Influence of Carbon Fiber Treatment on Flexural Properties of C/SiC Composites

2018 ◽  
Vol 281 ◽  
pp. 408-413 ◽  
Author(s):  
Wei Jie Xie ◽  
Hai Peng Qiu ◽  
Ming Wei Chen ◽  
Shan Hua Liu
Keyword(s):  
Carbon Fiber ◽  
Flexural Strength ◽  
Carbon Fibers ◽  
Pyrolytic Carbon ◽  
Flexural Properties ◽  
Heat Treated ◽  
Fiber Treatment ◽  
Treated Carbon ◽  
Sic Composites ◽  
Polymer Impregnation

The purpose of this study was to investigate the influence of carbon fiber treatment on flexural properties of carbon fiber reinforced SiC matrix (C/SiC) composites. C/SiC composites were prepared by polymer impregnation pyrolysis (PIP) progress with polycarbosilane (PCS) as impregnant and carbon fiber as reinforcement. The flexural strength at room temperature of the 2D laminated composites were measured and analyzed with different carbon fiber treatment process. It was found that the flexural strength of the composites with carbon fibers coated by pyrolytic carbon was 53.5% higher than that with non-coated carbon fibers. The results also show that the flexural strength of the composites with 1600°C heat treated carbon fibers increased by 25.4% compared with the composites with non-heat treated fibers.

scholarly journals Influence of microfillers addition on the flexural properties of carbon fiber reinforced phenolic composites

2021 ◽  
pp. 002199832110316
Author(s):  
IA Abdulganiyu ◽  
INA Oguocha ◽  
AG Odeshi
Keyword(s):  
Carbon Fiber ◽  
Flexural Strength ◽  
Carbon Fibers ◽  
Colloidal Silica ◽  
Flexural Modulus ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Cfrp Composites ◽  
Sic Particles ◽  
Flexural Loading

The effects of microfiller addition on the flexural properties of carbon fiber reinforced phenolic (CFRP) matrix composites were investigated. The CFRP was produced using colloidal silica and silicon carbide (SiC) microfillers, 2 D woven carbon fibers, and two variants of phenolic resole (HRJ-15881 and SP-6877). The resins have the same phenol and solid content but differ in their viscosities and HCHO (formaldehyde) content. The weight fractions of microfillers incorporated into the phenolic matrix are 0.5 wt.%, 1 wt.%, 1.5 wt.%, and 2 wt.%. Flexural properties were determined using a three-point bending test and the damage evolution under flexural loading was investigated using optical and scanning electron microscopy. The results indicated that the reinforcement of phenolic resins with carbon fibers increased the flexural strength of the HRJ-15881 and SP-6877 by 508% and 909%, respectively. The flexural strength of the CFRP composites further increased with the addition of SiC particles up to 1 wt.% SiC but decreased with further increase in the amount of SiC particles. On the other hand, the flexural modulus of the CFRP composites generally decreased with the addition of SiC microfiller. Both the flexural strength and flexural modulus of the CFRP did not improve with the addition of colloidal silica particles. The decrease in flexural properties is caused by the agglomeration of the microfillers, with colloidal silica exhibiting more tendency for agglomeration than SiC. The fractured surfaces revealed fiber breakage, matrix cracking, and delamination under flexural loading. The tendency for failure worsened at microfiller addition of ≥1.5 wt.%.

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.

Effect of Sizing Removal Method and POSS Coating on Flexural Properties of Carbon Fiber Epoxy Composites

2013 ◽  
Author(s):  
Fariz Ibn Afzal ◽  
Mrinal C. Saha ◽  
M. Cengiz Altan
Keyword(s):  
Carbon Fiber ◽  
Flexural Strength ◽  
Epoxy Composites ◽  
Flexural Properties ◽  
Carbon Fiber Composites ◽  
Heat Treated ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Oligomeric Silsesquioxane ◽  
Carbon Fiber Epoxy

Effects of sizing and surface modification on flexural properties of carbon fiber reinforced epoxy composites have been investigated. Carbon fiber was desized using three types of treatments, namely heat, acetone, and acetone-acid. In addition, these fibers were coated with three different types of Polyhedral Oligomeric Silsesquioxane (POSS) molecule. Composite panels were fabricated using the vacuum assisted resin transfer molding and samples were tested in flexure. Scanning electron microscopy analysis was performed to investigate the surface morphology and failure mechanisms. It was found that removal of sizing significantly reduced the flexural strength. About 19% and 29% reduction of flexural strength was reported for acetone treatment and heat treatment, respectively. Composites with POSS coated fibers showed improved properties, except for the heat treated fibers. Among POSS molecules investigated, the S10455 was found to be the best for improving the flexural properties of carbon fiber composites.

