Effect of alumina content on the mechanical properties of alumina-toughened calcia-stabilized tetragonal zirconia ceramic made of baddeleyite

被引：0
|
作者：
Vyacheslav V. Rodaev
Svetlana S. Razlivalova
机构：
[1] Derzhavin Tambov State University,Institute for Nanotechnology and Nanomaterials
来源：
Applied Physics A | 2023年 / 129卷
关键词：
Zirconia ceramic; Baddeleyite; Alumina; High-energy milling; Phase composition; Mechanical properties;
D O I：
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中图分类号：
学科分类号：
摘要：
Alumina-toughened calcia-stabilized tetragonal zirconia ceramics are produced using baddeleyite as raw material. A 3 wt.% CaO-ZrO2/Al2O3 ceramic containing 15 wt.% Al2O3 is characterized by sufficiently high mechanical properties: a hardness of 12.6 GPa, Young’s modulus of 248 GPa and fracture toughness of 10.3 MPa⋅m0.5. The hardness and Young’s modulus of this ceramic exceed those of alumina-free 3 wt.% CaO-ZrO2 ceramic by about 8.6% and 9.3%, respectively. However, fracture toughness of the prepared composite ceramic is lower than that of 3 wt.% CaO-ZrO2 ceramic by about 13.7%. It is revealed that in the fabricated 3 wt.% CaO-ZrO2/Al2O3 ceramic in the range of used Al2O3 concentrations transformation toughening prevails over residual stress toughening and crack deflection toughening.
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