The aging effect on the low temperature mechanical strength of 3.2YSZ single crystals manufactured by the Skull melting method
The aging effect on the low temperature mechanical strength of 3.2YSZ single crystals manufactured by the Skull melting method
复制标题
时效对Skull熔炼法制造的3.2YSZ单晶低温力学强度的影响
DOI：
10.1016/j.ceramint.2012.08.055
复制
发表时间：
2013
影响因子：
5.2
通讯作者：
Jaehyung Lee
中科院分区：
文献类型：
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作者：
Joon;Y. Heo;Jeong;Jae;H. Lee;Jaehyung Lee
用Skull熔融法制备了含3.2mol%Y_2O_3的ZrO_2单晶。单晶体由t′-ZrO 2相组成。为了比较机械强度，还制备了3摩尔%的添加Y2 O3的四氧化锆多晶（3 Y-TZP）（Tosoh TZ-3 Y ®）样品。单晶陶瓷和3 Y-TZP陶瓷的双轴弯曲强度分别为1328± 537 MPa和1227± 312 MPa。在200°C热压处理24 h后，单晶和多晶陶瓷的强度分别为1345± 251 MPa和281± 31 MPa。该结果表明，t’-ZrO 2单晶具有优异的耐湿增强机械降解性。由于四方相（t）和单斜相（m）的马氏体相变在晶格之间具有晶体学对应性，因此该关系将导致t-m界面处的低界面能和t相和m相之间的高结合能。与多晶3 Y-TZP不同，t '-ZrO 2单晶保持了晶体学关系，部分共格性似乎延缓了单晶的低温退化-单斜相拉出或裂纹产生。
Single crystals of ZrO2containing 3.2mol% of Y2O3were manufactured by the Skull melting method. The single crystals were composed of the t′-ZrO2phase. For a comparison of the mechanical strength, 3mol% of Y2O3added tetragonal zirconia polycrystal (3Y-TZP) (Tosoh TZ-3Y®) samples were also prepared. The biaxial flexure strengths of the single crystal and 3Y-TZP ceramics were 1328±537MPa and 1227±312MPa, respectively. After autoclave treatment at 200°C for 24h, the strength of the single crystals and polycrystalline ceramics changed to 1345±251MPa and 281±31MPa, respectively. This result shows that the t′-ZrO2single crystals have excellent resistance in moisture-enhanced mechanical degradation. Since the martensitic transformation of the tetragonal (t) and monoclinic (m) has crystallographic correspondences between the lattices, the relationship will lead to low interface energy at the t–m interface and high binding energy between the t and m phases. As far as the crystallographic relationship is maintained in the t′-ZrO2single crystals, different from polycrystalline 3Y-TZP, the partial coherency seems to retard low temperature degradation – monoclinic phase pull out or crack generation – of single crystals.
YTZ-单晶的高温塑性各向异性
DOI：
--
发表时间：
2002
期刊：
Journal of the European Ceramic Society 22
影响因子：
--
作者：
A Munos;D.Gomez-Garcia;A.Dominguez-Rodriguez;F.Wakai
通讯作者：
F.Wakai