人工晶体学报2012，Vol.41Issue(1)：152-157,164,7.
注凝成型制备氧化锆增韧氧化铝陶瓷
Fabrication of ZrO2 Toughened Al2O3 Ceramic through Gelcasting Process
摘要
Abstract
ZTA(Zirconia toughened alumina)composite ceramics were prepared using a low-toxicity monomer N,N-dimethyl acrylamide(DMAA) ,mass ratio of Al2O3 to ZrO2 is 3:1 ,the solid loading of suspension is 50 vol%. The effect of dehydration mode on the dehydration rate and property of green body were discussed. The effect of different polymerize temperature to the strength of green bodies were investigated. The result show that the green bodies dried in moist heat oven had the highest strength and the polymerize temperature should be hold on about 65℃. The properties of ZTA ceramics sintered with green bodies of different DMAA content had been compared, and the best DMAA content was 10wt%. By contrasting the mechanical properties of sintered bodies made by gelcasting and dry pressing, the bending strength and fracture toughness of the ceramics made by gelcasting increased about 42.2% and 23.5% than dry pressing, reaching 640 Mpa and 6. 3 Mpa · M1/2, respectively. SEM images show that ceramics made by gelcasting have more uniform microstructure than dry pressing.关键词
DMAA/ZTA/干燥方式/成型温度/抗弯强度/断裂韧性Key words
DMAA/ZTA/dehydration mode/polymerize temperature/bending strength/fracture toughness分类
矿业与冶金引用本文复制引用
张超,丘泰,杨建,郭坚..注凝成型制备氧化锆增韧氧化铝陶瓷[J].人工晶体学报,2012,41(1):152-157,164,7.基金项目
江苏高校优势学科建设工程资助项目 （）
