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

华西口腔医学杂志

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

陈永平,岑远坤,廖运茂

610041 口腔生物医学工程教育部重点实验室|口腔生物医学工程教育部重点实验室

收稿日期:2003-06-25 修回日期:2003-06-25 出版日期:2003-06-20 发布日期:2003-06-20
基金资助:
卫生部科学技术基金重点资助项目 (编号 99-369)

A Study on the Mechanical Properties and Microstructure of Alumina-zirconia Nano-composite Infiltrated Ceramic

CHEN Yongping, CEN Yuankun, LIAO Yunmao

Key Lab. for Oral Biomedical Engineering Ministry of Education, West China College of Stomatology, Sichuan University,Chengdu 610041, China

Received:2003-06-25 Revised:2003-06-25 Online:2003-06-20 Published:2003-06-20

摘要/Abstract

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。

关键词: 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

Abstract: 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.

Key words: zirconia transformation toughening, nano-composite ceramic, three-point flexural strength, fracture toughness, microstructur

陈永平,岑远坤,廖运茂. 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[J]. 华西口腔医学杂志.

CHEN Yongping, CEN Yuankun, LIAO Yunmao. A Study on the Mechanical Properties and Microstructure of Alumina-zirconia Nano-composite Infiltrated Ceramic[J]. West China Journal of Stomatology.

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