Thermal outgassing behavior and photoemission studies of Haynes Alloy 214

Processing of many materials at high temperatures requires a high purity environment. The outgassing from hot surfaces of the processing chamber or the heating elements is a potential problem. The total amount of outgassing as well as the time- and temperature- dependent outgassing rates are important. The outgassing from Haynes Alloy 214 has been studied experimentally under a vacuum in the temperature range from room temperature to 600 °C. In addition to the outgassing rates, the composition of the outgassed species was determined through mass spectrometric analysis. Alloy surface composition was determined by x-ray photoelectron spectroscopy. Changes in surface composition before and after heating can be accounted for by the outgassed species.