Generation of thermoemf during combustion of mixtures of $\mathrm{Ti}+x\mathrm{B}$

The generation of thermoEMF during combustion of titanium and boron powder mixtures under pressure has been studied. It has been shown that when the boron content in the mixture is less than $2.5$ mol, thermoEMF is generated in the form of a constant positive signal, at $2.5<\mathrm{B}<4.0$ mol, it is generated in the form of a constant negative signal, and at $\mathrm{B}>4.0$ mol, in the form of a negative pulse. The generation of a positive signal is due to the electronic conductivity of titanium particles, and the generation of a negative signal is due to the hole conductivity of boron particles. Experimental dependences of the maximum temperature, average burning speed, and the widths of the combustion wave and thermoEMF on the mole fraction of boron in the mixture have been obtained. It has been shown that the greatest width of the combustion wave is about $10$ mm, and its minimum (critical) width is $1$ mm.