Online-Joining of C/SiC-C/SiC via Slurry Reaction and Precursor Infiltration and Pyrolysis Process with C/SiC Pins

2012 ◽  
Vol 531-532 ◽  
pp. 135-140 ◽  
Author(s):  
Yu Di Zhang ◽  
Hai Feng Hu ◽  
Chang Rui Zhang ◽  
Guang De Li
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Fracture Mode ◽  
Pyrolysis Process ◽  
Strong Bond ◽  
Sic Composites ◽  
Maximum Shear Strength ◽  
Application Prospects ◽  
Complex Components

C/SiC composites have widely application prospects in the field of aeronautic and aerospace for their excellent properties. The joining of C/SiC composites is a key to fabricate large and complex components. In this paper, 1D C/SiC pins were prepared by precursor infiltration and pyrolysis (PIP) process and used to join C/SiC composites by Slurry react (SR) and PIP process. The shear strength of the C/SiC pins with different carbon fiber volumes was investigated with the maximum shear strength as high as 339.46MPa. Influences of C/SiC pins on the joining properties of C/SiC composites were studied. The shear strength and flexural strength of C/SiC-C/SiC joining are improved from 9.17MPa and 30.41MPa without pins to 20.06MPa and 75.03MPa with one C/SiC pin (diameter 2mm), respectively. The reliability of C/SiC-C/SiC joining is also improved with C/SiC pins in that the fracture mode changes from catastrophic without pins to non-catastrophic. The SEM photos show a strong bond between joining layer and C/SiC composites without obvious interface.

scholarly journals Effect of Graphene Additive on Flexural and Interlaminar Shear Strength Properties of Carbon Fiber-Reinforced Polymer Composite

2020 ◽  
Vol 4 (4) ◽  
pp. 162
Author(s):  
Mohamed Ali Charfi ◽  
Ronan Mathieu ◽  
Jean-François Chatelain ◽  
Claudiane Ouellet-Plamondon ◽  
Gilbert Lebrun
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Interlaminar Shear Strength ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Adhesion Properties ◽  
Reinforced Polymer ◽  
Interlaminar Shear

Composite materials are widely used in various manufacturing fields from aeronautic and aerospace industries to the automotive industry. This is due to their outstanding mechanical properties with respect to their light weight. However, some studies showed that the major flaws of these materials are located at the fiber/matrix interface. Therefore, enhancing matrix adhesion properties could significantly improve the overall material characteristics. This study aims to analyze the effect of graphene particles on the adhesion properties of carbon fiber-reinforced polymer (CFRP) through interlaminar shear strength (ILSS) and flexural testing. Seven modified epoxy resins were prepared with different graphene contents. The CFRP laminates were next manufactured using a method that guarantees a repeatable and consistent fiber volume fraction with a low porosity level. Short beam shear and flexural tests were performed to compare the effect of graphene on the mechanical properties of the different laminates. It was found that 0.25 wt.% of graphene filler enhanced the flexural strength by 5%, whilst the higher concentrations (2 and 3 wt.%) decreased the flexural strength by about 7%. Regarding the ILSS, samples with low concentrations (0.25 and 0.5 wt.%) demonstrated a decent increase. Meanwhile, 3 wt.% slightly decreases the ILSS.

Preparation and Properties of 2D C/SiC Composites by CLVD Processing

2011 ◽  
Vol 675-677 ◽  
pp. 779-782 ◽  
Author(s):  
Si’an Chen ◽  
Hai Feng Hu ◽  
Chang Rui Zhang ◽  
Yu Di Zhang ◽  
Xin Bo He ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Flexural Strength ◽  
Induction Heating ◽  
Vapor Deposition ◽  
Flexural Modulus ◽  
Fiber Bundles ◽  
Xrd Pattern ◽  
Carbon Fiber Cloth ◽  
The Matrix ◽  
Sic Composites

Chemical liquid-vapor deposition (CLVD) process is a new style of fast densification, which combines the advantages of PIP process and CVI process. 2D C/SiC composites were prepared at 800~1200°C for 3~4 hours with liquid polycarbosilane and carbon fiber cloth by CLVD process with induction heating, and had the density of 1.7 g/cm3, the flexural strength of 84.6MPa, and the flexural modulus of 20GPa. XRD pattern of the sample proved that the matrix was β-SiC. It was found that SiC deposited mainly around single fiber instead of among fiber bundles and layers.

