Rationally designed ultra-short pulsed laser patterning of zirconia-based ceramics tailored for the bone-implant interface

Ceramic composite materials are increasingly used in dental restoration procedures, but current ceramic surface designs do not yet achieve the osseointegration potential of state-of-the-art titanium implants. Rapid bone tissue integration of an implant is greatly dependent on its surface characteristics, but the material properties of ceramic composite materials interfere with classical surface modification techniques. Here, ultra-short pulsed laser machining, which offers a defined energy input mitigating a heat-affected zone, is explored for surface modification of ceramic composites. Inspired by surface textures of clinically relevant titanium implants, dual roughness surfaces are laser patterned. Raman mapping reveals a negligible effect of ultra-short pulsed laser ablation on material properties, but a laser-induced change in the wetting state is revealed by static contact angle measurements. Laser patterning of surfaces also influences blood coagulation, but not the attachment and spreading of osteoblastic cells. The presented laser machining approach thus allows the introduction of a rational surface design on ceramic composites, holding great promise for the manufacturing of ceramic implants.

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Multiscale Modelling of Gradual Degradation in Al2O3/ZrO2 Ceramic Composites under Tension

Materials Science Forum ◽

10.4028/www.scientific.net/msf.638-642.2743 ◽

2010 ◽

Vol 638-642 ◽

pp. 2743-2748

Author(s):

Tomasz Sadowski ◽

Liviu Marsavina

Keyword(s):

Material Properties ◽

Ceramic Composite ◽

Ceramic Composites ◽

Multiscale Approach ◽

Solid Modelling ◽

Induced Anisotropy ◽

Two Phase ◽

State Of Stress ◽

Ceramic Composite Materials ◽

As Stress

Two-phase ceramic composite materials, (CMC, e.g. Al2O3/ZrO2), have a non-linear and complex overall response to applied loads due to: different phases, existence of an inital porosity, development of limited plasticity and internal microdefects. All microdefects act as stress concentrators and locally change the state of stress, leading to the development of mesocracks and finally macrocracks. Experimental results show that defects develop mainly inter-granular and cause inhomogeneity and induced anisotropy of the solid. Modelling of such material response is possible by multiscale approach describing different phenomena occuring at different scales: micro- meso- and macro- ones. The paper presents uniaxial tension process of the Al2O3/ZrO2 composite with the gradual degradation of the material properties due to different defects development.

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In Situ Synthesis of Rod-Like Tielite / Alumina Ceramic Composites via Mechanical Activation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.352.111 ◽

2007 ◽

Vol 352 ◽

pp. 111-114

Author(s):

Xiao Hu Chen ◽

Xiao Min Chen ◽

Huang Zhao ◽

Ji Huai Wu

Keyword(s):

Composite Materials ◽

Mechanical Activation ◽

Ceramic Composite ◽

Ceramic Composites ◽

Al2o3 Ceramic ◽

Longitudinal Length ◽

In Situ Formation ◽

Ceramic Composite Materials ◽

Α Al2o3

The purpose of this paper is to investigate the possibility of rod-like Al2TiO5 / α-Al2O3 composites in situ formation via a mechanical activation process. A QM-ISP-4 Planetary Mill was employed to activate mechanically the mixtures of anatase and corundum in air at room temperature for different times. The milled powder mixtures were pressed into platelets and then sintered in air at 1300°C for 3 h. The XRD results showed that only Al2TiO5 and α-Al2O3 phases could be detected in the sintered samples when the activated time reached 30 hours. The SEM observations illustrated the unusual microstructure of Al2TiO5 / α-Al2O3 ceramic composite materials. Abnormal grains with longitudinal length ~10 μm23 transversal length ~1 μm and equiaxed matrix grains of ~3 μm on an average were observed. EDXA proved that the rod-like grains and the fine equiaxed matrix grains were composed of Al2TiO5 and α-Al2O3, separately. The roles of anisotropic grain growth caused by mechanical activation are discussed for the in situ formation of rod-like Al2TiO5 / α-Al2O3 ceramic composite materials.

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ASME Code Rules and ASTM Standards Integration for Ceramic Composite Core Materials and Components1

Journal of Physics Conference Series ◽

10.1088/1742-6596/2048/1/012020 ◽

2021 ◽

Vol 2048 (1) ◽

pp. 012020

Author(s):

J W Geringer ◽

Y Katoh ◽

S Gonczy ◽

T Burchell ◽

M Mitchell ◽

...

