摘要
目的 利用ZrO2 相变和微粉的纳米效应对氧化铝复合渗透陶瓷增强增韧 ,并对其化学组分、复合体的微观结构与复合体系力学特性的相互关系进行探讨。方法 制备氧化铝—氧化锆纳米复合渗透陶瓷 ,测试其抗弯强度和断裂韧性 ;采用X射线衍射分析测定其晶相组成 ;扫描电镜观察其显微结构。结果 氧化铝—氧化锆纳米复合渗透陶瓷三点弯曲强度测试的平均值高达 (6 1 0 85± 37 0 7)MPa,单边切口梁法测定断裂韧性的平均值高达(6 5 1± 1 38)MPa·m1 2 ,复合陶瓷的主晶相为α_Al2 O3及TZP_ZrO2 。结论 氧化铝—氧化锆纳米复合渗透陶瓷是一种力学性能优良的新型渗透陶瓷材料 。
Objective\ To evaluate the mechanical properties and microstructure of a new dental full_ceramic material: alumina_zirconia nano_composite infiltrated ceramic.Methods\ The flexural strength was tested with three_point bending method and the fracture toughness with single edge notch bend (SENB) method. The composition of crystal phases in the infiltrated ceramic was analyzed by X_ray diffraction (XRD). The microstructure of the infiltrated ceramic was examined by scanning electronic microscope (SEM). Results\ The average three_point flexural strength of the material was (610 85±37 07) MPa and the average fracture toughness determined by SENB method was (6 51±1 38) MPa·m\+\{1/2\}. The main crystal phases in this composite ceramic were α_Al\-2O\-3 and TZP_ZrO\-2.Conclusion\ Alumina_zirconia nano_composite infiltrated ceramic is a new infiltrated ceramic with favorable mechanical properties. It demonstrated a promising future for clinical application.\;
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2003年第3期238-240,共3页
West China Journal of Stomatology
基金
卫生部科学技术基金重点资助项目 (编号 99_369)
关键词
氧化铝
陶瓷力学性能
微观结构
断裂韧性
纳米复合陶瓷
zirconia transformation toughening
\ nano_composite ceramic
\ three_point flexural strength
\ fracture toughness
\ microstructure\
