STRUCTURAL AND PHASE-TRANSFORMATIONS WITH FRICTION IN A BRONZE TUNGSTEN DISULFIDE COMPOSITE

The nature of secondary structures which form protective layers on the friction track of a (bronze-tungsten disulfide composite)-steel pair under vacuum friction conditions using a screen cooled with liquid nitrogen and the action of an additional current is studied. It is established that in all of the cases in question there is no reciprocal mass transfer of the materials in contact. A homogeneous protective layer covering the working friction surface under the action of an additional current is the interaction product of dispersed initial components of the bronze - tungsten disulfide composite and a layer of new chemical compounds of the Me2C type with similar parameters to a high-temperature modification of the compound Cu2S. It is assumed that formation of this compound is the result of intense pulse action of microvolumes of the material at points of contact of the body with the counterbody.