Synthesis of High-purity Fe2AlB2 and the Effect as Sintering Additive for ZrB2

• 作 者: WANG Rui XU Wen-Tao QIN Zi-Xuan LING Jun-Rong ZHOU You-Fu
• 机 构: Fujian Normal University,College of Chemistry and Materials Science,Fuzhou 350007,China;Key Laborato
• 出 处: 结构化学
• 发表日期: 2021年3期
• 关键词: MAB phase ternary layered structure high purity ZrB2

Fe2AlB2 powder material was prepared by the direct reaction of iron,aluminum and boron powders in a tubular fumace.The effects of different Al contents,temperature and raw material pretreatment on the purity of product were studied.The mixed powder with the stoichiometric ratio of 1.5Al/2Fe/2B was processed by CIP (Cold Isostatic Pressing),and then calcined at 1150 ℃ for 120 min.The product containing a small amount of impurities is treated with alkaline solution to obtain high-purity Fe2AlB2 powder.ZrB2-Fe2AlB2 composite ceramic was successfully prepared at 1250 ℃ by hot pressing sintering.The density,hardness and fracture toughness were 96.2％,22 ± 0.3 GPa and 5.78 ± 0.5 MPa·m1/2,respectively.