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 nit rogen and the action of an additional current is studied. It is establ ished 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 additiona l current is the interaction product of dispersed initial components o f the bronze - tungsten disulfide composite and a layer of new chemica l compounds of the Me2C type with similar parameters to a high-tempera ture modification of the compound Cu2S. It is assumed that formation o f this compound is the result of intense pulse action of microvolumes of the material at points of contact of the body with the counterbody.