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Cf/SiC Composites

2007 ◽  
Vol 336-338 ◽  
pp. 1291-1293
Author(s):  
Xin Gui Zhou ◽  
Chang Cheng Zhou ◽  
Chang Rui Zhang ◽  
Ying Bin Cao ◽  
Shi Qin Zou
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Fracture Toughness ◽  
Silicon Carbide ◽  
Shear Strength ◽  
Carbon Fiber ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Carbon Coatings ◽  
Sic Composites

3D braided carbon fiber reinforced silicon carbide (3D-Cf/SiC) composites were fabricated by precursor infiltration and pyrolysis(PIP), with carbon coatings prepared by chemical vapor deposition (CVD) before PIP. The effect of 1873K heat treatment on the mechanical properties of Cf/SiC composites were investigated. The results showed that heat treatment before PIP can increase the density of composites and lead to excellent properties of Cf/SiC composites. The flexual strength of the Cf/SiC composites with one cycle of 1873 K heat treatment reached 571 MPa, shear strength 51 MPa, and fracture toughness 18 MPa⋅m1/2.

Flexural Properties of T700 2D Cf/SiC Composites via Precursor Infiltration and Pyrolysis

2015 ◽  
Vol 816 ◽  
pp. 152-156
Author(s):  
Xin Ma ◽  
Xin Bo He ◽  
Hai Feng Hu ◽  
Yu Di Zhang ◽  
Yong Li
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Rough Surface ◽  
Load Transfer ◽  
Flexural Modulus ◽  
Flexural Properties ◽  
Internal Defects ◽  
Plain Weave ◽  
Sic Composites

2D Cf/SiC composites were prepared by precursor infiltration and pyrolysis (PIP) process with spreaded T700-12K plain weave carbon clothes as the reinforcement. The mechanical properties and microstructures were investigated. The composites are compact with few internal defects since the precursor could infiltrate the preform effectively. CVD-PyC interface modified the surface of T700 carbon fiber, a rough surface is helpful for the interfacial combination and the load transfer. For the Cf/PyC/SiC composites, the flexural strength and flexural modulus were 425±23.2 MPa and 36.3±3.1 GPa, respectively.

Preparation and Properties of 2D Carbon Cloth Reinforced Ultra-High Temperature Ceramic Matrix Composites

2008 ◽  
Vol 368-372 ◽  
pp. 1050-1052 ◽  
Author(s):  
Yong Lian Zhou ◽  
Hai Feng Hu ◽  
Yu Di Zhang ◽  
Qi Kun Wang ◽  
Chang Rui Zhang
Keyword(s):  
High Temperature ◽  
Carbon Fiber ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Carbon Cloth ◽  
Matrix Composites ◽  
Pyrolysis Process ◽  
Sic Composites ◽  
Polymer Infiltration ◽  
Ultra High Temperature

In this paper the preparation of carbon fiber reinforced ultra-high temperature ceramic matrix composites was reported. Polymer infiltration and pyrolysis process was used to prepare 2D C/TaC-SiC, C/NbC-SiC, and C/ZrC-SiC composites. The fracture strengths of all the samples were around 300MPa and toughness around 10MPa-m1/2. Standard oxyacetylene torch tests (>3000°C, 30s) showed that the minimum ablative rate of 2D C/SiC-ZrC was as low as 0.026 mm/s, much smaller than that of 2D C/SiC composites (0.088mm/s).

Fabrication and Properties of Cf/SiC Composites Derived from Polysiloxane Precursor

2011 ◽  
Vol 686 ◽  
pp. 419-422
Author(s):  
Tian Heng Xu ◽  
Qing Song Ma ◽  
Zhao Hui Chen
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Elemental Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vacuum Atmosphere ◽  
The Matrix ◽  
Sic Composites

Carbon fiber reinforced silicon carbide composites (Cf/SiC) were derived through precursor infiltration pyrolysis route (PIP) at 1600°C in vacuum atmosphere using polysiloxane as precursor. The matrix of Cf/SiC was characterized by X-ray diffraction and elemental analysis. The results show that crystalline β-SiC can be derived at 1600°C in vacuum from polysiloxane. The flexural strength and fracture toughness of polysiloxane derived from Cf/SiC can reach up to 70 MPa and 2.3MPa·m respectively1/2.

