Yttria Tetragonal Zirconia Biomaterials: Kinetic Investigation

被引：30

作者：

Elshazly, Ezzat S. ^{[1
,2
]}

El-Hout, S. M. ^{[2
]}

Ali, M. El-Sayed ^{[2
]}

机构：

[1] Virginia Commonwealth Univ, Dept Mech Engn, Richmond, VA 23284 USA

[2] Atom Energy Author, Nucl Res Ctr, Dept Met, Cairo, Egypt

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2011年 / 27卷 / 04期

关键词：

Low temperature degradation; 3Y-TZP; Kinetics; PARTIALLY-STABILIZED ZIRCONIA; Y-TZP; DENTAL CERAMICS; DEGRADATION; MICROSTRUCTURE; TRANSFORMATION; PHASE; ENVIRONMENT; NUCLEATION; BEHAVIOR;

D O I：

10.1016/S1005-0302(11)60070-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low temperature aging behavior of polycrystalline tetragonal zirconia was investigated to explore the effects on phase transformation occurring during the process. XRD analysis was conducted for the phase identification and the tetragonal to monoclinic phase transformation was determined. The aging of tetragonal zirconia polycrystals doped with 3 mol% Y2O3 triggers tetragonal to monoclinic phase transformation on the surface of the specimen only, while the penetration inside the bulk of the specimen is very limited. A slight decrease in the mechanical properties was also observed after aging for 40 h. The transformation kinetics show a nucleation and growth mechanism on the specimen surface to be dominant in the low temperature aging in water environment.

引用

页码：332 / 337

页数：6

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