纳米ZrO2对Al-Si复合Al2O3-C材料性能、组成和结构的影响-《郑州大学学报(工学版)》

文章信息/Info

Title:: Effects of nano-ZrO2 powder addition on properties, phase composition and microstructure of Al-Si incorporated Al2O3-C materials

Author(s):: LIU Zhi-fang ; LIU Xin-hong; HUANG Ya-lei; MA Teng; Henan Key Laboratory of High ’Temperature Functional Ceramics ，Zhengzhou University , Zhengzhou 450052 ,China

Keywords:: Al-Si incorporated Al203-C composite; nano-ZrO2 powder; thermo-mechanical property; phasecomposition; microstructure

摘要:: 以板状刚玉骨料和细粉、Al粉、Si粉、石墨和纳米ZrO2粉为原料,以酚醛树脂为结合剂,研究了纳米Zr02粉对Al-Si复合Al203-C材料性能、组成和结构的影响.结果表明:引入纳米ZrO2粉对试样的常温和高温强度影响不大,但有利于提高试样的成型致密度和抗氧化性,可明显提高试样的抗热震性.试样致密度提高的原因在于纳米氧化钴具有良好的填充作用和助烧结作用.纳米ZrO2可促进Al、Si 反应生成更多非氧化物晶须,并在试样中形成交叉连锁的网络结构,以及纳米粉的增韧和ZrO2的相变增韧均有利于提高试样的抗热震性.

Abstract:: The effects of nano-ZR02 powder on the properties, composition and structure of Al-Si composite Al203-C were studied by using plate corundum aggregate and fine powder, Al powder, Si powder, graphite and nano-Zro2 powder as raw materials and phenolic resin as binder.The results show that the introduction of nano-ZRO2 powder has little effect on the strength of the sample at room temperature and high temperature, but it is beneficial to improve the molding density and oxidation resistance of the sample, and can significantly improve the thermal shock resistance of the sample.The reason for the increase of sample density is that the nano-cobalt oxide has a good filling effect and helps sintering.Nano-zro2 can promote the reaction of Al and Si to generate more non-oxide whiskers, and form a cross-linked network structure in the sample, and the toughening of nano-powder and the phase transition toughening of ZrO2 are conducive to improving the thermal shock resistance of the sample.

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