Preparation and Properties of C/SiC Composites via Liquid Silicon Infiltration Process

2013 ◽  
Vol 750-752 ◽  
pp. 70-75 ◽  
Author(s):  
Guang De Li ◽  
Chang Rui Zhang ◽  
Hai Feng Hu ◽  
Yu Di Zhang
Keyword(s):  
Heat Treatment ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Carbon Coating ◽  
Liquid Silicon ◽  
Experimental Result ◽  
Infiltration Process ◽  
Carbon Fiber Felt ◽  
Porosity Ratio ◽  
Sic Composites

Three-dimensional short carbon fiber felt reinforced C/SiC composites were prepared by the liquid silicon infiltration (LSI) process. The influences of different porosity ratios, carbon coating, and heat treatment of C/C substrates, on the properties of C/SiC composites were studied. The optimized porosity ratio is calculated as 40.1% when the volume percent of carbon fiber (including carbon coating) is 23%, and after screening porosity ratio from ~55% to ~20%, the optimized experimental result (39.5%) is highly in accordance with the design value. The C/SiC composite after process parameter optimization, has a flexural strength and modulus of 125 MPa and 120 GPa, respectively. The C/SiC composite without carbon coating has a flexural strength of only 77 MPa, showing carbon coating plays a key role. The heat treatment of C/C substrate at 1600°C also improves the flexural strength of C/SiC composite for nearly 50%, and porosity rearrangement and interface weakening are believed to contribute such improvement.

Effects of Carbon Fiber Architecture on the Microstructure and Mechanical Property of C/C-SiC Composites

2010 ◽  
Vol 658 ◽  
pp. 133-136 ◽  
Author(s):  
Ji Ping Wang ◽  
Jian Yong Lou ◽  
Zhuo Xu ◽  
Zhi Hao Jin ◽  
Guan Jun Qiao
Keyword(s):  
Mechanical Property ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Thermal Gradient ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Fiber Architecture ◽  
Carbon Fiber Felt ◽  
Sic Composites ◽  
Microstructure And Mechanical Property

C/C-SiC composites were rapidly fabricated by a two-steps processing. Firstly a short-cut carbon fiber felt (SC) and a 2D carbon fiber felt (2D) were densified to C/C composites by a thermal gradient chemical vapor infiltration (CVI) method with vaporized kerosene as a precursor in 2h, 3h, 4h and 5h, respectively. Then the C/C composites were infiltrated and reacted with melting silicon to obtain C/C-SiC composites. The results show that, with increase of the CVI time, the densities of the two types of C/C-SiC composites decrease in the range of 2.28g/cm3 to 2.00g/cm3; their porosities increase ranging from 1.3% to 7.5%; the contents of the β-SiC and the unreacted Si phases in the composites decline. The flexural strength of the 2D_C/C-SiC composite is much higher than that of the SC_C/C-SiC composite when prepared in the same condition.

Mechanical Properties of C/SiC Composites via Precursor Pyrolysis with Pretreated Carbon Fiber

2007 ◽  
Vol 336-338 ◽  
pp. 1245-1247 ◽  
Author(s):  
Song Wang ◽  
Zhao Hui Chen ◽  
Fan Li ◽  
Hai Feng Hu
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Fracture Toughness ◽  
Carbon Fiber ◽  
Thermal Treatment ◽  
Carbon Coating ◽  
Pyrolytic Carbon ◽  
Pyrolysis Process ◽  
Sic Composites

3D C/SiC composites were fabricated by polycarbosilane (PCS) infiltration and pyrolysis process. The influence of pretreatment of carbon fiber, including pyrolytic carbon coating and thermal treatment, on mechanical properties of C/SiC composites was investigated. The results showed that the composites without fiber pretreatment had a flexural strength of 154MPa and a fracture toughness of 4.8 MPa•m1/2, while those with carbon coating or thermal treatment had much higher strength and toughness, that is, more than 400MPa and 15MPa•m1/2 respectively. Weak interfacial bonding and better in-situ strength of carbon fiber were main reasons for mechanical property improvement with pretreated carbon fiber.

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