Application of carbonaceous template for porous structure control of ceramic composites based on synthetic wollastonite obtained via Spark Plasma Sintering

Папынов, Е. К.; Mayorov, V. Yu.; Portnyagin, A. S.; Shichalin, O.O.; Kobylyakov, S. P.; Kaidalova, T. A.; Nepomnyashiy, A.V.; Sokol'nitskaya, T. A.; Zub, Yu. L.; Авраменко, В. А.

doi:10.1016/j.ceramint.2014.09.045

Cited by 30 publications

(28 citation statements)

References 20 publications

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“…This fact was revealed in our previous work [26], where we showed that inner porous structure of wollastonite powder during SPS consolidation was unstable to the mechanical load and was easily destructed. This fact was revealed in our previous work [26], where we showed that inner porous structure of wollastonite powder during SPS consolidation was unstable to the mechanical load and was easily destructed.…”

Section: Resultssupporting

confidence: 58%

“…However, concerning wollastonite synthesis the majority of these conventional methods, namely hot or isostatic compacting do not ensure the preservation of materials porous structure [10,11]. A successful attempt to fabricate the ceramic wollastonite with determined set of mechanical and structural characteristics via SPS method was studied by us earlier in [26]. Well-known methods, enabling to preserve material's structure, are based on suppressing the intensity of solid phase processes, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Wollastonite ceramics with bimodal porous structures prepared by sol–gel and SPS techniques

et al. 2016

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In this work we suggest a novel synthetic route combining Sol-Gel and SPS to fabrication of porous ceramics based on wollastonite with bimodal pore size distribution (100-500 nm and 1-500 µm) and high mechanical strength (Young's Modulus from 72.5 to 172 MPa). We studied peculiarities of formation biporous silicate framework using two types of poreforming additives (templates) of various nature, shape and size, introduced during different stages of Sol-Gel and SPS synthesis: organo-nonorganic (polymer latex of "core-shell" type) and nonorganic (carbonaceous filler). The influence of carbonaceous template content (5 or 25%) on structural and mechanical properties of ceramics synthesized in the current of spark plasma was described. Original approach presented here provides formation of wollastonite ceramics of high mechanical strength with biporous structure that is similar to texture of bone tissue and is capable of executing its main functions. Obtained ceramics meets all the requirements of bioceramics class and is demanded by modern medicine. Please do not adjust marginsPlease do not adjust margins microscopy (SEM) on Hitachi S-3400N (Japan) and two-beam settings (Dual Beam) Carl Zeiss CrossBeam the XB 1540 (Germany) and FEI Helios NanoLab 450s (Netherlands). The cross-sections of samples were prepared by the method of a focused ion beam (FIB) for study the internal structure of the ceramics.

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Section: Resultssupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Wollastonite ceramics with bimodal porous structures prepared by sol–gel and SPS techniques

et al. 2016

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“…The structural strength of the SPS ceramics is achieved without the need for additional reinforcement components that contaminate the final product. Our early studies have identified the above-described prospects of SPS application for the synthesis of nanostructured bioceramic wollastonite [ 42 , 43 , 44 , 45 ] with its bioactive properties being assessed “in vivo” [ 46 ]. Additionally, these studies showed several original methods for developing a porous structure of the ceramics that is similar to the texture of bone tissue by introducing various porous templates.…”

Section: Introductionmentioning

confidence: 99%

CaSiO3-HAp Structural Bioceramic by Sol-Gel and SPS-RS Techniques: Bacteria Test Assessment

Папынов

Shichalin

Buravlev

et al. 2020

JFB

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The article presents an original way of getting porous and mechanically strong CaSiO3-HAp ceramics, which is highly desirable for bone-ceramic implants in bone restoration surgery. The method combines wet and solid-phase approaches of inorganic synthesis: sol-gel (template) technology to produce the amorphous xonotlite (Ca6Si6O17·2OH) as the raw material, followed by its spark plasma sintering–reactive synthesis (SPS-RS) into ceramics. Formation of both crystalline wollastonite (CaSiO3) and hydroxyapatite (Ca10(PO4)6(OH)2) occurs “in situ” under SPS conditions, which is the main novelty of the method, due to combining the solid-phase transitions of the amorphous xonotlite with the chemical reaction within the powder mixture between CaO and CaHPO4. Formation of pristine HAp and its composite derivative with wollastonite was studied by means of TGA and XRD with the temperatures of the “in situ” interactions also determined. A facile route to tailor a macroporous structure is suggested, with polymer (siloxane-acrylate latex) and carbon (fibers and powder) fillers being used as the pore-forming templates. Microbial tests were carried out to reveal the morphological features of the bacterial film Pseudomonas aeruginosa that formed on the surface of the ceramics, depending on the content of HAp (0, 20, and 50 wt%).

