A study of CO adsorption on room temperature Al-Zr has been done using Auger electron spectroscopy and gas pressure measurements. The atomic surface composition of clean Al-Zr surfaces prepared in UHV by Ar** plus sputtering was measured as a function of CO pressure and exposure time. The absorbed C and O have the same rate constants and surface concentrations for exposures less than 2 Langmuir. Above this exposure quasi-saturation occurs. The measured sticking probability of CO on Al-Zr is constant, S equals 0. 7 plus or minus 0. 3, for fractional coverage theta APP 1STH 0. 5. Above this point S decreased rapidly. The effect of surface roughness on the apparent sticking coefficient has been calculated by a Monte Carlo simulation. Reactivation of Al-Zr by heat treatment to 700 degree C has also been investigated.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of vacuum science & technology|
|State||Published - 1980|
|Event||Proc of the Natl Symp of the Am Vac Soc, 27th, Pt 2 - Detroit, MI, Engl|
Duration: Oct 13 1980 → Oct 17 1980
All Science Journal Classification (ASJC) codes