Processing of Homogeneous Zirconia‐Toughened Alumina Ceramics with High Dry‐Sliding Wear Resistance

Kerkwijk, Bas; Winnubst, Louis; Mulder, Elmer J.; Verweij, H.

doi:10.1111/j.1151-2916.1999.tb02045.x

Cited by 59 publications

(35 citation statements)

References 27 publications

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“…However, in ZTA monolithic composites the latent possibility of transformation of the zirconia phase, possibility that continues to be extremely dependent on environmental conditions and on microstructural features determined by the manufacturing processes, is not prevented [2,10,13], even though significant microstructural advances to limit ageing have been achieved [2].…”

Section: Introductionmentioning

confidence: 98%

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Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Bueno

Ferrari

Melandri

et al. 2010

Ceramics International

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Section: Introductionmentioning

confidence: 98%

“…In particular, zirconia-toughened alumina (ZTA) materials with low zirconia contents as second phase (<15 vol.%) show higher fracture toughness than the alumina single phase while maintaining the high hardness [2,[10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Bueno

Ferrari

Melandri

et al. 2010

Ceramics International

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“…In particular, zirconia-toughened alumina (ZTA) with low zirconia content as second phase (<15 vol%) shows higher fracture toughness and hardness than alumina and YTZP, respectively [2,[10][11][12][13][14]. However, YTZP as second phase in ZTA composites is under tension [14], so it is still liable to ageing in contact with wet environments [2,10,13], although significant resistance to ageing may be achieved [2]. Another design strategy, for improving the surface hardness of YTZP materials while avoiding the problem related to phase transformation, is to produce laminated structures designed to induce compressive residual stresses at the surface by combining ceramics with different thermal expansion coefficients.…”

Section: Introductionmentioning

confidence: 99%

Processing, nanoindentation and scratch testing of alumina-coated YTZP

Valle

Anglada

Ferrari

et al. 2015

Boletín de la Sociedad Española de Cerámica y Vidrio

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Available online xxxKeywords: Alumina YTZP Coatings Nanoindentation Scratch a b s t r a c t In this work, alumina-coated YTZP materials are proposed as means to combine the mechanical reliability of YTZP with the stiffness and hardness of alumina. Additionally, compressive stresses are developed in the alumina coating when cooling from the sintering temperature due to the thermal expansion mismatch between alumina and YTZP. The proposed processing method involves dipping of pre-sintered YTZP specimens in stable alumina suspensions and co-sintering of the dipped specimens. The influence of the processing parameters on the macro and microstructure of the materials has been established. Berkovich indentation has been performed to determine the Young's modulus of the substrates and coatings. The structural integrity of the coatings has been analysed using scratch tests. The Young's modulus. The optimised specimens present high resistance to scratch up to loads of 150 N. © 2015 Published by Elsevier España, S.L.U. on behalf of SECV. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Procesamiento y nano indentación y pruebas de nanoscratch de materiales YTZP recubiertos de alúmina Palabras clave:Alúmina YTZP Recubrimientos Nanoindentación Rayado r e s u m e n En este trabajo, se proponen los materiales YTZP recubiertos de alúmina como instrumento para combinar la fiabilidad mecánica de YTZP, con la rigidez y la dureza de alúmina. Adicionalmente, con este diseño, el material cerámico se ve reforzado por las tensiones residuales de compresión que aparecen en el recubrimiento de alúmina durante el enfriamiento desde la temperatura de sinterización, debido a la diferencia en coeficientes de expansión térmica entre la alúmina y la YTZP.El método de procesamiento propuesto implica la inmersión de muestras de YTZP presinterizadas, con un 42% de porosidad abierta, en suspensiones de alúmina estables, y la posterior co-sinterización de los materiales recubiertos.En este trabajo se ha establecido la influencia de los parámetros de procesamiento en la macro y microestructura de los materiales. Así mismo, se ha determinado el módulo de

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“…[1][2][3][4][5] One possible explanation for this remarkable improvement is the prevention of grain growth. In most cases, a finer grain size of alumina leads to lower specific wear rates.…”

mentioning

confidence: 99%

Alumina/Zirconia Micro/Nanocomposites: A New Material for Biomedical Applications With Superior Sliding Wear Resistance

Bartolomé

Aza

Martı́n

et al. 2007

Journal of the American Ceramic Society

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In the present investigation, the sliding wear behavior is described for Al 2 O 3 /ZrO 2 micro/nanocomposites and monolithic alumina of similar grain size under defined conditions of a constant sliding speed and different loads (20-150 N). Nano ZrO 2 particles (1.7 vol%) were observed uniformly distributing throughout the composites, and most of them were located within the matrix alumina grains. The wear rate of the alumina and the micro/nanocomposites increased as the contact load increased and a clear transition in friction and wear behavior was observed in both materials. However, the nanocomposite wear resistance at low contact loads was one order of magnitude higher than that of the alumina. In the severe regime, no difference was observed among the materials. The low wear rate (10 À7 mm 3 . (N . m) À1) along with low pullout indicates higher wear resistance of micro/nanocomposites in the mild regime compared with monolithic alumina. Based on the morphological observation of worn surfaces by scanning electron microscope and on residual stress analysis performed by neutron diffraction, some wear mechanisms of Al 2 O 3 -ZrO 2 micro/nanocomposites are proposed. The high wear resistance of the nanocomposites is discussed in terms of fracture resistance properties and residual stress. Improvements in mechanical and tribological properties of these composites make them promising candidates for biomedical applications.

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Processing of Homogeneous Zirconia‐Toughened Alumina Ceramics with High Dry‐Sliding Wear Resistance

Cited by 59 publications

References 27 publications

Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Processing, nanoindentation and scratch testing of alumina-coated YTZP

Alumina/Zirconia Micro/Nanocomposites: A New Material for Biomedical Applications With Superior Sliding Wear Resistance

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