Properties of SiC‐Si made via Binder Jet 3D Printing of SiC Powder, Carbon addition, and Silicon Melt Infiltration

2021 ◽  
Author(s):  
Corson L. Cramer ◽  
Amy M. Elliott ◽  
Edgar Lara‐Curzio ◽  
Alexis Flores‐Betancourt ◽  
Michael J. Lance ◽  
...  
Keyword(s):  
3D Printing ◽  
Carbon Addition ◽  
Silicon Melt ◽  
Melt Infiltration

Impact of silicon melt infiltration on the quality of cast crystalline silicon

Solar Energy ◽  
2021 ◽  
Vol 225 ◽  
pp. 569-576
Author(s):  
Qi Lei ◽  
Liang He ◽  
Changxin Tang ◽  
Shilong Liu ◽  
Lang Zhou
Keyword(s):  
Crystalline Silicon ◽  
Silicon Melt ◽  
Melt Infiltration

Fabrication and Testing of Corrugated 3D SiSiC Ceramics for Porous Burner Applications

2006 ◽  
Vol 45 ◽  
pp. 2316-2322 ◽  
Author(s):  
Jens Schmidt ◽  
Matthias Scheiffele ◽  
Alexander Mach ◽  
Franz von Issendorff
Keyword(s):  
Open Porosity ◽  
New Technology ◽  
Industrial Applications ◽  
Infiltration Process ◽  
Pure Silicon ◽  
Porous Burner ◽  
Wide Range ◽  
Silicon Melt ◽  
Melt Infiltration ◽  
Start Ups

Non-oxide SiC ceramics can withstand high temperatures ~1400 °C in severe combustion environments. Therefore such ceramics are interesting candidates for advanced combustion technologies, e.g. sophisticated porous burners. For the fabrication of porous SiSiC ceramics the DLR developed a new technology based on carbon sheets and lamellae. These basic materials can be combined to lightweight 3D C/C stacks. Through the variation of the amplitude and number of lamellae per inch, the open porosity and orientation of the pore channels could be tailored in a wide range. By using the pyrolysis followed by the liquid silicon-melt infiltration process the carbon stack could be directly converted into SiC in one shot. The residual open porosity can easily be filled with pure silicon to obtain 3D SiSiC structures with adequate mechanical strength and sufficient damage tolerance. Best results from durability tests were obtained with structures which are composed of oriented pore channels. Suitable structures should have angles (α) of about α = ± 60° or less. The results from burner rig tests at LSTM with improved components have been very promising, since a lifetime up to 500 hours and 2000 start-ups could be obtained with α = ± 50° as well as with α = ± 60° sample. So far, no significant oxidation or degradation could be observed after 1939 h/10800 start-ups with α = ± 45° sample. These proof tests are ongoing and show that these novel cardboard like structures have a high potential for industrial applications.

SiC Fiber Reinforced SiC-Si Matrix Composites Prepared by Melt Infiltration (MI) for Gas Turbine Engine Applications

1999 ◽  
Author(s):  
Gregory S. Corman ◽  
Milivoj K. Brun ◽  
Krishan L. Luthra
Keyword(s):  
Gas Turbine ◽  
Gas Turbine Engine ◽  
Matrix Cracking ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Turbine Engine ◽  
Sic Fiber ◽  
Silicon Melt ◽  
Melt Infiltration ◽  
Near Net Shape

General Electric (GE) has developed silicon carbide fiber reinforced SiC-Si matrix composites by silicon melt infiltration (MI) for use in gas turbine engine applications. This paper focuses on a process based on tow prepreging and lamination of unidirectional tapes. Silicon melt infiltration yields a fully dense, near net shape composite with a relatively high thermal conductivity, actually higher than many superalloys at temperatures up to 800°C, and a high proportional limit, or matrix cracking stress. Room and elevated temperature mechanical properties of the composite are presented. Following exposure to various simulated turbine environments this material shows relatively good retention of strength and toughness. The fabrication of turbine shroud and combustor liner components for high pressure combustion rig testing is also described.

Preparation and Morphology of C/C-SiC Composites by Si Melt Infiltration

2006 ◽  
Vol 317-318 ◽  
pp. 119-124
Author(s):  
In Sub Han ◽  
Doo Won Seo ◽  
Shi Woo Lee ◽  
Ki Seok Hong ◽  
Sang Kuk Woo ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Filament Winding ◽  
Mechanical And Thermal Properties ◽  
Fiber Preform ◽  
Silicon Melt ◽  
Different Types ◽  
Melt Infiltration ◽  
Infiltration Technique ◽  
Spun Fiber ◽  
Sic Composites

Two different types of carbon fibre bundles were used for filament winding to obtain C/C preforms. C/C-SiC composites were produced from the C/C preforms by a silicon melt infiltration technique. The effect of the type of carbon fibre bundle on the mechanical and thermal properties of the resultant C/C-SiC composites was compared. The spun fiber preform yields C/C-SiC composites of better mechanical properties than the unidirectional continuous fiber preform. The strength of the composites from the SFP was 1.8 times higher than that from the CFP. The flexural strength and the O-ring strength of the composites from the SFP with a density of 2.35 g/cm3 were about 160 MPa and 170 MPa, respectively.

