摘要
采用液相沉淀法制备了ZrO_2/Al_2O_3纳米复合粉体,以自制的粉体为原料,无压烧结ZTA(ZrO_2 toughened Al_2O_3)复相陶瓷材料,并研究氧化锆添加量对其力学性能与微观结构的影响。结果表明,纳米粉体具有高的烧结活性,通过调整氧化锆的掺量,可控制陶瓷在烧结和受力过程中的物相变化,改善陶瓷的微观形貌,提高陶瓷的力学性能。ZrO_2体积含量为15%的ZTA陶瓷抗弯强度为650 MPa,断裂韧性为7.5 MPa·m^(1/2),硬度为19.0 GPa,综合性能最好。
The ultra fine zirconia/alumina powders were prepared by the liquid-phase precipitation method. Using the self-prepared powders, ZTA ceramics were fabricated. The dramatic influences of zirconia amounts on the properties of ZTA composites were analyzed. It is found that different zirconia amounts had different influence on the microstructure and the mechanical properties of ZTA. When the addition of zirconia was 15 vol.%, the bending strength and fracture toughness of ZTA could reach 650 MPa and 7.5 MPa · m^（1/2） respectively.
出处
《陶瓷学报》
CAS
北大核心
2016年第1期39-43,共5页
Journal of Ceramics
基金
山东省高等学校科技计划项目(J10LD59)
关键词
ZTA复相陶瓷
液相沉淀法
纳米粉体
相变增韧
ZTA ceramics
liquid-phase precipitation method
nanocomposites
mechanical properties
