TY JOUR TI WEAR-RESISTANCE INCREASE IN SURFACES OF SPHERICAL SLIDING BEARINGS KW wear-resistance KW multi-layer antifriction coating KW friction surface KW spherical sliding bearing KW plasma strengthening JO Bulletin of Bryansk state technical university AU Gorlenko, A.O. AU Erokhin, A.. PY 2016 IS 2016 PB Bryansk State Technical University