Fabrication of Foam-Type Porous Silicon Carbide without Cracks and Hollow Struts

2016 ◽  
Vol 369 ◽  
pp. 48-52
Author(s):  
Jeong Won Bang ◽  
Soo Ryong Kim ◽  
Young Hee Kim ◽  
Dong Geun Shin ◽  
Yoon Joo Lee ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Silicon Oxycarbide ◽  
X Ray Diffraction ◽  
Porous Silicon Carbide ◽  
Air Atmosphere ◽  
Sic Ceramics ◽  
Sic Ceramic ◽  
Curing Condition ◽  
Porous Sic

Foam-type porous silicon carbide (SiC) ceramics without cracks and hollow struts were fabricated using the polymer replica method with polycarbosilane (PCS) and polyurethane (PU) foam as the starting materials. The synthesized porous SiC was analyzed using X-ray diffraction and scanning electron microscopy. The results revealed that a porous SiC ceramic structure was formed with a dense framework at a low temperature of 1200°C. During the heat-treatment process, the PCS experienced an organic–inorganic transformation and then converted to the SiC ceramics. It was determined that the organic–inorganic transformation of PCS, which was the stage of silicon oxycarbide formation, is affected by the curing condition. In this study, the optimum curing condition was determined to be an air atmosphere at 200°C for 7 h.

Effects of Additives Content on the Properties of Porous SiC Ceramics

2016 ◽  
Vol 868 ◽  
pp. 89-94
Author(s):  
Rong Li ◽  
Rong Zhen Liu ◽  
Gao Jian Liu ◽  
Zhi Hao Jin
Keyword(s):  
Silicon Carbide ◽  
Melting Point ◽  
Porous Silicon ◽  
Bending Strength ◽  
Porous Silicon Carbide ◽  
Sic Ceramics ◽  
Proportional Relationship ◽  
Carbide Ceramics ◽  
Porous Sic ◽  
Silicon Carbide Ceramics

The porous silicon carbide ceramics were fabricated by adding a variety of low melting point oxides in this paper. The additives were mullite, magnesium oxide, calcium oxide, and vanadium oxide. Effects of the additives content on the properties of porous silicon carbide ceramics were studied. The results showed that, when the additives content was greater than 2.8%, the apparent porosity, the bending strength, the permeability and the pore size were in an inversely proportional relationship with the additives content, while the content was less than 2.8%, proportional relationship was observed. When the additives content reached 2.8%, the porous SiC ceramics showed the best performances.

scholarly journals Porous silicon carbide coated with tantalum as potential material for bone implants

2020 ◽  
Vol 7 (5) ◽  
pp. 453-459
Author(s):  
Zhijie Ma ◽  
Jingyu Li ◽  
Fang Cao ◽  
Jiahui Yang ◽  
Rong Liu ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Chemical Vapour ◽  
Bone Substitutes ◽  
Porous Titanium ◽  
X Ray Diffraction ◽  
Porous Silicon Carbide ◽  
Living Bone ◽  
Scaffold Structure ◽  
Porous Sic

Abstract Porous silicon carbide (SiC) has a specific biomorphous microstructure similar to the trabecular microstructure of human bone. Compared with that of bioactive ceramics, such as calcium phosphate, SiC does not induce spontaneous interface bonding to living bone. In this study, bioactive tantalum (Ta) metal deposited on porous SiC scaffolds by chemical vapour deposition was investigated to accelerate osseointegration and improve the bonding to bones. Scanning electron microscopy indicated that the Ta coating evenly covered the entire scaffold structure. Energy-dispersive spectroscopy and X-ray diffraction analysis showed that the coating consisted of Ta phases. The bonding strength between the Ta coating and the SiC substrate is 88.4 MPa. The yield strength of porous SiC with a Ta coating (pTa) was 45.8 ± 2.9 MPa, the compressive strength was 61.4 ± 3.2 MPa and the elastic modulus was ∼4.8 GPa. When MG-63 human osteoblasts were co-cultured with pTa, osteoblasts showed good adhesion and spreading on the surface of the pTa and its porous structure, which showed that it has excellent bioactivity and cyto-compatibility. To further study the osseointegration properties of pTa. PTa and porous titanium (pTi) were implanted into the femoral neck of goats for 12 weeks, respectively. The Van-Gieson staining of histological sections results that the pTa group had better osseointegration than the pTi group. These results indicate that coating bioactive Ta metal on porous SiC scaffolds could be a potential material for bone substitutes.

