A new approach for the Young's modulus-porosity correlation of ceramic materials

Boccaccını, Aldo R.; Fan, Z.

doi:10.1016/s0272-8842(96)00033-8

Cited by 106 publications

(58 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Con este objetivo, se fabricaron en el marco de la presente investigaci-n, materiales porosos. El efecto de la porosidad en reducir el m-dulo el ‡stico de materiales cer ‡micos est ‡ bien documentado en la literatura (16,17). La estructura porosa obtenida en los presentes materiales, utilizando 4 vol% de H 2 O 2 , se muestra en la Figura 8.…”

Section: Resultados Y Discusiînunclassified

Preparación y propiedades de materiales cerámicos bioinertes en el sistema Al2O3-TiO2-SiO2

Milosevski¹,

Milosevska²,

Spaseska³

et al. 1998

Bol. Soc. Esp. Ceram. Vidr.

View full text Add to dashboard Cite

Se han obtenido polvos cer ‡micos muy finos (100-600 nm) y de alta sinterabilidad, en el sistema Al 2 O 3 -TiO 2 -SiO 2 , por el mŽto-do de co-hidr-lisis controlada a partir de precursores organo-met ‡licos. Los compactos fabricados a partir del polvo de cohidr-lisis calcinado fueron sinterizados en el rango de temperaturas 1320-1380 ¡C, obteniŽndose densidades elevadas (~ 92% D.T.). El coeficiente de expansi-n tŽrmica tŽcnico del material cer ‡mico sinterizado fue medido por dilatometr'a. El valor obtenido, 8.8 10 -6 ¡C -1 , es muy similar al de titanio met ‡lico y por lo tanto el material cer ‡mico Al 2 O 3 -TiO 2 -SiO 2 puede ser candidato para la fabricaci-n de implantes compuestos cer ‡mico/metal. Las propiedades mec ‡nicas: m-dulo de elasticidad, resitencia a la flexi-n y resistencia a la compresi-n, del material denso sinterizado, fueron determinadas, resultando muy superiores a las de TiO 2 puro. Se obtuvieron materiales cer ‡micos de alta porosidad (P~ 65 %) por el mŽtodo de evaporaci-n de per-xido de hidr-geno. Estos materiales exhibieron porosidad interconectada y sus propiedades mec ‡nicas, en particular el m-dulo de Young, resultaron similares a las de material -seo, como se requiere para el dise-o de implantes quiroergicos. Palabras clave: biocer ‡micos, aloemina-titania-silica, co-hidr-lisis, resistencia mec ‡nica, porosidad Proccessing and properties of bioinert ceramic materials in the system Al 2 O 3 -TiO 2 -SiO 2Very fine and sinterable ceramic powders (100-600 nm) in the system Al 2 O 3 -TiO 2 -SiO 2 were obtained by the method of cohydrolisis from organo-metallic precursors. Isostatically pressed powder compacts could be densified to a relative high density (~ 92 % th. density) at relative low temperatures (1320-1380¡C). The technical coefficient of thermal expansion was measured by dilatometry. The value obtained (8.8 10 -6 1/¡C) corresponds closely to that of Ti, opening the possibility to use Al 2 O 3 -TiO 2 -SiO 2 ceramics to fabricate metal/ceramic composite implants. The measured mechanical properties of dense sintered Al 2 O 3 -TiO 2 -SiO 2 material: YoungÕs modulus, flexure strength and compression strength, are higher than those of pure TiO 2 . Highly porous Al 2 O 3 -TiO 2 -SiO 2 ceramics (P~ 65%) were obtained by the method of evaporation of hydrogen peroxide. These materials exhibited interconnected porosity and their properties, particularly the YoungÕs modulus, resulted very similar to those of bone, which is an important pre-requisite for the design of quirurgical implants. Keywords: bioceramics, alumina-titania-silica, co-hydrolysis, mechanical resistance, porosity INTRODUCCIîNMateriales biocer ‡micos son aquellos materiales cer ‡micos espec'ficamente dise-ados para ser usados en la fabricaci-n de implantes quiroegicos, pr-tesis y -rganos artificiales y para cumplir una determinada funci-n fisiol-gica en el cuerpo humano (1). De acuerdo a su actividad qu'mica en el entorno del organismo humano, los materiales biocer ‡micos se clasifican en tres grupos, que incluyen : I) mater...

