Dent Mater:改变Al2O3形式可增强ZrO2-Al2O3牙科陶瓷复合材料的机械性能

2020-02-14 不详 网络

本研究评估了常用于牙科应用的ZrO2陶瓷的物理和机械性能的差异,该差异被三种不同形式的Al2O3含量;微粒(m),纳米微粒(n)和超细纤维(f)改变了。使用微粒(m),纳米微粒(n)或微纤维(f)形式的Al2O3形成了三种不同类型的ZrO2-Al2O3复合材料。评价了诸如烧结收缩率,相对密度,维氏硬度,断裂韧性和双轴强度的物理和机械性能。进行了威布尔分析,以评估样品的强度可靠性。所有数据均使用t检

本研究评估了常用于牙科应用的ZrO2陶瓷的物理和机械性能的差异,该差异被三种不同形式的Al2O3含量;微粒(m),纳米微粒(n)和超细纤维(f)改变了。

使用微粒(m),纳米微粒(n)或微纤维(f)形式的Al2O3形成了三种不同类型的ZrO2-Al2O3复合材料。评价了诸如烧结收缩率,相对密度,维氏硬度,断裂韧性和双轴强度的物理和机械性能。进行了威布尔分析,以评估样品的强度可靠性。所有数据均使用t检验和方差分析进行计算。

结果显示,添加Al2O3可以降低所有陶瓷复合材料的烧结收缩率和相对密度。ZrO2-Al2O3(f)复合材料的机械性能高于ZrO2-Al2O3(m)复合材料和ZrO2-Al2O3(n)复合材料。对于10体积%的Al2O3纤维,观察到最大硬度,断裂韧性和双轴弯曲强度。当基体中Al2O3纤维的含量增加到20vol%以上时,发生附聚并且导致硬度和韧性降低。与其他组相比,ZrO2-Al2O3(f)复合材料的威布尔模量值最低。但是,ZrO2- Al2O3(f)的特征强度(σ0)最高。

综上所述,该研究结果表明,向ZrO2基体中添加适量的Al2O3超细纤维可增强ZrO2-Al2O3(f)复合材料的机械性能,这将有利于牙科应用。

原始出处:

Seo JY, Oh D, et al., Enhanced mechanical properties of ZrO2-Al2O3 dental ceramic composites by altering Al2O3 form. Dent Mater. 2020 Feb 5. pii: S0109-5641(20)30014-2. doi: 10.1016/j.dental.2020.01.014.

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    2020-10-07 redcrab
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    2020-02-16 xzw115