Biomorphic SiC Ceramics Prepared by Organic Template Method

Dense SiC/Si ceramics were prepared by a silicon melt infiltration method. Highly porous SiC ceramics with a wood-like microstructure were prepared by silica sol infiltration and carbothermal reduction reaction. Furthermore, laminated SiC/Si composites were also prepared by the carbonization and silicon melt infiltration of stacked papers. The microstructure and characteristics for this series of materials were determined and compared.

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The Prediction of Carbothermal Reduction Reaction Induced Ti 4 O 7 /Ti 5 O 9 Interface Structures in Titanium Oxide Nanosystems

Advanced Materials Interfaces ◽

10.1002/admi.201801256 ◽

2018 ◽

Vol 5 (23) ◽

pp. 1801256 ◽

Cited By ~ 2

Author(s):

Yimin Lei ◽

Xin Lin ◽

Qihang Hu ◽

Nuanyang Cui ◽

Peng Zhong ◽

...

Keyword(s):

Titanium Oxide ◽

Carbothermal Reduction ◽

Reduction Reaction ◽

Interface Structures ◽

Carbothermal Reduction Reaction

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Mechanism for the formation of SiC by carbothermal reduction reaction using a microwave heating technique

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj2.119.740 ◽

2011 ◽

Vol 119 (1394) ◽

pp. 740-744 ◽

Cited By ~ 11

Author(s):

Shinobu HASHIMOTO ◽

Syuho OHASHI ◽

Kiyoshi HIRAO ◽

You ZHOU ◽

Hideki HYUGA ◽

...

Keyword(s):

Microwave Heating ◽

Carbothermal Reduction ◽

Reduction Reaction ◽

Carbothermal Reduction Reaction

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Tailored MoSi2/SiC composites by mechanical alloying

Journal of Materials Research ◽

10.1557/jmr.1993.1428 ◽

1993 ◽

Vol 8 (6) ◽

pp. 1428-1441 ◽

Cited By ~ 43

Author(s):

S. Jayashankar ◽

M.J. Kaufman

Keyword(s):

Mechanical Alloying ◽

Carbothermal Reduction ◽

Reduction Reaction ◽

Partial Pressures ◽

Micron Size ◽

Important Processing ◽

Sic Composites ◽

Carbon Additions ◽

Carbothermal Reduction Reaction

MoSi2-based composites have been synthesized through the mechanical alloying (MA) of elemental molybdenum and silicon powders with and without carbon additions. The interplay between the phase formation sequence in the powders and the microstructural evolution in the consolidated samples is described. It is shown that the glassy SiO2 phase characteristic of conventional powder processed MoSi2 can be effectively eliminated by combining mechanical alloying, carbon additions, and an in situ carbothermal reduction reaction. Using this approach, composites consisting of uniformly distributed micron-size SiC in an MoSi2 matrix can be formed. The effect of important processing variables such as the extent of carbon additions, extraneous iron pickup during MA, partial pressures of oxygen, consolidation temperatures, and consolidation atmospheres is discussed based on the evidence obtained from DTA, TGA, TEM, and XRD.

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Processing highly porous SiC ceramics using poly(ether-co-octene) and hollow microsphere templates

Journal of Materials Science ◽

10.1007/s10853-011-5284-3 ◽

2011 ◽

Vol 46 (10) ◽

pp. 3664-3667 ◽

Cited By ~ 16

Author(s):

B. V. Manoj Kumar ◽

Wentao Zhai ◽

Jung-Hye Eom ◽

Young-Wook Kim ◽

Chul B. Park

Keyword(s):

Hollow Microsphere ◽

Sic Ceramics ◽

Porous Sic ◽

Highly Porous

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Wood-Derived Porous Ceramics via Infiltration of SiO2-Sol and Carbothermal Reduction

Holzforschung ◽

10.1515/hf.2003.065 ◽

2003 ◽

Vol 57 (4) ◽

pp. 440-446 ◽

Cited By ~ 18

Author(s):

R. Klingner ◽

J. Sell ◽

T. Zimmermann ◽

A. Herzog ◽

U. Vogt ◽

...

Keyword(s):

Cell Wall ◽

Carbothermal Reduction ◽

Porous Ceramics ◽

Nitrogen Atmosphere ◽

Silica Sol ◽

Simple Process ◽

Sic Ceramic ◽

Efficient Route ◽

The Individual ◽

Highly Porous

Summary The use of wood as a structure-giving material may be the key to producing temperature-resistant ceramics featuring high and directed porosity combined with necessary strength. The objective of this study was to develop a simple process to convert the evolutionarily optimized material wood into highly porous ceramics. Beech and pine, known to be relatively permeable, were pyrolyzed in a nitrogen atmosphere. The carbon-templates formed were infiltrated with various kinds of silica sol (SiO2). The resulting SiO2/C composite was transformed into a SiC-ceramic (silicon carbide) via carbothermal reduction. Through the described process the macroscopic pore-structure of wood was transformed exactly into SiC. The SiC-ceramic produced proved to be thermo-resistant. It remained stable in oxygen atmosphere at 1200°C, after a SiO2 coating around the SiC had been formed. This study focused on the alteration of the cell wall microstructure during the conversion of wood into SiC. Furthermore, the optimization of the individual process steps, pyrolysis, infiltration and ceramization along the most efficient route was pursued.

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