show abstract

Section: Resultados Y Discusiînunclassified

Preparación y propiedades de materiales cerámicos bioinertes en el sistema Al2O3-TiO2-SiO2

Milosevski¹,

Milosevska²,

Spaseska³

et al. 1998

Bol. Soc. Esp. Ceram. Vidr.

View full text Add to dashboard Cite

show abstract

“…Very small pores were observed with SEM-FEG. However, an image analysis shows that the porosity does not exceed 2%, suggesting a limited impact on mechanical properties [3]. Concerning physicochemical properties, EDX analysis on FIB cross sections and SIMS analysis, performed on a circular membrane, have shown diffusion of atoms from the removed Cu seed layer through the film thickness.…”

Section: Geometrical and Physicochemical Characterizationmentioning

confidence: 99%

Inﬂuence of microstructure and internal stress on the mechanical behavior of electroplated gold freestanding thin ﬁlms

Martegoutte

Seguineau²,

Fourcade

et al. 2010

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. Mechanical properties of freestanding electroplated gold thin films were studied in relationship to their geometrical and microstructural properties. Three different techniques of characterization were used: nanoindentation, bulge tests and microtensile tests. Results were compared to literature and also discussed according to physical phenomena related to the elaboration process of the specimens like seed layer exodiffusion or internal stress state. The observed plasticity and failure mechanisms were found to be in good agreement with the literature and are consistent with the microstructure. The measured Young's modulus is slightly higher than expected, and SIMS analysis is exploited to explain such a high value.

show abstract

“…In many composites with high volume filler fractions (x), porosity becomes an issue that is not encountered as frequently in the pure phase constituents. The influence of porosity with its pore shape orientation, distribution, homogeneity and contiguity have all been raised as factors that affect the modulus [2] of either the matrix or the filler and, consequently, the composite.…”

Section: Common To the Compositementioning

confidence: 99%

PREDICTIVE AND BOUNDARY MODULUS MODELS FOR COMPOSITES WITH GREATER THAN ONE Ef/Em RATIOS

Chantler

Boyd

1999

Journal of the Society of Materials Science, Japan

View full text Add to dashboard Cite

The authors have proposed a simple model that predicts dental composites' (small glass particle composites) elastic moduli very well. The fit of this model to other small particle composite materials is demonstrated in this paper to be the best of the current models. With volume filler fractions varying from 0 to 1, and Ef/Em ratios from 670,000 to approximately 1.7, this paper compares results from the literature to the various models. The models analysed are, iso-strain, iso-stress, Hashin-Shtrikman's upper and lower, Ravichandran's upper and lower, Kerner's, Einstein's, Chantler's and the law of mixtures for particulate composites equations. The results show that the models that best predict the experimental data are Chantler's models. These models provide a guide to the expected modules for a two-phase reinforced particulate composite. At the extremes lie the Hashin-Shtrikman upper and lower boundaries which will include nearly all generated data but provide poor predictability.

show abstract

A new approach for the Young's modulus-porosity correlation of ceramic materials

Cited by 106 publications

References 30 publications

Preparación y propiedades de materiales cerámicos bioinertes en el sistema Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>-SiO<sub>2</sub>

Preparación y propiedades de materiales cerámicos bioinertes en el sistema Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>-SiO<sub>2</sub>

Inﬂuence of microstructure and internal stress on the mechanical behavior of electroplated gold freestanding thin ﬁlms

PREDICTIVE AND BOUNDARY MODULUS MODELS FOR COMPOSITES WITH GREATER THAN ONE Ef/Em RATIOS

Contact Info

Product

Resources

About