Application of reaction sintering to the manufacturing of a spacecraft combustion chamber of SiC ceramics

Chen, M.H.; Gao, Li; Zhou, Jintang; Wang, M.

doi:10.1016/s0924-0136(02)00703-3

Cited by 29 publications

(11 citation statements)

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“…4, from the Weibull modulus plots of the flexure strength of the composite. Though the Si content in the composite infiltrated at 1,550°C is as high as 27 vol.% (21 wt%) and the microstructure is also not so homogeneous, the flexure strength of 450 ± 40 MPa is much higher than that of a regular reaction sintering SiC ceramics (362 MPa) which have a lower Si content of 20.5 vol% [28]. The value presented in this study is also higher than the value of 410 ± 30 MPa for the LSI-derived SiC ceramics, which only had residual Si of approximately 12 wt% [3].…”

Section: Resultsmentioning

confidence: 94%

A high-strength SiCw/SiC–Si composite derived from pyrolyzed rice husks by liquid silicon infiltration

et al. 2012

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A high-strength SiC composite with SiC whiskers (SiC w ) as reinforcement has been fabricated by liquid silicon infiltration (LSI) using pyrolyzed rice husks (RHs) as raw material. RHs were coked and pyrolyzed subsequently at high temperature to obtain a mixture containing SiC whiskers, particles, and amorphous carbon. The pyrolyzed RHs were then milled and modeled to preforms, which were then used to fabricate biomorphic SiC w /SiC-Si composites by liquid silicon infiltration at 1,450, 1,550, and 1,600°C, respectively. Dense composite with a density of 3.0 g cm -3 was obtained at the infiltration temperature of 1,550°C, which possesses superior mechanical properties compared with commercial reaction-sintered SiC (RS-SiC). The Vickers hardness, flexure strength, elastic modulus, and fracture toughness of the biomorphic SiC w /SiC-Si composite were 18.8 ± 0.6 GPa, 354 ± 2 GPa, 450 ± 40 MPa, and 3.5 ± 0.3 MPa m 1/2 , respectively. Whereas the composites obtained at the other two infiltration temperatures contain unreacted carbon and show lower mechanical properties. The high flexure strength of the biomorphic composite infiltrated at 1,550°C is attributed to the dense structure and the reinforcement of the SiC whiskers. In addition, the fracture mechanism of the composite is also discussed.

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Section: Resultsmentioning

confidence: 94%

A high-strength SiCw/SiC–Si composite derived from pyrolyzed rice husks by liquid silicon infiltration

et al. 2012

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“…It is widely used in water pumps, heat exchangers, bearings, and space telescopes [1,2]. It possesses excellent properties, such as oxidation resistance, high mechanical strength at elevated temperature, high hardness, high corrosion resistance, high thermal conductivity, and high thermal shock resistance [3][4][5][6]. However, SiC ceramics have grinding difficulties due to their hard and brittle features.…”

Section: Introductionmentioning

confidence: 99%

Electrical Discharge Machining of Silicon Carbide Ceramic of Plane Processing

2017

IJSR

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Silicon carbide (SiC) has high specific stiffness, high thermal conductivity, and a low thermal deformation coefficient, making it highly applicable in the aeronautic and astronautic industries. However, the beneficial properties of high hardness and high strength cause problems in shaping SiC blanks. Electrical discharge machining (EDM) is a popular unconventional machining process for producing hard and brittle materials. An experimental investigation was conducted on the improved technologies of EDM. A good surface was obtained through plane processing using graphite as an electrode.

