhibiting negative enthalpy of mixing, like those from Ni–Ti system. The reaction of the latter, serving as a filler material, results in a strong exothermic effect, capable to melt it and to wet the surfaces to be joined . This interesting method takes advantage of a local heat built up, taking place as DC currents passes through material of higher resistance like in present case.…”

Shear Strength of Reactive Resistance Welded Ti6Al4V Parts with the Use of Ni(V)/Al Multilayers

“…[7] However, due to problems with handling of powders and their spreading in a layer of same thickness, new filler materials like Ni/Al multilayers are tried. [6] Application of the reactive multilayers instead of powders not only allowed to reduce the thickness of the filler material from~1 mm to< 100 lm, but also to lower the electric current down to 400 A.…”

The effect of urea:nitrate ratio on the structure and luminescence properties of YVO4:Dy3+ phosphors

“…Synthesis of YVO 4 has been previously prepared by the sol-gel method [7], solid state reaction, hydrothermal process [8], microwave heating process [9,10]. The combustion method is one of the ideal techniques, because an exothermic reaction is initiated at the ignition temperature and it generates heat which is manifested in a maximum temperature of 1000-1650 K [11]. Zhang et al [12] prepared YVO 4 :Dy 3 þ phosphor using sol gel and found agglomerated particles.…”