Detonation sprayed coatings are nowadays applied on many kinds of heavily loaded sliding pairs and in the case high-speed machines. The basic problem in such applications lies in their durability and their scuffing resistance. Detonation sprayed coatings have a different in comparison with other junction surfaces microstructure and their behaviour in boundary condition let us better estimate possibilities of their application. This paper deals with the findings from experiments with regard to the seizure phenomenon when the friction pairing embodies an element with detonation-sprayed coatings. The progression of seizure is examined and evaluated for a number of aluminum oxide-13 titanium dioxide WC-Co 88/12 coatings that were applied to steel by means of detonation spraying. Paper includes a German-language abstract.

In the article the results of set of experiments concerning the changes in microstructure of plasma sprayed Al 2 O 3 , Cr 2 O 3 and W 2 C coatings of tribological test pieces obtained with use of locally applied laser beam treatment are given and discussed. The improvement of sprayed on coating layer adhesion to the steel base was ascertained and evaluated. The possibilities of the application of the described technology for development and production of slide elements of tribological joints are noticed.

This paper presents the results of a study on the scuffing behavior of thermally sprayed ceramic coatings. The progress of building up of seizure is related and evaluated for a set of ceramic coatings embodying a diversity of granulations of Al 2 O 3 TiO 2 and Cr 2 O 3 plasma sprayed on steel, the IHI8N9T steel and carbon-graphite when tested on a roller-block machine. The greatest antiscuffing resistance was recorded for Cr 2 O 3 /carbon-graphite pair. An analysis of regression approximating friction force was carried through.