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Section: Introductionmentioning

confidence: 99%

“…The dimensional variation of the final product prepared by LSI is small. Such a near-net shape feature makes LSI an effective method in producing SiC ceramic parts with none or less expensive post-machining (Chen et al 2002).In recent years, biological carbon-based precursors obtained via carbonisation of woods, bamboo coir, and cotton fabric have been investigated to fabricate SiC ceramics by LSI (Amirthan et al 2009;Maity et al 2010;Varela-Feria et al 2008). Different from these biological plant materials, rice husks (RHs) are commonly used in low-value applications in agriculture such as fuel, or otherwise simply disposed as wastes.…”

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confidence: 99%

Fabrication and Mechanical Properties of SiCw(p)/SiC-Si Composites by Liquid Si Infiltration using Pyrolysed Rice Husks and SiC Powders as Precursors

et al. 2014

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Dense silicon carbide (SiC) matrix composites with SiC whiskers and particles as reinforcement were prepared by infiltrating molten Si at 1550 °C into porous preforms composed of pyrolysed rice husks (RHs) and extra added SiC powder in different ratios. The Vickers hardness of the composites showed an increase from 18.6 to 21.3 GPa when the amount of SiC added in the preforms was 20% (w/w), and then decreased to 17.3 GPa with the increase of SiC added in the preforms up to 80% (w/w). The values of flexural strength of the composites initially decreased when 20% (w/w) SiC was added in the preform and then increased to 587 MPa when the SiC concentration reached 80% (w/w). The refinement of SiC particle sizes and the improvement of the microstructure in particle distribution of the composites due to the addition of external SiC played an effective role in improving the mechanical properties of the composites. Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China; b: Zhejiang Light-Tough Composite Materials Co., Ltd. Hangzhou, 310027, P. R. China; * Corresponding author: gaomx@zju.edu.cn (M. Gao); Tel. /Fax: +86-571-87952615 Keywords: SiC ceramics matrix composites; Rice husks; Liquid Si infiltration; Mechanical properties Contact information: a: State Key Laboratory of Silicon Materials & Department of Materials INTRODUCTIONSilicon carbide (SiC) ceramic matrix composites are widely used in structural, nuclear, and semiconductor applications due to their outstanding mechanical, thermal, and electrical properties (Amirthan et al. 2009;Chakrabarti et al. 2005;Wang et al. 2004). Liquid silicon infiltration (LSI), in which liquid Si infiltrates into porous preforms composed of carbon or mixtures of carbon and SiC powders, is a promising method to fabricate SiC ceramics. The process of infiltration results in formation of newly formed SiC grains by the reaction of Si with carbon. LSI is a simple fabrication technology that can fabricate dense SiC ceramics in a short time at a comparatively low temperature (Margiotta et al. 2010;Wang et al. 2004). The dimensional variation of the final product prepared by LSI is small. Such a near-net shape feature makes LSI an effective method in producing SiC ceramic parts with none or less expensive post-machining (Chen et al. 2002).In recent years, biological carbon-based precursors obtained via carbonisation of woods, bamboo coir, and cotton fabric have been investigated to fabricate SiC ceramics by LSI (Amirthan et al. 2009;Maity et al. 2010;Varela-Feria et al. 2008). Different from these biological plant materials, rice husks (RHs) are commonly used in low-value applications in agriculture such as fuel, or otherwise simply disposed as wastes. Pollution PEER-REVIEWED ARTICLE bioresources.com Zhu et al. (2014). "Si-C composites from rice husk," BioResources 9(2), 2572-2583. 2573is usually a result of the disposal process (Ramasamy et al. 2013;Sun and Gong 2001). These applications ignore the potential of RHs as a SiC source, for they have high content of ...

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Application of reaction sintering to the manufacturing of a spacecraft combustion chamber of SiC ceramics

Cited by 29 publications

References 0 publications

A high-strength SiCw/SiC–Si composite derived from pyrolyzed rice husks by liquid silicon infiltration

A high-strength SiCw/SiC–Si composite derived from pyrolyzed rice husks by liquid silicon infiltration

Electrical Discharge Machining of Silicon Carbide Ceramic of Plane Processing

Fabrication and Mechanical Properties of SiCw(p)/SiC-Si Composites by Liquid Si Infiltration using Pyrolysed Rice Husks and SiC Powders as Precursors

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