Elastic modulus of porous Ce-TZP ceramics

Lima, L.F.C.P.; Godoy, Ana Lúcia Exner; Muccillo, E.N.S.

doi:10.1016/s0167-577x(03)00439-7

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Some of these test methods have been standardized, such as in ASTM C1198‐09, which is based on the use of the sonic resonance technique. Dynamic techniques often involve high strain rates and small displacement amplitudes and in effect measure the Young's modulus at low loads . In contrast, quasi‐static experiments are often performed up to specimen failure, and the material properties are obtained at relatively large strains.…”

Section: Introductionmentioning

confidence: 99%

The Uniaxial Tensile Response of Porous and Microcracked Ceramic Materials

et al. 2013

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The uniaxial tensile stress-strain behavior of three porous ceramic materials was determined at ambient conditions. Test specimens in the form of thin beams were obtained from the walls of diesel particulate filter honeycombs and tested using a microtesting system. A digital image correlation technique was used to obtain full-field 2D in-plane surface displacement maps during tensile loading, and in turn, the 2D strains obtained from displacement fields were used to determine the Secant modulus, Young's modulus, and initial Poisson's ratio of the three porous ceramic materials. Successive unloading-reloading experiments were performed at different levels of stress to decouple the linear elastic, anelastic, and inelastic response in these materials. It was found that the stress-strain response of these materials was nonlinear and that the degree of nonlinearity is related to the initial microcrack density and evolution of damage in the material.

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Section: Introductionmentioning

confidence: 99%

The Uniaxial Tensile Response of Porous and Microcracked Ceramic Materials

et al. 2013

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“…Tensile moduli of the formed ceramic nanocomposites have been assessed in a three‐point bending mode using DMA in accordance with previous work . According to elastic theory, the maximum deflection of a beam (Δ) assessed in three‐point bending mode is given by

Δ = \frac{P L^{3}}{4 Eb h^{3}} + \frac{3 PL}{10 Gbh}

where P , E , and G are the force loading, Young's and shear modulus, respectively .…”

Section: Resultsmentioning

confidence: 75%

Fast Sol–Gel Preparation of Silicon Carbide–Silicon Oxycarbide Nanocomposites

et al. 2011

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Silicon carbide nanofiber dispersion within a silicon oxycarbide glassy ceramic was achieved through a combination of a fast sol-gel procedure for in situ ceramic matrix synthesis and nanofiber conversion from sacrificial multiwalled carbon nanotube templates. Nanotubes were dispersed using both surfactant adsorption and a covalent sidewall modification scheme with gel-grafting capabilities. The combination of high temperature processing and silicon monoxide precursor concentrations allowed substantial carbothermal reduction of the nanotube templates, yielding silicon carbide nanofibers. The resulting nanocomposites were examined for density, Vickers microhardness, Young's modulus, and fracture toughness. The surfactantassisted route inhibited ceramic densification, offering virtually no mechanical property enhancement. In contrast, the covalently functionalized nanotube templates at 0.8 wt% loading enhanced tensile modulus of 77% while simultaneously maintaining both Vickers microhardness and fracture toughness. These results indicate strong interfacial adhesion between the nanofiber surface and host matrix despite the abrupt chemical changes experienced during the high temperature processing.As the annealing process of the sol-gel-derived precursor categorically evolves gaseous silicon monoxide intermediate, M. Cinibulk-contributing editor

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“…27 Additionally, linear reduction in flexural strength and fracture toughness values was previously proven to be directly related to the percentage of structural defects and pores present in a homogenous single-phase test material. 28 On the other hand, Ce-TZP-Al is a multi-phase material where flexural strength was inversely affected by the presence of structural defects; nevertheless, its structural complexity and material properties resulted in increasing its fracture toughness, as a propagating crack would have to pass through the different phases of the material and to travel in a tortuous path following the different sizes of the grains, all of which result in hindering crack growth and in dissipation of its energy.…”

Section: Discussionmentioning

confidence: 99%