Division of Advanced Materials Engineering, The Research Center of Hydrogen Fuel Cell, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.
Materials Architecturing Research Center, Korea Institute of Science and Technology, Cheongryang, Seoul 130-650, Republic of Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):4011-4015. doi: 10.1166/jnn.2021.19243.
A dense nanostructured 2HfB₂-SiC composite was simultaneously synthesized and consolidated by the pulsed current activated sintering method in one step within very short time (two minutes) from mechanically activated 2Hf, B₄C and Si powders. Simultaneous combustion synthesis and consolidation were achieved through the combination of the effects of the pulsed current and mechanical pressure. A highly dense 2HfB₂-SiC composite with 97.5% relative density was achieved under the simultaneous application of a pressure of 80 MPa and the pulsed current. The fracture toughness of the 2HfB₂-SiC composite was higher than that of monolithic HfB₂.
通过在极短时间（两分钟内）内从机械激活的 2Hf、B4C 和 Si 粉末一步法，采用脉冲电流激活烧结法同时合成和固结了致密的纳米结构 2HfB2-SiC 复合材料。通过脉冲电流和机械压力的综合作用实现了燃烧合成和固结。在 80 MPa 的压力和脉冲电流的共同作用下，获得了相对密度为 97.5%的致密 2HfB2-SiC 复合材料。2HfB2-SiC 复合材料的断裂韧性高于单相 HfB2。