Fabrication and Experimental Investigation on Tensile and Flexural Properties for Different Stacking Sequence of Jute and Carbon Fiber Reinforced Epoxy Composite

2020 ◽  
Vol 858 ◽  
pp. 72-77
Author(s):  
Abu Shaid Sujon ◽  
Tahamir Hasan Supto ◽  
Fahim Shariar ◽  
Md Mushfiqur Rahman Pallab ◽  
Mohammad Zoynal Abedin ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Carbon Fibers ◽  
Epoxy Composite ◽  
Flexural Properties ◽  
Stacking Sequence ◽  
Flexural Test ◽  
Resin Infusion

The consequence of placing a different layer of jute and carbon fiber in different position inside the composite has been experimentally investigated. Six layers of woven unidirectional jute fiber and four-layer of carbon fiber has been used with five different stacking sequences in this study. Vacuum Assisted Resin Infusion (VARI) technology has been used for the manufacturing of the composite. After analyzing the results of the tensile and flexural test of the composites, it shows that the stacking sequence has a significant effect on those properties of the composites. Tensile strength of the composites was upgraded when all the layers of carbon fiber were placed in the middle of the sandwich-like composite structure whereas flexural strength of the composites was improved when carbon fibers were placed on the compression and tension side of the composite.

Effects of Fiber Pre-Oxidation on Mechanical Properties and Microstructure of T700 Carbon Fiber Reinforced Mini C/SiC Composites

2017 ◽  
Vol 726 ◽  
pp. 137-142 ◽  
Author(s):  
Zhi Hua Chen ◽  
Si'an Chen ◽  
Jin Tai Wu ◽  
Hai Feng Hu ◽  
Yu Di Zhang
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced ◽  
Treated Carbon ◽  
Sic Composites

The reainforcement of T700 carbon fiber was oxidized at 400°C, as-received and treated carbon fiber reinforced mini Cf/SiC matrix composites were fabricated by precursor infiltration and pyrolysis (PIP) method. The mechanical properties of the composites were determined and compared. The results showed that with the time of oxidation increased, the flexural strength of composites decreased. The flexural modulus and tensile modulus were increased by the 87.8 GPa to 92.9 GPa and 131 GPa to 150 GPa. Without oxidation pretreatment, the composites represented maximum flexural strength of 649 MPa. For 1h oxidation, the composites reached the maximum tensile strength of 821 MPa. However, carbon fiber pre-oxidation for 2h, C/SiC composites mechanical properties appeared to reduce seriously.

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 Thermo-mechanical behavior of epoxy composite reinforced by carbon and Kevlar fiber

2018 ◽  
Vol 225 ◽  
pp. 01022
Author(s):  
Falak O. Abasi ◽  
Raghad U. Aabass
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Carbon Fibers ◽  
Epoxy Composites ◽  
Fiber Reinforced ◽  
Fiber Loading ◽  
Kevlar Fiber ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

Newer manufacturing techniques were invented and introduced during the last few decades; some of them were increasingly popular due to their enhanced advantages and ease of manufacturing over the conventional processes. Polymer composite material such as glass, carbon and Kevlar fiber reinforced composite are popular in high performance and light weight applications such as aerospace and automobile fields. This research has been done by reinforcing the matrix (epoxy) resin with two kinds of the reinforcement fibers. One weight fractions were used (20%) wt., Epoxy reinforced with chopped carbon fiber and second reinforcement was epoxy reinforced with hybrid reinforcements Kevlar fiber and improved one was the three laminates Kevlar fiber and chopped carbon fibers reinforced epoxy resin. After preparation of composite materials some of the mechanical properties have been studied. Four different fiber loading, i.e., 0 wt. %, 20wt. % CCF, 20wt. % SKF, AND 20wt. %CCF + 20wt. % SKF were taken for evaluating the above said properties. The thermal and mechanical properties, i.e., hardness load, impact strength, flexural strength (bending load), and thermal conductivity are determined to represent the behaviour of composite structures with that of fibers loading. The results show that with the increase in fiber loading the mechanical properties of carbon fiber reinforced epoxy composites increases as compared to short carbon fiber reinforced epoxy composites except in case of hardness, short carbon fiber reinforced composites shows better results. Similarly, flexural strength test, Impact test, and Brinell hardness test the results show the flexural strength, impact strength of the hybrid composites values were increased with existence of Kevlar fibers, while the hardness was decrease. But the reinforcement with carbon fibers increases the hardness and decreases other tests.

