• 专利标题:   Nanopowder modified silicon carbide-boron carbide complex phase ceramic used in armor protection application, comprises silicon-carbide powder and boron carbide powder, carbon powder, zirconium oxide powder, and nanographene powder.
  • 专利号:   CN114591086-A, CN114591086-B
  • 发明人:   LUAN C, GUO M, TONG H, QU J, YIN F, LI G, GAO X, ZHANG W, YANG S, SUN M
  • 专利权人:   CHINA NORTH IND NO 52 RES INST CO LTD
  • 国际专利分类:   C04B035/563, C04B035/565, C04B035/622
  • 专利详细信息:   CN114591086-A 07 Jun 2022 C04B-035/565 202273 Chinese
  • 申请详细信息:   CN114591086-A CN10336523 31 Mar 2022
  • 优先权号:   CN10336523

▎ 摘  要

NOVELTY - A nanopowder modified silicon carbide-boron carbide complex phase ceramic comprises 90-98 wt.% silicon carbide powder and boron carbide powder, 1-5 wt.% carbon powder, 1-5 wt.% zirconium oxide powder, and 1-5 wt.% nanographene powder. The mass ratio of silicon carbide powder to boron carbide powder is 1:4-4:1. The silicon carbide powder comprises 5-20 wt.% nano-silicon carbide powder and micro-silicon carbide powder. The boron carbide powder comprises 5-20 wt.% nano-boron carbide powder and micro-boron carbide powder. USE - The nanopowder modified silicon carbide-boron carbide complex phase ceramic is useful in armor protection application e.g. helicopter protection, human body protection and armored vehicle protection applications. ADVANTAGE - The nanopowder modified silicon carbide-boron carbide complex phase ceramic has improved hardness, strength and uniformity, low sintering temperature, and high preparation efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the nanopowder modified silicon carbide-boron carbide complex phase ceramic, which involves mixing nano-silicon carbide powder, nano-boron carbide powder, carbon powder, nano-graphene powder, deionized water, and dispersant by ball milling to obtain a pre-slurry, adding zirconia powder, micro-silicon carbide powder and micro-boron carbide powder to the pre-slurry, mixing, adding an organic binder, mixing by ball milling to obtain ceramic slurry, spray granulating the ceramic slurry under controlled spray pressure, air inlet temperature and air outlet temperature to prepare granulated powder, pressure forming the granulated powder to obtain a ceramic green component, pre-sintering the ceramic green component in a high-temperature vacuum/atmosphere sintering furnace, cooling to 500-900°C, rapidly heating the ceramic green component at 500-900°C for a certain period of time, and cooling to room temperature.