▎ 摘　　要

NOVELTY - The method for preparing high-toughness composite nano-ceramic material involves (a) depositing a zirconium oxide layer on the surface of the nano-graphene sheet to obtain a modified nano-graphene sheet, (b) mixing the modified nano-gloss, zirConia fiber, boron nitride fiber, and boride powder, then adding polyvinyl alcohol and deionized water milling to prepare a mixture, (c) freezing and drying the mixture to obtain particulate matter, and then pressing the particulate matter to obtain a ceramic blank body, and (d) using the discharge plasma sintering technology to obtain the high-strength composite nano-ceramic material. USE - Method Preparation of high-toughness composite nano-ceramic material used in various structural components. Uses include but are not limited to structural components i.e. electrical components, electronic components, mechanical components, and optical components. ADVANTAGE - The method provides high-toughness composite nano-ceramic material with enhanced oxidation resistance, and reduced sintering temperature, prevents graphene carbonization, and improves the toughness of the ceramic, layered structure combined with the phase change toughening mechanism of zirconium oxide and high toughness graphene of characteristics to obtain high toughness composite nano-ceramic material. The method enables to the preparation of ceramic green by dry pressing process, the graphene has very high toughness, and the surface is coated by nano-zirconia, enhancing the oxidation resistance. The discharge plasma sintering process reduces the sintering temperature, preventing graphene, at the same time, optimizing the discharge plasma process to improve the density of ceramic, and further improve the toughness of ceramic.