Morphology and microstructure of 2.5 dimension C/SiC composites ablated by oxyacetylene torch

Fang, Dan; Chen, Zhaofeng; Song, Yingdong; Sun, Zhigang

doi:10.1016/j.ceramint.2008.06.008

Cited by 65 publications

(35 citation statements)

References 16 publications

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“…Similar observations have been reported elsewhere. [14][15][16]19 A typical optical micrograph image of the as-fabricated C/SiC composite is shown in Fig. 3; it is evident from the figure that the residual silicon is being surrounded by the SiC matrix.…”

Section: Resultsmentioning

confidence: 98%

“…Similar findings have been reported in literature. 14,39 When there is only an oxidation process, the tail end of the carbon fibers becomes flat bottom, 39,40 and when there is an ablation process, they get tapered. 14 Thus, the thermophysical and thermomechanical attack cause ablation.…”

Section: Resultsmentioning

confidence: 99%

“…Uniform properties and the high ablation resistance may be obtained in a composite by selecting an appropriate fiber architecture and the process parameters. [13][14][15][16][17][18] Ablation properties of the C/SiC composite nozzle fabricated via chemical vapor infiltration (CVI) process have been reported under the ethanol/oxygen propulsion system for a short duration. 13 Although the CVI-based composites posses better mechanical properties, their fabrication is difficult due to certain challenges, such as larger process time and density gradation across the composite thickness.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15] But oxy-acetylene flame does not simulate the rocket motor exhaust conditions with respect to the chemical composition of the oxidizing gases, temperature, pressure, and the shear forces. [13][14][15] Therefore, the nozzle material should be evaluated for the key properties before the actual use as a rocket motor nozzle of any system. It is desired that the nozzle material should have uniform thermomechanical properties in all the directions apart from the high ceramic contents for the better ablation resistance.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and Ablation Studies of 4D C/SiC Composite Nozzle Under Liquid Propulsion

Kumar

Mala

et al. 2015

Int J Applied Ceramic Tech

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4D C/SiC composite nozzle was fabricated using LSI and characterized for mechanical, thermal, and ablation properties. Average flexural and compressive strengths in the Z-direction were found to be 119 and 110 MPa, while in the U-, V-and W-directions, they were 99 and 55MPa, respectively. Coefficient of thermal expansion was found to be varied in the range 0-1.5 9 10 À6 /°C (25-1050°C), while thermal diffusivity was 40-5 mm 2 /s (25-1200°C). Ablation behavior of the nozzle was evaluated under UH25/N 2 O 4 propulsion system for 30 s. The overall mass erosion rate and the linear ablation rate were found to be 0.119 kg/m 2 s and 0.05 mm/s, respectively.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication and Ablation Studies of 4D C/SiC Composite Nozzle Under Liquid Propulsion

Kumar

Mala

et al. 2015

Int J Applied Ceramic Tech

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“…The adhesion between coating and substrate at high temperature could be influenced by the poor wetting between C element and Ir element. In general, ablation phenomenon was a combination of oxidation and erosion factors from high temperature, high pressure, and high velocity of oxyacetylene flame [20]. The ablation mechanism of the coating under oxyacetylene flame was a combined effect of thermo-chemicals ablation, thermo-physicals and thermo-mechanical attacks.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and evolution of iridium coating on the C/C composites ablated by oxyacetylene torch

Chen

Cheng

et al. 2010

Acta Astronautica

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List of Low‐Loss Ceramic Dielectric Materials and Their Properties

2017

Microwave Materials and Applications 2V Set

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AbbreviationsST = sintering temperature ( • C) r = relative permittivity , f = measurement frequency (GHz) f = coefficient of temperature variation of resonant frequency (ppm/ • C) No. = serial number Qf = quality factor frequency product (GHz)The table lists the key property data of microwave dielectric materials available from published materials. These data are the relative permittivity ( r ), the product of the Q-factor and the frequency (Qf ), the frequency of measurement (f), and the temperature coefficient of the resonant frequency ( f ). In tabulating these data, we make no judgment on the measurement method and the reliability of the result. It is known that the ceramic properties such as porosity, grain size, raw materials used, impurities, measurement methods, and equipment used for measurements affect the dielectric properties and readers should be aware that exact comparison of data on materials of identical composition and manufactured in different laboratories using different processing conditions and measured by different methods would be expected to lead to small variations in properties. The data of dielectric measurements carried out using impedance methods at low (MHz) frequency is excluded as the errors in these methods mean that a loss tangent less than 10 −3 is unreliable. The data are arranged in the order of increasing relative permittivity. The quality factor of the microwave dielectric ceramics decrease significantly with increasing relative permittivity, as shown in Figure A.1. The inset in the figure shows the variation of quality factor frequency product with Microwave Materials and Applications, First Edition. Edited by Mailadil T. Sebastian, Rick Ubic and Heli Jantunen.

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Morphology and microstructure of 2.5 dimension C/SiC composites ablated by oxyacetylene torch

Cited by 65 publications

References 16 publications

Fabrication and Ablation Studies of 4D C/SiC Composite Nozzle Under Liquid Propulsion

Fabrication and Ablation Studies of 4D C/SiC Composite Nozzle Under Liquid Propulsion

Microstructure and evolution of iridium coating on the C/C composites ablated by oxyacetylene torch

List of Low‐Loss Ceramic Dielectric Materials and Their Properties

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