▎ 摘　　要

NOVELTY - Preparing graphene oxide toughened alumina-based ceramic cutting tool involves adding 0.3-1 pts. wt. graphene oxide to absolute ethanol, and adding polyethylene glycol after mechanical stirring for 10-15 minutes, and mechanical stirring for 15-20 minutes. The 60-75 pts. wt. alumina powder is added, and after ultrasonic vibration and mechanical stirred for 30-40 minute to obtain powder slurry I. The anhydrous ethanol is mixed with polyethylene glycol while performing ultrasonic vibration and mechanical stirring. The 10-16 pts. wt. beta-silicon carbide nanoparticles and 13-18 pts. wt. titanium carbide whiskers. The ultrasonic vibration and mechanical stirring are performed for 40-60 minutes at the same time. The 0.7-1.3 pts. wt. sintering aid are added and after performing ultrasonic vibration and mechanical stirring for 20-30 minutes at the same time to obtain powder slurry II. The powder slurry I is put in a ball mill under a nitrogen atmosphere, after ball milling for 60-70 hours. USE - Method for preparing graphene oxide toughened alumina-based ceramic cutting tool. ADVANTAGE - The method enables to prepare graphene oxide toughened alumina-based ceramic cutting tool that has synergistic effect of graphene, good effect of reinforcing and toughening, excellent mechanical properties, high toughness and strength, and wear resistance, and high dispersibility. DETAILED DESCRIPTION - Preparing graphene oxide toughened alumina-based ceramic cutting tool involves adding 0.3-1 pts. wt. graphene oxide to absolute ethanol, and adding polyethylene glycol after mechanical stirring for 10-15 minutes, and mechanical stirring for 15-20 minutes. The 60-75 pts. wt. alumina powder is added, and after ultrasonic vibration and mechanical stirred for 30-40 minute to obtain powder slurry I. The anhydrous ethanol is mixed with polyethylene glycol while performing ultrasonic vibration and mechanical stirring. The 10-16 pts. wt. beta-silicon carbide nanoparticles and 13-18 pts. wt. titanium carbide whiskers. The ultrasonic vibration and mechanical stirring are performed for 40-60 minutes at the same time. The 0.7-1.3 pts. wt. sintering aid are added and after performing ultrasonic vibration and mechanical stirring for 20-30 minutes at the same time to obtain powder slurry II. The powder slurry I is put in a ball mill under a nitrogen atmosphere, after ball milling for 60-70 hours, powder slurry II is added, and continued ball milling under nitrogen atmosphere for 9-12 hours to obtain a composite slurry. The compound slurry is placed after ball milling in a drying box, and passed through a 200 mesh sieve after drying to obtain a uniformly mixed compound powder, and pre-compacted the composite powder. The vacuum hot press sintering of the pre-pressed green body is performed, firstly increased the temperature to 1050-1180 degrees Cat a rate of 100-120 degrees /min and insulated for 10-15 minutes, then increased the temperature at 16-20 degrees C/minute to 1680-1730 degrees C and insulated for 20-25 minute and pressed the pressure 52-60 mega pascal. The furnace is cooled to 750-780 degrees C, the temperature is reduced to 240-260 degrees C by air cooling, and then placed in a furnace of 240-260 degrees C and cooled to room temperature with the furnace to obtain the ceramic tool.