

Publisher: John Wiley & Sons Inc
E-ISSN: 1527-2648|17|5|716-722
ISSN: 1438-1656
Source: ADVANCED ENGINEERING MATERIALS (ELECTRONIC), Vol.17, Iss.5, 2015-05, pp. : 716-722
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
AbstractThis paper reports a study on sintering and characterization of graphene platelet (GPL)‐reinforced ceramic composites. Alumina (Al2O3) and zirconia (ZrO2) toughened Al2O3 (ZTA) composites reinforced with GPLs are fabricated, respectively, using spark plasma sintering. The microstructures and mechanical properties of the sintered samples are investigated. It is found that the addition of GPLs hinders the growth of the ceramic matrix grains and help form homogenous microstructures of the ceramic matrices. Agglomeration of GPLs occurs during the fabrication process and formation of GPL aggregates is impeded when ceramic powders of smaller particle size and a shorter milling process are used. Fracture toughness of the ceramic matrices is significantly improved by introducing GPLs. Approximately, a 26.4% and a 29% improvements in fracture toughness are achieved for GPL/Al2O3 and GPL/ZTA composites, respectively. The main toughening mechanisms induced by GPLs are pull‐out and crack bridging.
Related content




Harder and Denser AlN-TiB2 Ceramic Composites Processed by Spark Plasma Sintering
Materials Science Forum, Vol. 2016, Iss. 869, 2016-10 ,pp. :




Advancement of Tooling for Spark Plasma Sintering
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol. 98, Iss. 11, 2015-11 ,pp. :


Development of TiB2 Dispersed Aluminum Composites by Spark Plasma Sintering
Materials Science Forum, Vol. 2016, Iss. 877, 2017-01 ,pp. :