Keyword(s):

Composite Materials ◽

Ceramic Composite ◽

Ceramic Matrix Composites ◽

Ceramic Composites ◽

Test Methods ◽

Code Design ◽

Matrix Composites ◽

Asme Code ◽

Ceramic Composite Materials ◽

American Society

Abstract Fiber-reinforced ceramic matrix composites have many desirable properties for high-temperature nuclear applications, including excellent thermal and mechanical properties and reasonable to outstanding radiation resistance. Over the last 20 years, the use of ceramic composite materials has already expanded in many commercial nonnuclear industries as fabrication and application technologies mature. The new ASME design and construction rules under Section III, Subsection HH, Subpart B lay out the requirements and criteria for materials, design, machining and installation, inspection, examination, testing, and the marking procedure for ceramic composite core components, which is similar to the established graphite code under Section III, Subsection HH, Subpart A. Moreover, the general requirements listed in Section III, Subsection HA, Subpart B are also expanded to include ceramic composite materials. The code rules rely heavily on the development and publication of standards for composite specification, classification, and testing of mechanical, thermal, and other properties. These test methods are developed in the American Society for Testing and Materials Committee C28 on Advanced Ceramics with a current focus on ceramic composite tubes. Details of the composites code, design methodology, and similarities to the graphite code, as well as guidance for the development of specifications for ceramic composites for nuclear application and recent standard developments, are discussed. The next step is to “close the gap” to support licensing aspects by validating the code with benchmarking data.

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Life Prediction Based on Material State Changes in Ceramic Matrix Composite Materials

Volume 1: Turbo Expo 2007 ◽

10.1115/gt2007-28167 ◽

2007 ◽

Cited By ~ 1

Author(s):

Ken Reifsnider ◽

S. W. Case

Keyword(s):

High Temperature ◽

Composite Materials ◽

Gas Turbines ◽

Ceramic Composite ◽

Ceramic Matrix Composite ◽

Ceramic Composites ◽

Stress Strain ◽

Material State ◽

State Changes ◽

Ceramic Composite Materials

Monolithic ceramics and continuous fiber reinforced ceramic composites are being developed for use in high temperature applications such as combustor liners in gas turbines, thrust deflectors for jet engines, and thruster nozzles. Ceramic composite materials possess the high temperature resistance properties of ceramics, but have better creep and cyclic properties. However, the properties of these materials change somewhat with time at service temperatures, i.e., their material state changes as a function of service conditions and history. The authors have developed a methodology for representing and combining the effects of high temperature material state changes in CMCs, along with changes in applied stress / strain conditions during service, to estimate remaining strength and life of ceramic composite materials and components. Fatigue, creep rupture, and time dependent deformation are combined by a strength metric in integral form to create a time-resolved, point-wise estimate of current remaining strength and life in material elements. Application of this methodology in discrete element representations of mechanical behavior of structural elements with nonuniform stress / strain states has been implemented.

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Analysis of the embedded cell method in 1D for the numerical homogenization of metal-ceramic composite materials

Journal of Applied Analysis ◽

10.1515/jaa-2018-0007 ◽

2018 ◽

Vol 24 (1) ◽

pp. 71-80

Author(s):

Wolf-Patrick Düll ◽

Bastian Hilder ◽

Guido Schneider

Keyword(s):

Composite Materials ◽

Material Properties ◽

Ceramic Composite ◽

Iteration Scheme ◽

Homogenization Theory ◽

Numerical Homogenization ◽

One Dimensional ◽

Cell Method ◽

Metal Ceramic ◽

Ceramic Composite Materials

Abstract In this paper, we analyze the embedding cell method, an algorithm which has been developed for the numerical homogenization of metal-ceramic composite materials. We show the convergence of the iteration scheme of this algorithm and the coincidence of the material properties predicted by the limit with the effective material properties provided by the analytical homogenization theory in two situations, namely for a one-dimensional linear elasticity model and a simple one-dimensional plasticity model.