Rig and Engine Testing of Melt Infiltrated Ceramic Composites for Combustor and Shroud Applications

2002 ◽  
Vol 124 (3) ◽  
pp. 459-464 ◽  
Author(s):  
G. S. Corman ◽  
A. J. Dean ◽  
S. Brabetz ◽  
M. K. Brun ◽  
K. L. Luthra ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Ceramic Composites ◽  
Gas Turbine Engine ◽  
Matrix Composites ◽  
Turbine Engine ◽  
Sic Fiber ◽  
Silicon Melt ◽  
Melt Infiltration ◽  
Engine Testing ◽  
Observed Damage

General Electric has developed SiC fiber-reinforced SiC-Si matrix composites produced by silicon melt infiltration for use in gas turbine engine applications. High temperature, high-pressure combustion rig testing, and engine testing has been performed on combustor liners and turbine shrouds made from such MI composites. Frame 5 sized combustor liners were rig tested under lean head end diffusion flame conditions for 150 hours, including 20 thermal trip cycles, with no observed damage to the ceramic liners. Similarly, 46-cm diameter, single-piece turbine shroud rings were fabricated and tested in a GE-2 gas turbine engine. The fabrication and testing of both components are described.

Effect of Initial Porosity on Mechanical Properties of C/SiC Composites Fabricated by Silicon Melt Infiltration Process

2004 ◽  
Vol 261-263 ◽  
pp. 1445-1450
Author(s):  
Dong Su Bae ◽  
Dong Young Son ◽  
Sang Ll Lee ◽  
Hong Sik Park ◽  
Kwang Soo Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Strength Test ◽  
Liquid Silicon ◽  
Initial Porosity ◽  
Infiltration Process ◽  
Microstructure Observation ◽  
Silicon Melt ◽  
Melt Infiltration ◽  
Sic Composites ◽  
Infiltration Behavior

Four kinds of raw C/C composites with a density between 1.25~1.66g/㎤ were used in order to investigate the effect of the initial porosity of C/C composites on mechanical properties of liquid silicon infiltrated C/SiC composites. The microstructure observation, image analysis and flexural strength test of the composites were performed. The density and microstructural changes with the variation of the initial porosity was discussed in the terms of the infiltration behavior of liquid silicon and the reaction between liquid silicon and matrix carbon.

scholarly journals Biomorphic Silicon Carbide from Malaysian Hardwood

2018 ◽  
Vol 7 (4.26) ◽  
pp. 257
Author(s):  
Noor Leha Abdul Rahman ◽  
Koay Mei Hyie ◽  
Anizah Kalam ◽  
Fauziah Md Yusof
Keyword(s):  
Silicon Carbide ◽  
Flexural Strength ◽  
Xrd Analysis ◽  
Inert Atmosphere ◽  
X Ray Diffraction ◽  
Infiltration Process ◽  
Silicon Melt ◽  
Melt Infiltration ◽  
Similar Density ◽  
Porous Sic

Porous silicon carbide with mimicking the original microstructure of wood are prepared by pyrolysis and subsequently impregnated with silicon by silicon melt infiltration. The infiltration process was performed at 1500 °C for 3 hours holding times in inert atmosphere. Two types of wood were used as precursor which is Kapur and dark red Meranti.The morphology of resulting porous SiC have been investigated using scanning electron microscope (SEM/EDX) and X-ray diffraction (XRD) analysis. The density of the samples was characterized by Archimedes methods. The excess of silicon was removed by etching with the mixture of hydrofluoric and nitric acid. The flexural strength was tested by the three-point flexural method at room temperature.It has been shown that the final SiC for both precursors have similar density. The existence of SiC was proved by the XRD result, whereas EDX analysis of silicon content revealed that the formation of silicon carbide in dark red Meranti is higher than that of Kapur. The flexural strength and modulus of dark red Meranti samples were much higher than those of the kapur samples because of higher formation of silicon carbide in dark red Meranti.  

Rig and Engine Testing of Melt Infiltrated Ceramic Composites for Combustor and Shroud Applications

2000 ◽  
Author(s):  
Gregory S. Corman ◽  
Anthony J. Dean ◽  
Stephen Brabetz ◽  
Milivoj K. Brun ◽  
Krishan L. Luthra ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Ceramic Composites ◽  
Gas Turbine Engine ◽  
Matrix Composites ◽  
Turbine Engine ◽  
Sic Fiber ◽  
Silicon Melt ◽  
Melt Infiltration ◽  
Engine Testing ◽  
Observed Damage

GE has developed SiC fiber reinforced SiC-Si matrix composites produced by silicon melt infiltration (MI) for use in gas turbine engine applications. High temperature, high pressure combustion rig testing and engine testing has been performed on combustor liners and turbine shrouds made from such MI composites. Frame 5 sized combustor liners were rig tested under LHE diffusion flame conditions for 150 hours, including 20 thermal trip cycles, with no observed damage to the ceramic liners. Similarly, 46 cm diameter, single piece turbine shroud rings were fabricated and tested in a PGT-2 gas turbine engine. The fabrication and testing of both components are described.

Biomorphic SiC Ceramics Prepared by Organic Template Method

2006 ◽  
Vol 317-318 ◽  
pp. 167-172
Author(s):  
Guan Jun Qiao ◽  
Zhi Hao Jin ◽  
Jun Min Qian
Keyword(s):  
Carbothermal Reduction ◽  
Reduction Reaction ◽  
Silica Sol ◽  
Sic Ceramics ◽  
Silicon Melt ◽  
Melt Infiltration ◽  
Porous Sic ◽  
Infiltration Method ◽  
Highly Porous ◽  
Carbothermal Reduction Reaction

Dense SiC/Si ceramics were prepared by a silicon melt infiltration method. Highly porous SiC ceramics with a wood-like microstructure were prepared by silica sol infiltration and carbothermal reduction reaction. Furthermore, laminated SiC/Si composites were also prepared by the carbonization and silicon melt infiltration of stacked papers. The microstructure and characteristics for this series of materials were determined and compared.

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