Preparation and Coefficient of Friction of YBa2Cu3O7-δ/Graphene Oxide Composites

Abstract

YBa2Cu3O7-d/graphene oxide (YBCO/GO) composite materials were fabricated by using powder metallurgy process combined with cold isostatic pressing (CIP) technique. The coefficient of friction (COF) of YBCO matrix composites with addition of 0, 0.5, 1.0 and 2.0 wt% GO were reported for the first time. The friction behavior was observed by means of the ball-on-disk technique with a steel ball used as the counterpart in ambient atmospheric and dry sliding condition. The measured properties were then assessed with respect to sliding speed and the mass fraction of the GO additives. GO is able to reduce COF and brittleness for YBCO ceramic. The excellent performance offers materials with 0.5 wt% GO, which has the lowest COF and lightest wear track.