Metal matrix composites models

Thermal expansion mismatch between the reinforcement and the matrix is an important consideration. Thermal mismatch is something that is difficult to avoid ia any composite, however, the overall thermal expansion characteristics of a composite can be controlled by controlling the proportion of reinforcement and matrix and the distribution of the reinforcement ia the matrix. Many models have been proposed to predict the coefficients of thermal expansion of composites, determine these coefficients experimentally, and analy2e the general thermal expansion characteristics of metal-matrix composites (29-33). 

B.Q. Han, K.C. Chan, T.M. Yue, and W.S. Lau, "A Theoretical Model for High-Strain-Rate Superplastic Behavior of Particulate Reinforced Metal Matrix Composites," Scr. Metall. Mater., 33 925 (1995). 

Gutowski, W. (1988). A thermodynamic model of the matrix-reinforcement interface Experimental verification. In Interfaces in Polymer. Ceramic and Metal Matrix Composites (Proc. ICCI-II) (H. Ishida ed.), Elsevier, New York, pp. 735-746. 

Craddock, J.N. and Savides. I.S. (1994). Modeling elastic-plastic behavior of metal matrix composites with reaction zones under longitudinal tension. Ini. J. Damage Mech. 3, 308-311. 

The 1-D concentric cylinder models described above have been extended to fiber-reinforced ceramics by Kervadec and Chermant,28,29 Adami,30 and Wu and Holmes 31 these analyses are similar in basic concept to the previous modeling efforts for metal matrix composites, but they incorporate the time-dependent nature of both fiber and matrix creep and, in some cases, interface creep. Further extension of the 1-D model to multiaxial stress states was made by Meyer et a/.,32-34 Wang et al.,35 and Wang and Chou.36 In the work by Meyer et al., 1-D fiber-composites under off-axis loading (with the loading direction at an angle to fiber axis) were analyzed with the... 

Finally, in chapter 6, another direction of applied electrochemistry is treated by Hovestad and Janssen Electroplating of Metal Matrix Composites by Codeposition of Suspended Particles. This is another area of metals materials-science where electroplating of a given metal is conducted in the presence of suspended particles, e.g. of A1203, BN, WC, SiC or TiC, which become electrodeposited as firmly bound occlusions. Such composite deposits have improved physical and electrochemical properties. Process parameters, and mechanisms and models of the codeposition processes are described in relation to bath... 

Suo Z. and Shih C. R, Models for Metal/Ceramic Interface Fracture, chap. 12 of Fundamentals of Metal-Matrix Composites, edited by S. Suresh, A. Mortensen and A. Needleman, Butterworth-Heinemann, Oxford England, 1993. 

Nunez-Lopez, C. A., Habazaki, H., Skeldon, P., Thompson, G. E., Karimzadeh, H., Lyon, P., and Wilks, T. E., An Investigation of Microgalvanic Corrosion Using a Model Magne-siiun-Silicon Carbide Metal Matrix Composite, Corrosion Science, Vol. 38, No. 10, 1996, pp. 1721-1729. 

Li, X.-G. (2014). Modeling and simulation of the gas-atomization process of metal melts for metal-matrix-composite production. Dissertation, University of Bremen, Shaker Verlag. ISBN 978-3-8440-3209-3. 

Li, X.-G., Heisteriiber, L., Achelis, L., Uhlenwinkel, V., Fritsching, U. (2011). Spray process modeling in metal-matrix-composite powder production. Atomization and Sprays, 27(11), 933-948. 

The fourth and last circuit (Fig. 7.25d) was proposed to describe the events which occur on a metallic corroding surface before and after localized corrosion has been observed. This model has been said to be in agreement with a large number of EIS data collected during the study of aluminum and aluminum-based metal matrix composites. The factor in this model attempts to represent the surface ratio... 

Boltzmann s constant, and T is tempeiatuie in kelvin. In general, the creep resistance of metal is improved by the incorporation of ceramic reinforcements. The steady-state creep rate as a function of appHed stress for silver matrix and tungsten fiber—silver matrix composites at 600°C is an example (Fig. 18) (52). The modeling of creep behavior of MMCs is compHcated because in the temperature regime where the metal matrix may be creeping, the ceramic reinforcement is likely to be deforming elastically. 

Ananth, C.R. and Chandra, N. (1995). Numerical modelling of fiber push-out test in metallic and intermetallic matrix composites mechanics of failure process. J. Composite Mater. 29, 1488-1514. 

This review is intended to focus on ceramic matrix composite materials. However, the creep models which exist and which will be discussed are generic in the sense that they can apply to materials with polymer, metal or ceramic matrices. Only a case-by-case distinction between linear and nonlinear behavior separates the materials into classes of response. The temperature-dependent issue of whether the fibers creep or do not creep permits further classification. Therefore, in the review of the models, it is more attractive to use a classification scheme which accords with the nature of the material response rather than one which identifies the materials per se. Thus, this review could apply to polymer, metal or ceramic matrix materials equally well. 

In the previous section it was shown that a generalized mechanism underlying particle incorporation in a metal matrix allows some insight into the effect of process parameters on the particle composite content. However, it is evident that a more elaborate mechanism is required to fully comprehend the processes involved. A detailed mechanism is also a prerequisite for the development of a mathematical model describing the particle codeposition behavior. Ideally, such a model should be able to predict the particle composite content from a given set of process parameters. This would facilitate screening composite types and optimization of process conditions for industrial applications. 

Ho CT, Chung DDL, Carbon fiber reinforced tin-superconductor composites, Bhagat RB, Clauer AH, Kumar P, Ritter AM eds., Minerals, Metals <6 Materials Society Metal Ceramic Matrix Composites, Processing, Modelling <6 Mechanical Behaviour, Minerals, Metals Materials Society Anaheim, 525-533, Feb 19-22, 1990. 

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