Characterization of recent silicon carbide whiskers

Silicon carbide whiskers are of interest as dispersed phase strengthened in metals, ceramics, and polymer composites. Characterization of whisker structure, including surface morphology, crystallography and chemistry, is important so that whisker models can be devised on which calculations of surface energetics controlling wetting/bonding phenomena can be accurately based. In current work, the microstructures of several commercially-available SiC whisker types have been characterized by high resolution TEM and surface analysis techniques. Results of the characterization of one manufacturer's whiskers, Tateho Chemical Industries, are described in this paper.

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Fabrication and Characterization of Conductive Glass Composites with Networks of Silicon Carbide Whiskers

Ceramic Transactions Series - Processing and Properties of Advanced Ceramics and Composites VI ◽

10.1002/9781118995433.ch3 ◽

2014 ◽

pp. 27-36

Author(s):

Timothy L. Pruyn ◽

Rosario A. Gerhardt

Keyword(s):

Silicon Carbide ◽

Glass Composites ◽

Conductive Glass ◽

Silicon Carbide Whiskers ◽

Fabrication And Characterization

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Characterization of Silicon Carbide Whiskers

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1989.tb05999.x ◽

1989 ◽

Vol 72 (10) ◽

pp. 1907-1913 ◽

Cited By ~ 26

Author(s):

Keith R. Karasek ◽

Steven A. Bradley ◽

Jeffry T. Donner ◽

Harry C. Yeh ◽

James L. Schienle ◽

...

Keyword(s):

Silicon Carbide ◽

Silicon Carbide Whiskers

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Characterization of silicon carbide platelet-reinforced alumina

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010017829x ◽

1990 ◽

Vol 48 (4) ◽

pp. 1032-1033

Author(s):

K. B. Alexander ◽

P. F. Becher ◽

S. B. Waters

Keyword(s):

Silicon Carbide ◽

Hot Pressing ◽

Slow Crack Growth ◽

Ceramic Composites ◽

Alumina Powder ◽

Platelet Volume ◽

Silicon Carbide Whiskers ◽

Sic Whiskers ◽

Ceramic Matrices

The incorporation of silicon carbide whiskers into ceramic matrices has been shown to result in significant increases in toughness, strength, resistance to thermal shock, slow crack growth, and creep. The health hazards associated with the handling of silicon carbide whiskers, however, can be considerable. Silicon carbide platelets are therefore being considered as an alternative to whiskers for reinforcing ceramic composites.The silicon carbide platelets used in this study were supplied by Alcan International Ltd. The platelets varied from 1 to 5 μm in thickness and 5 to 45 μm in diameter. Sumitomo alumina powder was mixed with the platelets and the composites were fabricated by hot-pressing in vacuum at 1600°C for 1.5 h. The resultant composites had the platelet faces oriented primarily perpendicular to the hot-pressing axis. Specimens containing 7 vol% SiC platelets had a fracture toughness of 6.6 MPa m½, which is about the same value as observed for alumina of equivalent grain size containing 7 vol% SiC whiskers. Considerable porosity was observed in specimens with platelet volume fractions larger than 7 vol%.

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Synthesis and characterization of silicon carbide whiskers

Carbon ◽

10.1016/s0008-6223(01)00153-1 ◽

2001 ◽

Vol 39 (12) ◽

pp. 1929-1930 ◽

Cited By ~ 33

Author(s):

Zhenyu Ryu ◽

Jingtang Zheng ◽

Maozhang Wang ◽

Bijiang Zhang

Keyword(s):

Silicon Carbide ◽

Synthesis And Characterization ◽

Silicon Carbide Whiskers

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Irradiation behavior of pyrolytic silicon carbide

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100074288 ◽

1983 ◽

Vol 41 ◽

pp. 72-73

Author(s):

R. J. Lauf

Keyword(s):

Silicon Carbide ◽

Fission Products ◽

Thermodynamics And Kinetics ◽

Neutron Fluences ◽

Fuel Particles ◽

Sic Coatings ◽

Irradiation Behavior ◽

Kinetics Of ◽

Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

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