摘要
讨论了pH值、分散剂添加量、ZrO2(3Y)含量和固相体积分数对氧化锆增韧氧化铝(Zirconiatougheneda lumina,ZTA)陶瓷注凝成型浆料粘度的影响,研究了注凝成型的烧结样品的性能和显微结构。结果表明,当pH值为8 5、分散剂添加量为0 9%时,可以制备固相体积分数达55%的低粘度ZTA(20%ZrO2)悬浮体。高固相悬浮体制备的烧结试样具有结构致密、ZrO2分布较均匀和t ZrO2含量高等特征,其强度和断裂韧性分别达631 5MPa和7 64MPa·m1/2。
The effects of pH value, the amount of dispersant, ZrO2(3Y) content and solid volume fraction on viscosity of ZTA ceramic slurries were discussed. The mechanical properties and microstructure of sintered ZTA samples by gelcasting were investigated. The results show that low viscosity ZTA (20% ZrO2) suspension with 55% solid volume fraction is obtained at pH 8.5 and 0.9% dispersant. The sintered sample prepared with high solid volume fraction of the suspension has the advantages of compact structure, uniformity distribution of ZrO2 particles and higher content of t-ZrO2 phase. Its bending strength and fracture toughness are 631.5 MPa and 7.64 MPa·m1/2 under the test condition, respectively.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2004年第6期125-129,共5页
Acta Materiae Compositae Sinica
基金
江苏省高技术研究计划项目(BG2002025)
关键词
复相陶瓷
注凝成型
粘度
力学性能
显微结构
Mechanical properties
Microstructure
pH effects
Sintering
Viscosity
X ray diffraction