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Investigation of CeTi2O6- and CaZrTi2O7-containing glass–ceramic composite materials

Canadian Journal of Chemistry ◽

10.1139/cjc-2016-0633 ◽

2017 ◽

Vol 95 (11) ◽

pp. 1110-1121 ◽

Cited By ~ 8

Author(s):

Elham Paknahad ◽

Andrew P. Grosvenor

Keyword(s):

Composite Materials ◽

Glass Ceramic ◽

Local Structure ◽

Glass Matrix ◽

Ceramic Composite ◽

Ceramic Composites ◽

X Ray ◽

Synthesis Conditions ◽

Ceramic Composite Materials ◽

Glass Ceramic Composite

Glass–ceramic composite materials are being investigated for numerous applications (i.e., textile, energy storage, nuclear waste immobilization applications, etc.) due to the chemical durability and flexibility of these materials. Borosilicate and Fe–Al–borosilicate glass–ceramic composites containing brannerite (CeTi2O6) or zirconolite (CaZrTi2O7) crystallites were synthesized at different annealing temperatures. The objective of this study was to understand the interaction of brannerite or zirconolite-type crystallites within the glass matrix and to investigate how the local structure of these composite materials changed with changing synthesis conditions. Powder X-ray diffraction (XRD) and Backscattered electron (BSE) microprobe images have been used to study how the ceramic crystallites dispersed in the glass matrix. X-ray absorption near edge spectroscopy (XANES) spectra were also collected from all glass–ceramic composite materials. Examination of Ti K-, Ce L3-, Zr K-, Si L2,3-, Fe K-, and Al L2,3-edge XANES spectra from the glass–ceramic composites have shown that the annealing temperature, glass composition, and the loading of the ceramic crystallites in the glass matrix can affect the local environment of the glass–ceramic composite materials. A comparison of the glass–ceramic composites containing brannerite or zirconolite crystallites has shown that similar changes in the long range and local structure of these composite materials occur when the synthesis conditions to form these materials or the composition are changed.

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A study of the electronic structure and structural stability of Gd2Ti2O7 based glass-ceramic composites

RSC Advances ◽

10.1039/c5ra10720b ◽

2015 ◽

Vol 5 (99) ◽

pp. 80939-80949 ◽

Cited By ~ 10

Author(s):

Esther Rani Aluri ◽

Andrew P. Grosvenor

Keyword(s):

Electronic Structure ◽

Composite Materials ◽

Radioactive Waste ◽

Structural Stability ◽

Nuclear Waste ◽

Glass Ceramic ◽

Ceramic Composite ◽

Ceramic Composites ◽

Ceramic Composite Materials ◽

Glass Ceramic Composite

Glass-ceramic composite materials have been investigated for nuclear waste sequestration applications due to their ability to incorporate large amounts of radioactive waste elements.

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Investigation of Failure Mechanisms in Ceramic Composites as Potential Railway Brake Disc Materials

Materials ◽

10.3390/ma13225141 ◽

2020 ◽

Vol 13 (22) ◽

pp. 5141

Author(s):

Jeongguk Kim

Keyword(s):

Composite Material ◽

Composite Materials ◽

Ceramic Composite ◽

Failure Mechanisms ◽

Ceramic Matrix Composites ◽

Tensile Tests ◽

Ceramic Composites ◽

Matrix Composites ◽

Fracture Characteristics ◽

Ceramic Composite Materials

Ceramic composite materials have been efficiently used for high-temperature structural applications with improved toughness by complementing the shortcomings of monolithic ceramics. In this study, the fracture characteristics and fracture mechanisms of ceramic composite materials were studied. The ceramic composite material used in this study is Nicalon ceramic fiber reinforced ceramic matrix composites. The tensile failure behavior of two types of ceramic composites with different microstructures, namely, plain-weave and cross-ply composites, was studied. Tensile tests were performed on two types of ceramic composite material specimens. Microstructure analysis using SEM was performed to find out the relationship between tensile fracture characteristics and microstructure. It was found that there was a difference in the fracture mechanism according to the characteristics of each microstructure. In this study, the results of tensile tests, failure modes, failure characteristics, and failure mechanisms were analyzed in detail for two fabric structures, namely, plain-weave and cross-ply structures, which are representative of ceramic matrix composites. In order to help understanding of the fracture process and mechanism, the fracture initiation, crack propagation, and fracture mechanism of each composite material are schematically expressed in a two-dimensional figure. Through these results, it is intended to provide useful information for the design of ceramic composite materials based on the mechanistic understanding of the fracture process of ceramic composite materials.

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