Tribological behaviour of MoS2/Au coatings

This study aims to enhance the endurance of MoS2 coating by applying a thin layer of Au (a arrow right 480nm) on MoS2 surface. Experimental results show that the addition of Au film increases the endurance of MoS2/Au over equivalent coatings without Au. The friction coefficient rapidly decreases to a stable value (I14 a arrow right 40.045) after about 100cycles sliding. After more than 15,000cycles, the friction coefficient gradually increased to a second stable value (I14 a arrow right 40.15). An average endurance of over 50,000cycles was measured in this case. The Au or Au-MoS2 composite layer can effectively prevent oxygen or moisture reaction with MoS2 and hence significantly increases the wear life.