scholarly journals Electron Microscopy and Microanalysis of the Fiber–Matrix Interface in Monolithic Silicone Carbide-Based Ceramic Composite Material for Use in a Fusion Reactor Application

Scanning ◽  
2008 ◽  
Vol 30 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Tea Toplisek ◽  
Goran Drazic ◽  
Sasa Novak ◽  
Spomenka Kobe
Keyword(s):  
Electron Microscopy ◽  
Composite Material ◽  
Ceramic Composite ◽  
Fusion Reactor ◽  
Matrix Interface ◽  
Ceramic Composite Material ◽  
Fiber Matrix Interface ◽  
Fiber Matrix ◽  
Reactor Application ◽  
Silicone Carbide

Microstructural Characterization of Al2O3/Gamma Titanium Aluminide Composites

1992 ◽  
Vol 273 ◽  
Author(s):  
G. Das ◽  
S. Krishnamurthy
Keyword(s):  
Electron Microscopy ◽  
Titanium Aluminide ◽  
Hot Isostatic Pressing ◽  
Microstructural Characterization ◽  
Matrix Interface ◽  
Gamma Titanium Aluminide ◽  
Gamma Titanium ◽  
Matrix Microstructure ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

ABSTRACTAlumina (A12O3) fibers were incorporated into gamma titanium aluminide(TiAl) based powders by hot isostatic pressing (HIP'ing). The microstructure of as-HIP'd and heat treated composite specimens were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM studies reveal the presence of an amorphous reaction zone at the fiber/matrix interface. Numerous dislocations, dipoles and loops as well as twins are observed in A12O3 fibers. In addition, it is determined that the fiber/matrix interface stability is significantly affected by the matrix microstructure.

Numerical Test Method for Random Chopped Fiber Composites

2010 ◽  
Author(s):  
Yi Pan ◽  
Assimina A. Pelegri
Keyword(s):  
Composite Material ◽  
Cohesive Zone Model ◽  
Hydrostatic Stress ◽  
Numerical Test ◽  
Test Method ◽  
Zone Model ◽  
Matrix Interface ◽  
Material Constants ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

A two-scale approach for numerical determination of composite material constants using a finite element model is developed. A representative volume element is numerically generated using a modified sequential adsorption algorithm. To determine the strength of the composite material, progressive material degradation models are adopted for the matrix, fiber and the fiber/matrix interface. The epoxy resin is modeled with a modified von Mises criterion in which the effect of hydrostatic stress on yield is accounted for. The resin’s elastic constants degrade with increasing loading application. The glass fiber is modeled as an isotropic material whose failure is governed by the maximum strain criterion. A traction-separation type cohesive zone model is applied at the fiber/matrix interface. Validation of the presented model is achieved by comparing numerical simulations with experimental data. The effective material constants that have been homogenized by the numerical test approach can be applied for future structural analysis.

The Influence of Heat Treatment upon Fiber Pull-Out in a Ceramic Composite

1988 ◽  
Vol 120 ◽  
Author(s):  
M. D. Thouless ◽  
O. Sbaizero ◽  
E. Bischoff ◽  
E. Y. Luh
Keyword(s):  
Ceramic Composite ◽  
Ceramic Matrix Composites ◽  
Matrix Composites ◽  
Matrix Interface ◽  
Shear Lag ◽  
Weibull Statistics ◽  
Pull Out ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

AbstractThe toughness of ceramic-matrix composites is strongly influenced by fiber pull-out. The extent of the pull-out depends upon the properties of the fiber and the fiber/matrix interface. Samples of a SiC/LAS composite were subjected to different heat treatments in order to systematically vary these properties. The predicted distribution of the fiber pull-out lengths was calculated by combining a shear lag analysis with Weibull statistics for the fiber strengths. Comparison of the analysis with experiments and microstructural observations contribute to an understanding of the role of the fiber/matrix interface upon the mechanical properties.

Simulation by a Genetic Algorithm and Location by the Non-linear Acoustic Technique of the Shear Damage to the Fiber-Matrix Interface of a Hybrid Composite Material Alfa-Carbon / Epoxy

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
B. Doumi ◽  
A. Mokaddem ◽  
N. Benrekaa ◽  
M. Alami ◽  
N. Beldjoudi ◽  
...  
Keyword(s):  
Composite Material ◽  
Hybrid Composite ◽  
Actual Behavior ◽  
Matrix Interface ◽  
Shear Damage ◽  
Acoustic Technique ◽  
Hybrid Composite Material ◽  
Non Linear ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

AbstractThe objective of this paper is to study the location of the shear damage to the fiber matrix interface of a hybrid composite material by using the nonlinear acoustic technique, which is commonly described by the addition of a non-linear term in Hooke’s law. The genetic simulation is based on the probabilistic Weibull model including non-linear parameter β. The results obtained show good agreement between the numerical simulation and the actual behavior of two hybrid composite materials: alfa-carbon/Epoxy and glass-carbon/ Epoxy. In addition the results are similar to those obtained by the analytical model, which based on the Cox and Weibull formalism. The extended study for nanocomposite materials is interesting in the future.

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