Microstructural evolution in reaction-bonded silicon carbide

Ness, J. N.; Page, T. F.

doi:10.1007/bf00553278

Cited by 238 publications

(108 citation statements)

References 11 publications

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“…8). As testified in Ness JN and Page TF [36], the graphite was trapped by the growing grains before its reaction with liquid silicon during RB-SiC fabrication. Therefore, those two peaks should be caused by the D peak (disorder-induced A1g mode) and G peak (E2g mode) of graphite, respectively [37].…”

Section: Raman Spectroscopy Analysis Of Rb-sicmentioning

confidence: 97%

Experimental investigation on the surface and subsurface damages characteristics and formation mechanisms in ultra-precision grinding of SiC

Zhang

et al. 2017

Int J Adv Manuf Technol

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Surface and subsurface damages appear inevitably in the grinding process, which will influence the performance and lifetime of the machined components. In this paper, ultraprecision grinding experiments were performed on reactionbonded silicon carbide (RB-SiC) ceramics to investigate surface and subsurface damages characteristics and formation mechanisms in atomic scale. The surface and subsurface damages were measured by a combination of scanning electron microscopy (SEM), atomic force microscopy (AFM), raman spectroscopy, and transmission electron microscope (TEM) techniques. Ductile-regime removal mode is achieved below critical cutting depth, exhibiting with obvious plow stripes and pile-up. The brittle fracture behavior is noticeably influenced by the microstructures of RB-SiC such as impurities, phase boundary, and grain boundary. It was found that subsurface damages in plastic zone mainly consist of stacking faults (SFs), twins, and limited dislocations. No amorphous structure can be observed in both 6H-SiC and Si particles in RB-SiC ceramics. Additionally, with the aid of high-resolution TEM analysis, SFs and twins were found within the 6H-SiC closed packed plane, i.e., (0001). At last, based on the SiC structure characteristic, the formation mechanisms of SFs and twins were discussed, and a schematic model was proposed to clarify the relationship between plastic deformation-induced defects and brittle fractures.

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Section: Raman Spectroscopy Analysis Of Rb-sicmentioning

confidence: 97%

Experimental investigation on the surface and subsurface damages characteristics and formation mechanisms in ultra-precision grinding of SiC

Zhang

et al. 2017

Int J Adv Manuf Technol

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“…Infiltrated Si reacts with carbon to form SiC. Reactive infiltration is used to process the so-called "reaction-bonded silicon carbide" or SiC composites [28,29].…”

Section: Wetting In Infiltrationmentioning

confidence: 99%

Wetting by Liquid Metals—Application in Materials Processing: The Contribution of the Grenoble Group

Eustathopoulos

2015

Metals

133

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Abstract:The wettability of ceramics by liquid metals is discussed from both the fundamental point of view and the point of view of applications. The role of interfacial reactions (simple dissolution of the solid in the liquid or formation of a layer of a new compound) is illustrated and analysed. Several results are presented in order to illustrate the role of wettability in materials processing, namely infiltration processing, joining dissimilar materials by brazing and selecting crucibles for crystallising liquid metals and semiconductors. The review includes results obtained during the last 15 years mainly, but not only, by the Grenoble group.

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“…Silicon carbide the formation of silicon-carbide particles that bond the prethen precipitated in regions of lower temperature. [6,7,8] viously existing SiC grains. In another approach, carbonaHowever, there has been very little effort to study the ceous materials, such as carbon fiber tow, carbon fiber cloth, most important step in the conversion process: the process or felt, are infiltrated by molten silicon in vacuum to form of silicon infiltration through the porous carbon preforms.…”

Section: Introductionmentioning

confidence: 99%

“…The siliconization mechanism has been extensively studMessner and Chiang [9] formulated an analytical model ied via experiments on isolated carbon fibers or plates. [4][5][6][7][8][9] based on Darcy's law. [10] This model incorporated a varying Since molten silicon wets carbon, it wicks up into the micropermeability.…”

Section: Introductionmentioning

confidence: 99%

Reactive infiltration of silicon melt through microporous amorphous carbon preforms

Sangsuwan¹,

Tewari

Gatica

et al. 1999

Metall Mater Trans B

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The kinetics of unidirectional capillary infiltration of silicon melt into microporous carbon preforms has been investigated as a function of the pore morphology and melt temperature. The infiltrated specimens showed alternating bands of dark and bright regions, which corresponded to the unreacted free carbon and free silicon regions, respectively. The decrease in the infiltration front velocity for increasing infiltration distances is in qualitative agreement with the closed-form solution of capillaritydriven fluid flow through constant-cross-section cylindrical pores. However, drastic changes in the thermal response and infiltration front morphologies were observed for minute differences in the preform's microstructure. This suggests the need for a dynamic percolation model that would account for the exothermic nature of the silicon-carbon chemical reaction and the associated pore-closing phenomenon.

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Microstructural evolution in reaction-bonded silicon carbide

Cited by 238 publications

References 11 publications

Experimental investigation on the surface and subsurface damages characteristics and formation mechanisms in ultra-precision grinding of SiC

Experimental investigation on the surface and subsurface damages characteristics and formation mechanisms in ultra-precision grinding of SiC

Wetting by Liquid Metals—Application in Materials Processing: The Contribution of the Grenoble Group

Reactive infiltration of silicon melt through microporous amorphous carbon preforms

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