Composite microstructures, thermal

Processing conditions required to attain desirable composite properties can be defined more easily if the factors controlling composite microstructure are understood. Such factors include type of precursors employed and the composite s processing history. The microstructure of the matrix may contribute to the performance of the fibers and influence the properties of the composite. Reviewed are experiments to determine matrix micro-structural features, how microstructural variations are achieved, and ways in which thermal expansion and fracture behavior relate to microstructure. 

Combination of several properties is becoming increasingly important in modem industry. One example may be taken from electronics, where in addition to mechanical properties and electric resistance, themial stability and conductivity are important requirements. It was estimated that the increase of temperature by 10°C reduces time to failure by the factor of two." A finite analysis model was developed which accounts for the following properties of filled composites microstructure, effect of particle shape, formation of conductive chains, effect of filler aspect ratio, and interfacial thermal resistance. The predictions of the model indicate the most... 

The FGM concept offers an alternative method to design a part with a well defined, built-in stress state. By judiciously tailoring the composition and the microstructure, thermal stresses can be either dispersed or minimized during both the processing cycle and the in-service use. 

C. Labrugere, L. Guillaumat, A. Guette and R. Naslain, Mechanical and Microstructural Change in 0-90° SiC/MAS-L Composites after Thermal Ageing Vacuum, Ar and CO Atmosphere, J. Europ. Ceram. Soc. 19,... 

Cheng HM, Akiyama S, Kitahara A, Kobayashi K, Zhou BL, Behaviour of carbon-fiber reinforced Al-Si composites after thermal exposure. Mater Sci Technol, 8(3), 275-281, 1992. Friler JB, Argon AS, Cornie JA, Strength and toughness of carbon fiber reinforced aluminum matrix composites. Mater Sci Eng A—Structural Materials Properties Microstructure and... 

Ziegler G, Lucke J, Richter I, Suttor D, C-fibre reinforced composites with pol5nner-deiived matrix, microstructure, thermal properties, strength, Baxter J, Cot L, Fordham R, Gabis V, Hellot Y, Lefebvre M, Le Doussal H, Le Sech A, Naslain R, Sevagen A eds., European Ceramic Society, Euro Ceramics V, Part 3. Trans Tech Publications, Switzerland, 1870-1873, 1997 Key Eng Mater, 132-136. 

Jayanarayanan K, Jose T, Thomas S and Joseph K (2009) Effect of draw ratio on the microstructure, thermal, tensile and dynamic rheological properties of in situ microfibrillar composites, Eur Polym 745 1738-1747. 

Scheme 15.1, Figures 15.3, 15.5, 15.7 and 15.18-15.21 are adapted or reprinted from European Polymer Journal, Vol. 45,2009, Authors Jayanarayanan K, Jose T, Thomas S and Joseph K, Title Effect of draw ratio on the microstructure, thermal, tensile and d5mamic rheological properties of in situ microfibrillar composites, pp.1738-1747, Copyright (2009), with permission from Elsevier Ltd. 

Influences of thermal and plasma treatments on phase composition, microstructure and physical properties of the SnOx films deposited by sol-gel technique and magnetron sputtering... 

ETHYLENE/STYRENE COPOLYMERS MICROSTRUCTURES, THERMAL PROPERTIES, AND COMPOSITION ANALYSES... 

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