期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 33, 期 3, 页码 521-529出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2012.10.007
关键词
Toughness and toughening; Residual stress; ZrO2; Al2O3; Nanocomposite
The t-m transformation zone and related residual stress fields around two types of crack used for toughness measurements, i.e. SEVNB (arrested crack induced by a V-notch) and IF methods (indentation crack induced by a Vickers impression), are reported for a Ce-TZP/Al2O3 nanocomposite, in comparison with 3Y-TZP. The fact that Ce-TZP/Al2O3 exhibits significant high toughness value on occasions when evaluated by the IF method was determined to be clearly linked to the presence of wide ranged three-dimensional transformation configuration and resulting substantial compressive residual stress fields. In contrast, for 3Y-TZP, transformation behaviors around the two types of crack were quite similar, which proves that 3Y-TZP shows near toughness values for both SEVNB and IF methods. (C) 2012 Elsevier Ltd. All rights reserved.
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