Thermionic work function of chemically vapor deposited rhenium on tungsten

This paper presents an investigation of the vacuum work function of chemically vapor deposited (CVD) rhenium. The thermionic emission technique was used in order to obtain high temperature data. Data were collected as a function of temperature and time, and the total pressure was recorded. X-ray analysis showed that the rhenium was preferentially deposited with the 0001 planes approximately parallel to the emitting surface. The effective work function data were compared with the results of Campbell et al. It is concluded that the residual gas pressure was responsible for conflicting work function data