Damage-resistant SrO-doped Ce-TZP/Al2O3 composites

被引：0
|
作者：
Cutler, R.A. [1 ]
Lindemann, J.M. [1 ]
Ulvensoen, J.H. [1 ]
Lange, H.I. [1 ]
机构：
[1] Ceramatec, Inc, Salt Lake City, United States
来源：
Materials and Design | 1994年 / 15卷 / 03期
关键词：
Addition reactions - Alumina - Ceramic materials - Grinding (machining) - Low temperature effects - Micromachining - Microstructure - Powders - Residual stresses - Strength of materials - Strontium compounds;
D O I：
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中图分类号：
学科分类号：
摘要：
Simultaneous additions of SrO and Al2O3 to ZrO2 (12 mol.% CeO2) lead to the in-situ formation of SrO&middot6Al2O3 platelets in the Al2O3/Ce-TZP matrix. These composites have superior damage resistance compared to Al2O3/Y-TZP ceramics despite their lower strength. The increased damage resistance appears to be primarily related to the higher residual stress as a result of grinding with smaller contributions due to micromechanical toughening. High damage resistance was also obtained by introduction of temperature-induced surface compressive stresses in layered composites. Damage resistance is only obtained at low temperatures (< 500°C). The applicability of conventional powder processing (slip casting or spray drying) to these tailored microstructures is demonstrated.
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页码：123 / 133
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