摘要
用低温燃烧合成的陶瓷粉体为原料,在1450℃下烧结制备了多孔Al2O3/ZrO2(3mol%Y2O3)陶瓷,并研究ZrO2的外加量(0mol%、10mol%、15mol%和20mol%)对多孔陶瓷显气孔率、抗弯强度、孔径分布和显微结构的影响。实验结果表明:与其他试样相比,ZrO2外加量为15mol%的试样的显气孔率和抗弯强度都明显提高,其最可几孔径约为1.1μm。SEM和EBSD图片显示:外加ZrO2能显著影响多孔陶瓷的显微结构,其中外加15mol%ZrO2的多孔陶瓷中,氧化铝晶粒的平均尺寸较小,颈部较厚,这是其具有较高抗弯强度的主要原因。
Porous Al2O3/ZrO2（3mol% Y2O3） ceramics were sintered at 1450 ℃ using low-temperature combustion synthesized ceramics powders as starting materials. Effects of ZrO2addition（0mol%,10mol%,15mol% and 20mol%） on open porosity, flexural strength, pore size distribution and microstructures of the porous ceramics were investigated. The experimental results show that the specimen with addition of 15mol% ZrO2 has significantly higher open porosity and flexural strength than other specimens,and the peaks of its pore size distribution is at about 1. 1 μm. SEM and EBSD micrographs reveal that the microstructures of porous ceramics are remarkably influenced by the ZrO2 addition. The porous ceramics with addition of 15mol% ZrO2 exhibit much smaller average size of Al2O3 grains and markedly thicker bonding neck than other specimens,which are believed to be mainly responsible for its higher flexural strength.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2014年第7期1734-1738,共5页
Journal of Synthetic Crystals
基金
山东省自然科学基金(ZR2010EL007)
