A two-scale Weibull approach to the failure of porous ceramic structures made by robocasting: Possibilities and limits

Genet, Martin; Houmard, Manuel; Eslava, Salvador; Saiz, Eduardo; Tomsia, Antoni P.

doi:10.1016/j.jeurceramsoc.2012.11.001

Cited by 32 publications

(24 citation statements)

References 35 publications

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“…We also observed dramatic improvements in the compressive strength of the 3D porous scaffold made from this composite, when compared to the literature, even with high porosities (40%‐60%) (Figure ). Values obtained for these samples are well above those reported so far in the literature . Therefore, such metal‐like behavior and defect‐tolerant properties of the investigated ZA 8 Sr 8 Ce 11 material appear to be an excellent option for additive manufacturing technologies.…”

Section: Potential Applications Of Ductile Ceramics: Case Study On Imsupporting

confidence: 79%

“…Higher strength was obtained with the scaffold with a rim and the scaffold without rim had lower compressive strength. Comparison with literature values of porous ceramics made from additive manufacturing and freeze casting techniques is reported for comparison . TCP stands for TriCalciumPhosphate, DLM for dianhydro‐D‐glucitol [bis(dilactoylmethacrylate), TTCP for TetraCalciumPosphate, 3DP for 3D printing, HA for hydroxyapatite, CaP for CalciumPhosphate, SLS for selective laser sintering and SLA for stereolithography…”

Section: Potential Applications Of Ductile Ceramics: Case Study On Immentioning

confidence: 99%

“…Comparison with literature values of porous ceramics made from additive manufacturing and freeze casting techniques is reported for comparison. [126][127][128][129][130][131][132][133][134][135]…”

Section: F I G U R E 1mentioning

confidence: 99%

“…Values obtained for these samples are well above those reported so far in the literature. [126][127][128][129][130][131][132][133][134][135] Therefore, such metal-like behavior and defect-tolerant properties of the investigated ZA 8 Sr 8 Ce 11 material appear to be an excellent option for additive manufacturing technologies. These preliminary results will be complemented by further analysis of defect size -strength relations in this system, as well as a comparison with Y-TZP processed under the same conditions, in an upcoming paper.…”

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confidence: 99%

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Forty years after the promise of «ceramic steel?»: Zirconia‐based composites with a metal‐like mechanical behavior

et al. 2019

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Forty years ago, Garvie and his Australian co‐workers reported that the stress‐induced transformation of metastable tetragonal zirconia grains to the monoclinic symmetry could give rise to a powerful toughening mechanism. Their results even led them to consider zirconia systems as analogues of certain steels. This seminal paper generated extraordinary excitement in the ceramic community and it is still the subject of extensive research. Transformation toughening is widely used in zirconia materials and results in an increase in strength and toughness when compared to nontransformable ceramics, but the implementation into strong, tough, and sufficiently stable materials has not been fully reached. Zirconia ceramics generally fail at low strains with a much larger scatter in the strength values than metals and require statistical approaches to failure. Here we describe in detail the mechanical behavior laws of ceria‐doped zirconia composites exhibiting a high degree of stress‐induced transformation. They present, to some extent, mechanical behavior analogous to a metal, displaying, (a) significant amount of transformation‐induced plasticity without damage, (b) very high flaw tolerance and (c) almost no dispersion in strength data. They potentially open new application avenues in situations where the advantages of ceramics were dampened by their brittle failure behavior. In particular, the consequences of such behavior for dental implants and additive‐manufactured structures are highlighted.

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Section: Potential Applications Of Ductile Ceramics: Case Study On Imsupporting

confidence: 79%

Section: Potential Applications Of Ductile Ceramics: Case Study On Immentioning

confidence: 99%

Section: F I G U R E 1mentioning

confidence: 99%

mentioning

confidence: 99%

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Forty years after the promise of «ceramic steel?»: Zirconia‐based composites with a metal‐like mechanical behavior

et al. 2019

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“…Genet et al. modeled the compressive strength of hydroxyapatite porous scaffolds based on a Weibull approach . They could fit well‐experimental data showing a decrease in compressive strength upon increasing rod spacing (i.e., porosity), keeping a constant rod diameter.…”

Section: Am Technologies For Ceramicsmentioning

confidence: 99%

Additive Manufacturing of Ceramics: Issues, Potentialities, and Opportunities

et al. 2015

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Additive manufacturing (AM) is a technology which has the potential not only to change the way of conventional industrial manufacturing processes, adding material instead of subtracting, but also to create entirely new production and business strategies. Since about three decades, AM technologies have been used to fabricate prototypes or models mostly from polymeric or metallic materials. Recently, products have been introduced into the market that cannot be produced in another way than additively. Ceramic materials are, however, not easy to process by AM technologies, as their processing requirements (in terms of feedstock and/or sintering) are very challenging. On the other hand, it can be expected that AM technologies, once successful, will have an extraordinary impact on the industrial production of ceramic components and, moreover, will open for ceramics new uses and new markets.

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Toward Strong and Tough Glass and Ceramic Scaffolds for Bone Repair

Saiz

Rahaman

et al. 2013

Adv Funct Materials

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208

142

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The need for implants to repair large bone defects is driving the development of porous synthetic scaffolds with the requisite mechanical strength and toughness in vivo. Recent developments in the use of design principles and novel fabrication technologies are paving the way to create synthetic scaffolds with promising potential for reconstituting bone in load-bearing sites. This article reviews the state of the art in the design and fabrication of bioactive glass and ceramic scaffolds that have improved mechanical properties for structural bone repair. Scaffolds with anisotropic and periodic structures can be prepared with compressive strengths comparable to human cortical bone (100–150 MPa), while scaffolds with an isotropic structure typically have strengths in the range of trabecular bone (2–12 MPa). However, the mechanical response of bioactive glass and ceramic scaffolds in multiple loading modes such as flexure and torsion — as well as their mechanical reliability, fracture toughness, and fatigue resistance — has received little attention. Inspired by the designs of natural materials such as cortical bone and nacre, glass-ceramic and inorganic/polymer composite scaffolds created with extrinsic toughening mechanisms are showing potential for both high strength and mechanical reliability. Future research should include improved designs that provide strong scaffolds with microstructures conducive to bone ingrowth, and evaluation of these scaffolds in large animal models for eventual translation into clinical applications.

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A two-scale Weibull approach to the failure of porous ceramic structures made by robocasting: Possibilities and limits

Cited by 32 publications

References 35 publications

Forty years after the promise of «ceramic steel?»: Zirconia‐based composites with a metal‐like mechanical behavior

Forty years after the promise of «ceramic steel?»: Zirconia‐based composites with a metal‐like mechanical behavior

Additive Manufacturing of Ceramics: Issues, Potentialities, and Opportunities

Toward Strong and Tough Glass and Ceramic Scaffolds for Bone Repair

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