Protective coatings preventing hydrogen desorption from titanium during ion irradiation

Effect of yttria and titanium nitride coatings on features of deuterium desorption from titanium layer is investigated. It is shown that both coatings significantly raise the temperature of maximum of deuterium thermal desorption from titanium under linear heating and prevent desorption under prolonged keeping at the operating temperature of a neutron tube target. However, under irradiation with ions of H₂ + O₂ plasma the barrier properties of titanium nitride appear to degrade. (paper)