|Publisher DOI:||10.1016/j.ceramint.2018.04.107||Title:||R-curve behavior and flexural strength of zirconia-toughened alumina and partially stabilized zirconia composite laminates||Language:||English||Authors:||Blaese, Diego
|Issue Date:||15-Aug-2018||Source:||Ceramics International 12 (44): 13463-13468 (2018-08-15)||Journal or Series Name:||Ceramics international||Abstract (english):||A composite-laminate formed by thick layers ( 320 µm) of zirconia-toughened alumina (ZTA) with thin ( 50 µm) interlayers of zirconia partially stabilized (Y-PSZ) has been fabricated by tape casting and pressureless sintering. Fracture behavior and strength has been investigated and compared to a “monolithic” reference, e.g. a stack of zirconia-toughened alumina (ZTA) without interlayers. The fracture behavior has been analysed using stable crack growth in V-notched specimens loaded in 3-point bending. The ZTA+Y-PSZ composite laminate presented a rising crack resistance with maximum values between 6 and 14 MPa m1/2. In contrast, the “monolithic” ZTA laminate shows a plateau R-curve behavior at 2.7 MPa m1/2. Several toughening mechanisms were identified in the ZTA+Y-PSZ composite laminate, such as, crack arrest/slow down, micro cracking and bifurcation. These toughening mechanisms are most likely caused by high tensile residual stresses that were estimated theoretically.||URI:||http://hdl.handle.net/11420/2844||ISSN:||0272-8842||Institute:||Keramische Hochleistungswerkstoffe M-9||Type:||(wissenschaftlicher) Artikel|
|Appears in Collections:||Publications without fulltext|
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