On the connection between the adhesive strength and temperature drops in heat-protective coatings

We propose a procedure and results of experimental determination of the dependence of adhesive strength of a ZrO sub 2 plasma-sprayed heat-protective coating with NiCr sublayer on the value of the stationary temperature drop in it. The dependences of the adhesive strength on the temperature of the surface of adhesive contact are compared for homogeneous and inhomogeneous temperature fields. The results obtained enable us to substantiate the choice of temperature drop in heat-protective coatings with regard for the adhesion safety factor. Substrate materials: 1Kh18NT10 steel and BrKh08 alloy. Graphs., 15 ref.