Synthesis of β-SiC Whiskers from Silica Black Ore

Shimada, Shiro; Akazawa, Nobuyuki; Kudo, Kazuhiko

doi:10.2109/jcersj.104.992

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Reaction Of Tic With Sicl 4 Without H1

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2009

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Cited by 4 publications

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“…These droplets should be formed by enrichment of W and Mo, acting as a catalyst for the formation of SiC fibers through vapor-liquid-solid process (VLS). 17 …”

Section: Reaction Of Tic With Sicl 4 Without Hmentioning

confidence: 99%

Reaction of TiC with SiCl4 vapor with formation of SiC–TiC composites

Shimada

Onuma

2009

Journal of the European Ceramic Society

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“…These droplets should be formed by enrichment of W and Mo, acting as a catalyst for the formation of SiC fibers through vapor-liquid-solid process (VLS). 17 …”

Section: Reaction Of Tic With Sicl 4 Without Hmentioning

confidence: 99%

Reaction of TiC with SiCl4 vapor with formation of SiC–TiC composites

Shimada

Onuma

2009

Journal of the European Ceramic Society

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“…Among these, silicon carbide whiskers (SiC W ) have been extensively studied as reinforcing materials in ceramic matrices. [1][2][3][4] Three main methods have been utilized to synthesize SiC W : (i) carbothermal reduction of silica in the presence of metal catalysts including rice-hulls as starting material, [5][6][7][8][9][10][11] (ii) thermal decomposition of organic silicon compounds, 12,13 and (iii) reaction between halides in presence of hydrogen. 14,15 Because of its simplicity, the first method is the most utilized.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Al₂O₃–SiC from kyanite precursor

Amroune

Fantozzi

2001

J. Mater. Res.

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Carbothermal reduction of kyanite, a natural aluminosilicate with high alumina content (Al 2 O 3 и SiO 2 ), was used as a way to synthesize SiC-Al 2 O 3 powder. Carbon black was mixed with the mineral precursor in a molar ratio of (C/SiO 2 ) ‫ס‬ 5.5. The Carbothermal reaction sequence was studied in the temperature range 1260-1550°C. Completion of the reaction at 1550°C gave ␤-SiC-whiskers and ␣-Al 2 O 3 particles as final products. From observations, the impurities contained in the mineral precursor behave as catalysts for the vapor-liquid-solid whisker growth mechanism. When the specific surface area of the starting carbon was increased from 330 to 996 m 2 /g, the carbothermal reaction rate increased but the morphology of the SiC-whiskers became very irregular. This study aimed to identify the main reaction conditions for obtaining a favorable morphology of the synthesized powder for elaborating Al 2 O 3 -SiC-whisker composite materials by using low cost starting materials and a relatively simple in situ synthesis route in comparison to the conventional way of separately preparing the phases SiC (whiskers) and Al 2 O 3 before elaborating composites.

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