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“…Spark plasma sintering (SPS) was used for integrating wollastonite into the cellular Ti6Al4V structure [26]. Highly porous acicular wollastonite (CaSiO 3 ) with micro-or nano-sized pores results in high corrosion resistance and good biocompatibility [27,28].Hence, the present study aims to fabricate Ti6Al4V scaffolds reinforced with bioactive elements (wollastonite) for the proper integration of the implant to the bone via tissue growth. By reviewing the articles, the deficiency of comparison between the mechanical properties of scaffolds, FEA, and an assortment of them regarding the applications is tangible.…”

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confidence: 99%

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confidence: 99%

Mechanical Behavior of Ti6Al4V Scaffolds Filled with CaSiO3 for Implant Applications

et al. 2019

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Triply periodic minimal surfaces (TPMS) are becoming increasingly attractive due to their biomedical applications and ease of production using additive manufacturing techniques. In the present paper, the architecture of porous scaffolds was utilized to seek for the optimized cellular structure subjected to compression loading. The deformation and stress distribution of five lightweight scaffolds, namely: Rectangular, primitive, lattice, gyroid and honeycomb Ti6Al4V structures were studied. Comparison of finite element simulations and experimental compressive test results was performed to illustrate the failure mechanism of these scaffolds. The experimental compressive results corroborate reasonably with the finite element analyses. Results of this study can be used for bone implants, biomaterial scaffolds and antibacterial applications, produced from the Ti6Al4V scaffold built by a selective laser melting (SLM) method. In addition, Ti6Al4V manufactured metallic lattice was filled by wollastonite (CaSiO 3 ) through spark plasma sintering (SPS) to illustrate the method for the production of a metallic-ceramic composite suitable for bone tissue engineering.Gradient structures, unit cell size, strut diameter, the volume fraction the of sample, plasticity and damage tolerance, as well as the minimizing of cost/time are considered during the computer-aided design (CAD) and simulation. In order to have optimized lightweight structures under loading and in vivo or in vitro conditions, printed scaffolds can be graded axially or radially [12]. Recently, research is focused upon polymeric printing using polyjet/inkjet deposition [13], which is faster with no post-processing, unlike metal printing. However, the low mechanical properties of polymer 3D printed materials make it non-applicable for in vivo conditions. Porous Ti6Al4V structures have yield strength and compressive strength in the range of 90-220 MPa [14]. The computer-aided design (CAD) of porous scaffolds and finite element analysis (FEA) have recently attracted much attention in the tissue engineering field. Fluid permeability [15] and biocompatibility [16] of scaffolds depends directly on the pore geometry and topology [17] of structures. The curved shape, smoothness, good flowability, 3D manufacturability and biocompatibility of Ti6Al4V powder particles makes Ti-based alloy promising for load bearing bone implants [18]. It is well known that the artificial bone scaffolds should have the following characteristics: (1) Biocompatibility with living tissues; (2) mechanical properties for trabecular bone and cortical bone (ranging from 0.7 to 15 MPa till >100 MPa [19]); and (3) porous fabricated structures for osteoporosis diseases. Periodic porous materials like TPMS are potential candidates for biomimetic scaffold architecture [19]. The main advantage of TPMS scaffolds is the open interconnected cell structure, deemed to facilitate cell migration, vitalization and vascularization, while retaining a high degree of structural stiffness [20]. Henceforth, mechanical ...

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Application of carbonaceous template for porous structure control of ceramic composites based on synthetic wollastonite obtained via Spark Plasma Sintering

Cited by 30 publications

References 20 publications

Wollastonite ceramics with bimodal porous structures prepared by sol–gel and SPS techniques

Wollastonite ceramics with bimodal porous structures prepared by sol–gel and SPS techniques

CaSiO3-HAp Structural Bioceramic by Sol-Gel and SPS-RS Techniques: Bacteria Test Assessment

Mechanical Behavior of Ti6Al4V Scaffolds Filled with CaSiO3 for Implant Applications

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