R-curve behavior and flexural strength of zirconia-toughened alumina and partially stabilized zirconia composite laminates

Diego Blaese, Tobias Benitez, Marcelo Barros, Hans Jelitto, Nahum Travitzky, Dachamir Hotza, Rolf Janssen

Результат исследований: Материалы для журналаСтатья

3 Цитирования (Scopus)

Выдержка

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.

Язык оригиналаАнглийский
Страницы (с-по)13463-13468
Число страниц6
ЖурналCeramics International
Том44
Номер выпуска12
DOI
СостояниеОпубликовано - 15 авг 2018
Опубликовано для внешнего пользованияДа

Отпечаток

Aluminum Oxide
Zirconia
Bending strength
Laminates
Alumina
Composite materials
Toughening
Cracks
Tensile stress
Tapes
zirconium oxide
Crack propagation
Residual stresses
Casting
Sintering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Цитировать

R-curve behavior and flexural strength of zirconia-toughened alumina and partially stabilized zirconia composite laminates. / Blaese, Diego; Benitez, Tobias; Barros, Marcelo; Jelitto, Hans; Travitzky, Nahum; Hotza, Dachamir; Janssen, Rolf.

В: Ceramics International, Том 44, № 12, 15.08.2018, стр. 13463-13468.

Результат исследований: Материалы для журналаСтатья

Blaese, Diego ; Benitez, Tobias ; Barros, Marcelo ; Jelitto, Hans ; Travitzky, Nahum ; Hotza, Dachamir ; Janssen, Rolf. / R-curve behavior and flexural strength of zirconia-toughened alumina and partially stabilized zirconia composite laminates. В: Ceramics International. 2018 ; Том 44, № 12. стр. 13463-13468.
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AU - Hotza, Dachamir

AU - Janssen, Rolf

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