The problems associated with nickel‐based superalloys with heat‐resisting coatings, as used in aerospace, have been addressed in this paper. The influence of the heat‐resisting coating technology on both the fatigue and creep behaviour of the alloys has been shown. Low‐cycle fatigue and creep tests have been performed. Lifetime conditions have been determined in relation to low‐cycle fatigue, isothermal creep and creep at cyclically variable temperatures, as a function of the chemical composition of the coating, parameters of the thermal treatment and thickness of the coating. Possible processes and mechanisms of fracture are discussed.

CDUVTCEV< Detailed study of the coexistence of zinc blende and wurtzite phases in the luminescent layer and quantitative relations between phases after ageing processes of ZnS:Cu:Cl phosphors has been performed by means of cross-sectional transmission electron microscopy (XTEM). The diffraction analysis of as-fabricated phosphors revealed that in the ZnS:Cu:Cl layer only the zinc blende phase exists. However, in aged phosphors both zinc blende and wurtzite phases with the zinc blende phase dominating can be observed. Additional cathodoluminescence (CL) analysis of ZnS:Cu:Cl grains carried out in a scanning electron microscope (SEM) confirmed that the Cu-dopant influenced the luminescence properties of ZnS:Cu:Cl phosphors. TGHGTGPEGU"Alexander P W, Sherhod C and Stowell M J 1988