Preparation and characterization of porous, biomorphic SiC ceramic with hybrid pore structure

Qian, Junmin; Jin, Zhihao

doi:10.1016/j.jeurceramsoc.2005.03.229

Cited by 85 publications

(52 citation statements)

References 16 publications

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“…4),7),8) Other reported methods for the synthesis of the biomorphic SiC ceramics also require temperatures above 1573 K for the pyrolysis of Si contained vapors 9) and precursors and for carbothermal reduction. 10)- 14) In the previous high-temperature processes, grain growth was observed at the cellular wall. In our low temperature synthesis, the fine structure and texture of the original carbonized wood structure were fairly well maintained (Fig.…”

Section: Resultsmentioning

confidence: 99%

Low-temperature synthesis of biomorphic cellular SiC ceramics from wood by using a Na flux

Yamane

Kawamura

Yamada

2008

J. Ceram. Soc. Japan

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Wood from balsa and Japanese cypress was transformed into carbonaceous preforms by pyrolysis and subsequently converted into cellular SiC ceramics by heating with Na and Si at 973 K for 86.4 ks. X-ray diffraction showed the structure of the formed SiC to be cubic b-type. Cellular structures similar to those of the preforms were observed for the resulting porous SiC ceramics by scanning electron microscopy.

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Section: Resultsmentioning

confidence: 99%

Low-temperature synthesis of biomorphic cellular SiC ceramics from wood by using a Na flux

Yamane

Kawamura

Yamada

2008

J. Ceram. Soc. Japan

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“…Figure 4 presents the FTIR spectrum of the scaffold where the main vibration modes were identified as follows: ). [23][24][25] Furthermore, the peak at 873 cm −1 attributed to C-H out of plane bending in benzene derivatives. 26 In fact, well-resolved peak emerged at 1380 attributed to C-H 3 methyl umbrella bending mode.…”

Section: C-scaffolds' Microstructurementioning

confidence: 99%

Biomineralization of marine-patterned C-scaffolds

Rodríguez-Valencia¹,

López‐Álvarez²,

Stefanov³

et al. 2014

Bioinspired, Biomimetic and Nanobiomaterials

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IntroductionNowadays, the design of 3D scaffolds for the replacement, repair and regeneration of the different human tissues is one of the main pillars and challenges of regenerative medicine. In the case of bone tissue, it is important that its tissue engineering scaffolds present a determined surface chemistry, hierarchical porosity and surface topography that will promote cell attachment and differentiation.One of the most successful strategies for improving the biocompatibility of the device is to provide it with a calcium phosphate coating resembling, thus, the mineral part of the human bone tissue (hydroxyapatite), which promotes an osteogenic, osteoconductive or osteoinductive activity. However, these bioactive ceramic coatings have also been cited as an efficient strategy to overcome the fibrous tissue encapsulation, a common problem for synthetic metallic and polymeric implants in vivo. 1To produce bioceramic coatings, different techniques such as plasma spray, pulsed laser deposition or electron beam evaporation have been intensively studied, but, trying to follow the main postulates that regenerative medicine promotes, the deposition of this calcium phosphate by means of a biomimetic process seems to be the main challenge. Thus, the biomimetic method was first developed by Kokubo 2 with the purpose of obtaining a calcium phosphate layer by using a simple process based on the immersion of the material (metal, polymer or ceramic) in a simulated body fluid (SBF) with ion concentrations similar to human blood plasma obtaining a bonelike apatite layer on various types of organic polymer and titanium substrates. However, traditional SBF solutions require of lengthy incubation times, typically more than 7 d, to get obtained a uniform calcium phosphate coating. Recent efforts to shorten the time needed for coating have focused on increasing ionic concentrations. Although still a matter of some controversy, the ability of implants to form a calcium phosphate in SBF is object of much interest, and it could give important information on in vivo behavior.3,4 The use of Dulbecco's phosphate-buffered saline solutions (DPBS; Sigma-Aldrich, Schnelldorf, Germany) instead of SBF has also been investigated as a biomimetic fluid. Results have been obtained

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“…4,7,8) Other reported methods for the synthesis of the SiC ceramics also require temperatures above 1573 K for the pyrolysis of Si contained vapors 9) and precursors and for carbothermal reduction. [10][11][12][13][14] It was worth noting that the SiC porous ceramics with high strength could be synthesized at low-temperature of 973 K. Furthermore, the porosity and pore size distribution, as well as hardness and strength, of SiC porous ceramics can probably be controlled by selecting the carbon templates in the present process.…”

Section: Low-temperature Synthesis Of Sic Porous Granules With a Na Fluxmentioning

confidence: 99%

“…The carbonized wood can be converted into a silicon carbide cellular ceramic by various methods, such as infiltration and reaction with liquid Si, 4,7,8) Si containing vapors, 9) and infiltration and carbothermal reduction of a sol containing colloidal silica. [10][11][12][13][14] Biomorphic SiC has also been produced directly from raw wood impregnated with sodium silicate. 15) However, high-temperature conditions above 1573-1973 K are necessary for these processes and the crystallization of SiC.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Synthesis and Mechanical Properties of SiC Porous Granules from Activated Charcoal with a Na Flux

et al. 2008

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SiC porous granules were synthesized from activated granular charcoal and Si powder at 973 K by using a Na flux. The SiC granules maintained the shape of the charcoal with a dimension of about 5 mm in diameter and 7-10 mm in length. X-ray diffraction showed the structure of the formed SiC to be cubic -type. Agglomerates of a few dozen nm of SiC grains and an electron diffraction ring pattern of -SiC were observed with a transmission electron microscope. A micropore size distribution of < 4 nm and mesopores in the range of 20-40 nm were shown by a nitrogen adsorption technique. The SiC granules had a specific surface area of 3:4 AE 1:0 m 2 /g and a pore volume of 0:006 AE 0:002 cm 3 /g. The fracture stress of the SiC porous granules was evaluated to be 47 MPa by a compressive test at room temperature. The Vickers hardness of the granule surface was 13:1 AE 1:0 GPa.

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Preparation and characterization of porous, biomorphic SiC ceramic with hybrid pore structure

Cited by 85 publications

References 16 publications

Low-temperature synthesis of biomorphic cellular SiC ceramics from wood by using a Na flux

Low-temperature synthesis of biomorphic cellular SiC ceramics from wood by using a Na flux

Biomineralization of marine-patterned C-scaffolds

Low-Temperature Synthesis and Mechanical Properties of SiC Porous Granules from Activated Charcoal with a Na Flux

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