The Evaporation of Titanium

Data are presented on the evaporation rate of β titanium over the tem perature range 1,650-1,810° K. These are represented by log ET 1/2 = - (2.42/ T ) + 9.79, where E is in gm cm -2 sec -1 and T is in degrees Kelvin. The latent heat of vaporization is deduced both from the measured values of evaporation rate, together with known thermodynamic functions of the solid and gas, and also from the temperature coefficient of evaporation rate. An estimate is made of the variation of total radiation with temperature, and of the vapour pressure at the melting point. Experimental details are given