C/C-ZrB2-ZrC-SiC Composites Derived from Polymeric Precursor Infiltration and Pyrolysis Part I

2013 ◽  
pp. 413-434 ◽  
Author(s):  
Weigang Zhang ◽  
Changming Xie ◽  
Min Ge ◽  
Xi Wei
Keyword(s):  
Carbon Fiber ◽  
Interface Reaction ◽  
Fiber Surface ◽  
Pyrolytic Carbon ◽  
Polymeric Precursors ◽  
Ultra High Temperature Ceramics ◽  
Molar Ratios ◽  
Barrier Coating ◽  
Ceramic Precursors ◽  
Sic Composites

Two-dimensional C/C-ZrB2-ZrC-SiC composites with three phases of ultra high temperature ceramics (UHTCs) are fabricated for the first time using blending pre-ceramic polymeric precursors through the traditional polymer infiltration and pyrolysis (PIP) technique, in which a porous carbon fiber reinforced pyrolytic carbon (C/C) with a porosity of about 60% is prepared as preforms. The fabricated composite possesses a matrix of 20ZrB2-30ZrC-50SiC, which is obtained by co-pyrolysis of three pre-ceramic polymers solution in xylene with certain molar ratios. Pyrolysis of these ZrB2-ZrC-SiC pre-ceramic precursors is studied with XRD characterization of the residual solids. The gas phase products are analysized with an on-line GC-MS-FTIR coupling technique, which confirms the formation of crystalline ZrC and ZrB2 from these precursors at temperatures above 1400°C. Possible mechanisms of pyrolysis and formation of pure ZrB2 from the precursors with various B/Zr molar ratios are suggested. The densification process and microstructures of the fabricated composite are studied. It is found that a composite with a bulk density of 2.06 g/cm3 and open porosity of 9.6% can be obtained after 16 PIP cycles. The formed matrix exhibits homogeneous dispersion of three matrix ceramics without any oxide impurities, i.e., the nano sized ZrB2 and ZrC particles dispersed in a continuous SiC ceramic with clean crystalline boundaries and particle dimensions less than 200 nm. No erosion or interface reaction occurs upon the carbon fiber reinforcement, which therefore avoids a dramatic deterioration of mechanical strength of carbon fiber and the composite. Improvement of PIP benefits from two aspects; firstly, the dense pyrolytic carbon interphase deposited on fiber surface by CVI serves as barrier coating and secondly, pyrolysis of the novel organic polymeric precursors does not release corrosive by-products such as hydrogen chloride.

scholarly journals Microstructure and mechanical properties of short-carbon-fiber/Ti3SiC2 composites

2020 ◽  
Vol 9 (6) ◽  
pp. 716-725
Author(s):  
Guangqi He ◽  
Rongxiu Guo ◽  
Meishuan Li ◽  
Yang Yang ◽  
Linshan Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Carbon Fibers ◽  
Vickers Hardness ◽  
Matrix Composites ◽  
Transition Layers ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Short Carbon

AbstractShort-carbon-fibers (Csf) reinforced Ti3SiC2 matrix composites (Csf/Ti3SiC2, the Csf content was 0 vol%, 2 vol%, 5 vol%, and 10 vol%) were fabricated by spark plasma sintering (SPS) using Ti3SiC2 powders and Csf as starting materials at 1300 °C. The effects of Csf addition on the phase compositions, microstructures, and mechanical properties (including hardness, flexural strength (σf), and KIC) of Csf/Ti3SiC2 composites were investigated. The Csf, with bi-layered transition layers, i.e., TiC and SiC layers, were homogeneously distributed in the as-prepared Csf/Ti3SiC2 composites. With the increase of Csf content, the KIC of Csf/Ti3SiC2 composites increased, but the σf decreased, and the Vickers hardness decreased initially and then increased steadily when the Csf content was higher than 2 vol%. These changed performances (hardness, σf, and KIC) could be attributed to the introduction of Csf and the formation of stronger interfacial phases.

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.

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