氧化铝—氧化锆纳米复合渗透陶瓷力学性能与微观结构的研究
A Study on the Mechanical Properties and Microstructure of Alumina-zirconia Nano-composite Infiltrated Ceramic
作者：陈永平,岑远坤,廖运茂
Author：CHEN Yongping, CEN Yuankun, LIAO Yunmao
收稿日期：2003-06-25 年卷（期）页码：2003,21(03):238-
期刊名称：华西口腔医学杂志
Journal Name：West China Journal of Stomatology
关键字：氧化锆相变增韧,纳米复合陶瓷,三点弯曲强度,断裂韧性,微观结构,
Key words：zirconia transformation toughening,nano-composite ceramic,three-point flexural strength,fracture toughness,microstructur,
基金项目：
卫生部科学技术基金重点资助项目 (编号 99-369)
中文摘要
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 ,展示出良好的临床应用前景。
英文摘要
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.
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