摘要
本研究采用溶胶凝胶法制备出钇稳定四方氧化锆(3Y-TZP)纳米粉,分析了粉体相组成随热处理温度的变化;并将该纳米粉和同组分微米粉冷等静压成型,1300℃烧结后得到纳微米复合ZrO2陶瓷。单边切口梁法测试了材料的断裂韧性,讨论了其与陶瓷断裂方式、粒径、物相组成及致密度的关系。结果表明,同组分纳米粉的添加,不影响材料的物相组成,但会导致材料断裂方式的改变以及粒径和致密度的变化,从而使复合陶瓷的断裂韧性随氧化锆纳米粉含量的增加先升后降。
In the paper, yttria stabilized zirconia （3Y-TZP） nanopowder was prepared by sol-gel method, and the phase character of the powder was analyzed with the change of heat treatment temperature. The prepared nano-size particles were mixed with the micro-size 3Y- TZP materials and shaped by cold isostatic pressing, then sintered at 1300℃ to form ZrO2 ceramic nanocomposites. Fracture toughness was tested by SENB method. Relationship between fracture mode, grain size, and phase character, densification and fracture toughness was discussed. Results show that the addition of same component nanopowder could not affect the phase character, but resulted in the change of fracture mode, grain size, phase character and densification, thus fracture toughness first increased then decreased with the addition increase of nano-size powder.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2006年第1期13-16,共4页
Journal of Materials Science and Engineering
基金
哈尔滨市科技攻关资助项目(2003AA5CG023)
