期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 29, 期 3, 页码 333-340出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2010.12.008
关键词
Zirconia; Alumina; Whisker; Characteristic strength; Fracture toughness; Weibull modulus
资金
- Consejo Nacional de Ciencia y Tecnologia (CONACyT)
The aim of this investigation was to study the variability in compressive strength, fracture toughness and microhardness applying the well-known Weibull statistics and to be able to provide a wide spectrum of mechanical properties in Al2O3 whisker reinforced alumina toughened zirconia (ATZ) and zirconia toughened alumina (ZTA) nanocomposites for possible dental applications. Uniaxial compression tests at room temperature of samples 6.35 +/- 0.03 mm in diameter and 12.50 +/- 0.63 mm in length and Vickers hardness measurements on polished surfaces were carried out. The indentation fracture toughness (K-IC) was derived from the average crack length. Weibull analysis was performed on the data. The ATZ2 (18.0 wt.% Al2O3 + 2.0 wt.%((w)) + 80.0 wt.% ZrO2 (TZ-3Y)) nanocomposite reported the highest average compressive load of 1200 MPa, the highest value of characteristic strength, sigma(o) of 1340 MPa with Weibull modulus of 3.25 and relatively high fracture toughness (4.7 +/- 0.7 MPa m(1/2)), suggesting that with the wide range of mechanical properties obtained in our work, different dental applications could be offered without lead to premature failure. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据