Fabrication and Properties of Fiber- and Particulate-Reinforced SiC Matrix Composites Obtained with (A)HPCS as the Matrix Source

Interrante, L. V.; Jacobs, Joseph B.; Sherwood, Walter; Whitmarsh, C.W.

doi:10.4028/www.scientific.net/kem.127-131.271

Cited by 27 publications

(25 citation statements)

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“…It offers direct control of the microstructure and composition; allows for incorporation of fibrous and particulate reinforcements; and, perhaps most importantly, offers the possibility of net shape manufacturing at temperatures as low as 500-1500 • C [57][58][59]. In this manner, the PIP process can be used for consolidation of several compatible species due to its adaptability.…”

Section: Sic Fabrication Using Polymer Infiltration and Pyrolysismentioning

confidence: 99%

“…Polymer infiltration and pyrolysis has been identified as a viable alternative for fabricating SiC based materials [31,[57][58][59][62][63][64][65]. However, the use of PIP for fabricating materials targeted for nuclear applications is limited.…”

Section: Sic Fabrication Using Polymer Infiltration and Pyrolysismentioning

confidence: 99%

“…It is an ultra high purity precursor that yields a near stoichiometric ratio on complete pyrolysis [59]. Its high ceramic yield, relatively low shrinkage and ability to be handled and processed in ambient conditions have attracted wide attention, especially as precursor to SiC fibers and more recently as matrix material [48,58,134,135].…”

Section: Prior Studies On Ahpcs-derived Silicon Carbidementioning

confidence: 99%

“…Thus it has a Si:C ratio that is close to 1:1 and yields a near stoichiometric SiC upon pyrolysis. AHPCS is commercially available through Starfire Systems Co. (Malta, New York, USA) and is being researched as a binder for ceramic powders and matrix source for polymer-derived ceramic matrix composites [58,59,134]. It has also been used to produce SiC coatings and join monolithic and composite ceramic parts [62,140].…”

Section: Prior Studies On Ahpcs-derived Silicon Carbidementioning

confidence: 99%

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Novel Processing of Unique Ceramic-Based Nuclear Materials and Fuels

Zhang¹,

Singh²

2008

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Advances in nuclear reactor technology and the use of gas-cooled fast reactors require the development of new materials that can operate at the higher temperatures expected in these systems. These include refractory alloys based on Nb, Zr, Ta, Mo, W, and Re; ceramics and composites such as those based on silicon carbide (SiC f -SiC); carbon-carbon composites; and advanced coatings. Besides the ability to handle higher expected temperatures, effective heat transfer between reactor components is necessary for improved efficiency. Improving thermal conductivity of the materials used in nuclear fuels and other temperature critical components can lower the center-line fuel temperature and thereby enhance durability and reduce the risk of premature failure.Silicon carbide (SiC) is an important ceramic, most commonly used because of its excellent properties such as high strength, high modulus, excellent creep resistance and its high temperature stability. Moreover, crystalline silicon carbide is attracting wide attention as a promising candidate for several applications in nuclear reactors owing to its high thermal conductivity, high melting temperature, good chemical stability, and resistance to swelling under heavy ion bombardment. There have been many efforts to develop SiC based composites in various forms for use in advanced energy systems. However, fabricating SiC based composites by traditional powder processing route generally requires very high temperatures for pressureless sintering. In recent years, with the development of high yield preceramic precursors, the polymer infiltration and pyrolysis (PIP) method has aroused interest for the fabrication of ceramic based materials. Polymer derived ceramic materials offer unique advantages such as ability to fabricate net shaped components, incorporate reinforcements, along with lower processing temperatures, and perhaps most importantly relatively easy control over the microstructure. The raw materials are element-organic polymers whose composition and architecture can be tailored and varied.The primary focus of this work is to use a pyrolysis-based process to fabricate a host of novel silicon carbide-metal carbide/oxide composites, and to synthesize new materials based on mixed-metal (metal/silicon) carbides that cannot be processed using conventional techniques. These mixedcarbide material systems are expected to offer improved material properties for higher-temperature applications. Our fabrication technique resulted in both amorphous and nano-grained SiC matrix composites by controlled pyrolysis of allylhydridopolycarbosilane (AHPCS), the precursor for SiC for our study, under inert argon atmosphere.Cylindrical pellets, φ25 × 25 mm, were fabricated for bulk scale characterization. These samples were analyzed in terms of density and porosity, thermal conductivity, and flexural strength under multiaxial loading conditions. The final composition in the fabricated composite was studied use Xray diffraction (XRD). This was useful in understanding the relative stabil...

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Section: Sic Fabrication Using Polymer Infiltration and Pyrolysismentioning

confidence: 99%

Section: Sic Fabrication Using Polymer Infiltration and Pyrolysismentioning

confidence: 99%

Section: Prior Studies On Ahpcs-derived Silicon Carbidementioning

confidence: 99%

Section: Prior Studies On Ahpcs-derived Silicon Carbidementioning

confidence: 99%

See 2 more Smart Citations

Novel Processing of Unique Ceramic-Based Nuclear Materials and Fuels

Zhang¹,

Singh²

2008

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“…Many composite programs have been described in a recent publication [1]. Recently, commercial scale-up for production of a SiC/SiC CMC using polymeric precursors has been reported [2][3]. Of the two types of ceramic fibers most readily available, SiC fibers tend to be much more expensive than A1203-based fibers although SiC fibers can be used at much higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

Low-cost matrix development for an Oxide-Oxide composite

Johnson

Blum

Kanazawa

et al. 1998

Metals and Materials

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Continuous oxide fiber/oxide matrix composites are attractive for use as high temperature structural materials because they can combine composite properties with long-term oxidative stability. The development of a matrix for such a composite and prevention of matrix-fiber coating interaction is described here. The ~oal use temperature of this composite is 1100~ to 1200~ The composite is being developed by the M C Consortium comprising 3M, Rockwell International, and SRI International. The composite consists of an alumina-based woven-tow fiber preform, coated with lanthanum phosphate (monazite) to promote fiber debonding and pullout, in an oxide matrix derived from a preceramic-polymer slurry filled with active and inert powders. This approach to the matrix enables conventional polymer matrix composite technology to be used in composite part fabrication. Only one infiltration of the matrix is required, a critical factor in keeping the cost low.

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