Phases of titanium combustion in air

摘要: Single titanium (Ti) particles in the 240–280 μm size range with uniform initial diameter, temperature, and velocity were formed a pulsed micro-are burned room temperature air. Combustion temperatures measured real time using three wavelength optical pyrometer. Particles quenched at different combustion times, cross-sectioned, their internal compositions studied high-resolution x-ray electron microprobe technique. Rapid quenching by particle impingement on thin cold metal foil was used to freeze phases existing burning droplets. Results show that maximum considerably less than boiling (volatilization) of either or its oxides. A radiation brightness jump observed during addition explosion which terminated burning. The occurred around eutectic precipitation stoichiometric oxide, Ti 2 O 3 , from liquid Ti-O solution. did not explode when they an inert gas, namely argon. However, jumps simultaneous environment decreased same temperatures. rapidly contained ternary Ti-O-N solutions rather oxide nitride for slowly gas. During combustion, concentration nitrogen dissolved attained value then while oxygen continually increased.