▎ 摘　　要

NOVELTY - Nanotungsten oxide, cobalt oxide, vanadium oxide and graphene and/or carbon nanotube are mixed, and ball-milled. The obtained powder is dried, dried material is cold-pressed into blank, blank is placed in furnace, argon gas is passed into the furnace, and carbonization reaction is carried out to obtain nanotungsten carbide-cobalt-vanadium carbide powder. The nanotungsten carbide-cobalt-vanadium carbide powder is subjected to solid-phase sintering under high pressure, heated, and cooled to obtain high-performance nanocrystalline carbide block material. USE - Preparation of high-performance nanocrystalline carbide block material (claimed). ADVANTAGE - The method provides high-performance nanocrystalline carbide block material having high density, uniform particle size distribution, and excellent mechanical characteristics. DETAILED DESCRIPTION - Nanotungsten oxide, cobalt oxide, vanadium oxide and graphene and/or carbon nanotube as raw material are mixed, and ball-milled for 50-150 hours at a speed of 400-600 rpm using deionized water as milling medium. The obtained powder is placed in oven and dried. The dried material is cold-pressed into blank, blank is placed in furnace, argon gas is passed into the furnace, carbonization reaction is carried out at 850-1000 degrees C at a speed of 10-20 degrees C/minute, and heat-preserved for 1-3 hours to obtain nanotungsten carbide-cobalt-vanadium carbide powder. The nanotungsten carbide-cobalt-vanadium carbide powder is subjected to solid-phase sintering under high pressure of 5-20 GPa, heated at 800-850 degrees C for 10-20 minutes, reheated at 1000-1150 degrees C for 3-8 minutes, and cooled to room temperature at a speed of 5-10 degrees C/minute to obtain high-performance nanocrystalline carbide block material. The ratio of ball and material is 5:1-15:1.