Visible Photoluminescence From Porous Silicon Carbide

1993 ◽  
Vol 298 ◽  
Author(s):  
T. Matsumoto ◽  
T. Tamaki ◽  
T. Futagi ◽  
H. Mimura ◽  
Y. Kanemitsu
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Silicon Crystal ◽  
Optical Measurements ◽  
Electrochemical Anodization ◽  
Green Luminescence ◽  
Porous Silicon Carbide ◽  
Electron Microscope Analysis ◽  
Red Luminescence ◽  
Porous Sic

AbstractWe have fabricated porous silicon carbide using single crystal 6H–SiC that has a wider indirect bandgap than silicon crystal prepared by electrochemical anodization. We have observed intense blue–green luminescence with the peak wavelength of around 500 nm at room temperature. The luminescence intensity is about five hundred times stronger than that of free electron to acceptor recombination in 6H–SiC crystal. This porous SiC offers an intense blue–green luminescent material. The results of structural analysis (secondary electron microscope analysis) and optical measurements (photoluminescence spectrum, Raman spectrum, and picosecond luminescence decay) suggest that the origin of the intense blue–green luminescence is the same as that of the intense red luminescence of porous silicon.

In Situ Synthesis of Porous Silicon Carbide (SiC) Ceramics Decorated with SiC Nanowires

2007 ◽  
Vol 0 (0) ◽  
pp. 070918221104008-??? ◽  
Author(s):  
Byung-Ho Yoon ◽  
Chee-Sung Park ◽  
Hyoun-Ee Kim ◽  
Young-Hag Koh
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
In Situ Synthesis ◽  
Porous Silicon Carbide ◽  
Sic Nanowires ◽  
Sic Ceramics

scholarly journals Porous silicon carbide derived from apple fruit with high electromagnetic absorption performance

2016 ◽  
Vol 4 (23) ◽  
pp. 5349-5356 ◽  
Author(s):  
Chenyu Liu ◽  
Dawei Yu ◽  
Donald W. Kirk ◽  
Yongjun Xu
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Porous Structure ◽  
Apple Fruit ◽  
Porous Silicon Carbide ◽  
Electromagnetic Absorption ◽  
Absorption Performance ◽  
Porous Sic

A method for the synthesis of porous SiC with excellent electromagnetic absorption performance which incorporates the natural porous structure of apple was reported.

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

2021 ◽  
Author(s):  
Giulia Tuci ◽  
Yuefeng Liu ◽  
Andrea Rossin ◽  
Xiangyun Guo ◽  
Charlotte Pham ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Active Phase ◽  
Porous Silicon Carbide

Investigation of porous silicon carbide as a new material for environmental and optoelectronic applications

2010 ◽  
Vol 256 (18) ◽  
pp. 5629-5639 ◽  
Author(s):  
A. Keffous ◽  
N. Gabouze ◽  
A. Cheriet ◽  
Y. Belkacem ◽  
A. Boukezzata
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Porous Silicon Carbide ◽  
New Material ◽  
Optoelectronic Applications

New porous silicon carbide composite reinforced by intact high-strength carbon fibres

2006 ◽  
Vol 26 (9) ◽  
pp. 1715-1724 ◽  
Author(s):  
Juliane Mentz ◽  
Marcus Müller ◽  
Meinhard Kuntz ◽  
Georg Grathwohl ◽  
Hans Peter Buchkremer ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
High Strength ◽  
Carbon Fibres ◽  
Porous Silicon Carbide ◽  
Carbide Composite

Infrared analysis of porous silicon carbide

2005 ◽  
Vol 202 (8) ◽  
pp. 1548-1551 ◽  
Author(s):  
A. M. Rossi ◽  
F. Giorgis ◽  
V. Ballarini ◽  
S. Borini
Keyword(s):  
Silicon Carbide ◽  
Porous Silicon ◽  
Infrared Analysis ◽  
Porous Silicon Carbide
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