Text this: Gas-Phase Reactions in Nano-Strand Formation from Al-Fe-Ni Powder Reacted with CaF<sub>2</sub>-SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>-MgO-MnO-TiO<sub>2</sub> Flux at 1350 °C: SEM Study and Diffusion Calculations