Assessment of mechanical properties by nano- and microindentation of alumina/zirconia composites

A comparative study between alumina added niobia ceramics and two alumina zirconia composites from nanostructured TZP (7% and 14% weight) was made. On this composites the zirconia were yttria stabilized and the alumina were submicron structured. As sintering aid a mixture of magnesia, niobia and talc were used on all samples. The sintering was performed at 1450 oC during 60 minutes. The characteristic grain size and shape of an alumina and zirconia powders, aggregates and agglomerates were characterized. The sintering ceramics were evaluated through hardness, fracture toughness and 4 point bending test. Weibull statistic was applied on the flexural results. Although the fracture toughness result from ZTA were lower, and seems to be affected by the liquid fase, the hardness and Weibull modulus were higher than alumina niobia. The grains size and the homogeneity of its distributions on the microstructure of this ceramics was correlated to these higher values. The results from these alumina zirconia composites showed a potential to apply as a ballistic armor material.

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Mechanical properties and phase-transformation behavior of carbon nanotube-reinforced yttria-stabilized zirconia composites

Ceramics International ◽

10.1016/j.ceramint.2021.09.071 ◽

2021 ◽

Author(s):

Byung-Koog Jang ◽

Ji-Hwoan Lee ◽

Craig A.J. Fisher

Keyword(s):

Mechanical Properties ◽

Phase Transformation ◽

Carbon Nanotube ◽

Yttria Stabilized Zirconia ◽

Transformation Behavior ◽

Stabilized Zirconia ◽

Phase Transformation Behavior ◽

Zirconia Composites

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Influence of powder drying route on the mechanical properties of alumina-zirconia composites

Journal of the European Ceramic Society ◽

10.1016/0955-2219(93)90030-u ◽

1993 ◽

Vol 11 (4) ◽

pp. 309-313 ◽

Cited By ~ 3

Author(s):

J. Mullot ◽

J.P. Lecompte ◽

L. Montanaro ◽

A. Negro

Keyword(s):

Mechanical Properties ◽

Zirconia Composites

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Fabrication and Mechanical Properties of Bone-like Tricalcium Phosphate and Zirconia Composites

Interceram - International Ceramic Review ◽

10.1007/bf03401150 ◽

2016 ◽

Vol 65 (1-2) ◽

pp. 25-31

Author(s):

Hanan H. Beherei ◽

Khaled R. Mohamed

Keyword(s):

Mechanical Properties ◽

Tricalcium Phosphate ◽

Zirconia Composites

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Microstructure and Mechanical Properties of Multiscale Zirconia Ceramics Prepared by Field Assisted Sintering Technique

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.697.354 ◽

2016 ◽

Vol 697 ◽

pp. 354-359

Author(s):

Khalid Eltayeb ◽

Dong Qin Jin ◽

Young Hwan Han ◽

Fei Chen ◽

Qiang Shen ◽

...

Keyword(s):

Mechanical Properties ◽

Flexural Strength ◽

Yttria Stabilized Zirconia ◽

Milling Machine ◽

Stabilized Zirconia ◽

Zirconia Ceramics ◽

Dense Structure ◽

Zirconia Composites ◽

20 Nm ◽

Field Assisted Sintering

Two kinds of powders of 3 mol. % yttria stabilized zirconia (3Y–TZP) with different particles sizes; one was 20 nm denoted by N whereas the other was 0.5 µm denoted by M, were mechanically mixed via ball milling machine using different amounts of N wt. % to obtain multiscale zirconia composite powder. Then the mixed powders were sintered by field assisted sintering technique (FAST). The effect of N content on the microstructure as well as on mechanical properties of zirconia is investigated. Results show that the microstructure of M completely surrounded by N emerged in zirconia composites, and tetragonal phase is presented in all the sintered samples. The obtained zirconia ceramics with 15 wt. % N own a highly dense structure (~ 99.9 % relative density) and high flexural strength of 813.59 MPa wherein a 15 % increase in flexural strength compared to zirconia ceramics without adding N, but the fracture toughness of the composites just lightly decreases. The improved flexural strength of the composites is caused by the multiscale effect.

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Mechanical properties of alumina/zirconia composites

Ceramics International ◽

10.1016/j.ceramint.2019.09.068 ◽

2020 ◽

Vol 46 (1) ◽

pp. 1033-1039 ◽

Cited By ~ 5

Author(s):

Marek Boniecki ◽

Tomasz Sadowski ◽

Przemysław Gołębiewski ◽

Helena Węglarz ◽

Anna Piątkowska ◽

...

Keyword(s):

Mechanical Properties ◽

Zirconia Composites

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Effect of MgF2 Additive on the Mechanical Properties in Hydroxyapatite / Zirconia Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.510-511.478 ◽

2006 ◽

Vol 510-511 ◽

pp. 478-481 ◽

Cited By ~ 2

Author(s):

Sung Hwan Kim ◽

Hyun Chan Lee ◽

Hee Gon Bang ◽

Sang Yeup Park

Keyword(s):

Crystal Structure ◽

Mechanical Properties ◽

Flexural Strength ◽

Vickers Hardness ◽

Tricalcium Phosphate ◽

Decomposition Temperature ◽

Phase Decomposition ◽

Zirconia Composites ◽

Ion Substitution

In this study, the effect of MgF2 additive on the mechanical properties of hydroxyapatite (HAp)/zirconia composites was investigated. As a fluoride additive, MgF2 was added to HAp/zirconia composites for the suppression of phase decomposition from HAp to tricalcium phosphate (TCP). Due to the dissolution of MgF2 at the phase decomposition temperature of HAp, the phase decomposition of non-stoichiometric HAp was suppressed. When MgF2 (5, 10 vol%) was added to HAp/zirconia composites, the decomposition of HAp was completely suppressed below 1400oC due to the ion substitution F- of for OH- in the HAp crystal structure. The flexural strength and Vickers hardness of composites was revealed more higher values compared with the MgF2-free composites.

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