Table of Contents
Ceramics, Volume 3, Issue 1 (March 2020) – 15 articles
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Cover Story (view full-size image) Two additions, multilayered graphene (MLG) and graphene oxide (GrO), were added to an Si3N4 ceramic [...] Read more. Two additions, multilayered graphene (MLG) and graphene oxide (GrO), were added to an Si3N4 ceramic matrix in various amounts, 5 and 30 wt%. The inﬂuence of the reinforcing phase on the ﬁnal properties of spark plasma sintered Si3N4 composite was studied. The Si3N4/graphene composites exhibited a lower friction coeﬃcient than reference. A four-time decrease was observed for 30 wt% graphene content, independent of graphene type (MLG, GrO). A 5 wt% amount of graphene was suﬃcient for the percolation eﬀect to take place. In this way, an increase in electrical conductivity could be achieved. In conclusion, uniaxial-pressure-assisted sintering such as SPS applied on MLG and GrO-added Si3N4 resulted in lower mechanical behavior, but better tribological and electrical properties. View this paper