Silicon composite materials

Wang CS, Wu GT, Zhang XB, Qi ZF, Li WZ. Lithium insertion in carbon-silicon composite materials produced by mechanical milling. J Electrochem Soc 1998 145 2751-2758. 

Nguyen, T.P., Le Rendu, P., Lakehal, M.. Joubert, P., and Destruel, P. (2000) Poly(p-phen ene vinylene)/porous silicon composites. Materials Science Technology B, 69-70,177-181. 

Developments in metal-matrix composites technology has resulted in aluminum matrix materials filled with siUcon carbide [409-21 -2] SiC, (see Carbides, silicon carbide) particles (15 to 60 vol %) that provide the possibihty of weight reduction for brakes (20). These composite materials are being tested and evaluated. 

This comprises composite materials on mica, glass fibre and asbestos bases, impregnated or glued together with silicone resins or silicone elastomer. These materials must not contain any organic fibrous materials such as paper or cloth backing, which is covered under class B and even F insulation systems. 

The high-temperature stability of SiC-based ceramics is well-known, and therefore its composite materials have been investigated for application to high-tem-perature structural materials [19-21]. However, well-known SiC-based fibers and matrix-materials stained with alkali salt are easily oxidized at high temperatures in air [22]. This would be a serious problem when these materials are used near the ocean or in a combustion gas containing alkali elements. In particular, a silicon carbide fiber containing boron (a well-known sintering aid for SiC) over 1 wt% was extensively oxidized under the above condition. In this... 

Hybrid polymer silica nanocomposites formed from various combinations of silicon alkoxides and polymers to create a nanoscale admixture of silica and organic polymers constitute a class of composite materials with combined properties of polymers and ceramics. They are finding increasing applications in protective coatings (Figure 7.1), optical devices, photonics, sensors and catalysis.1... 

Wawner, F.E., Jr. (1988). Boron and silicon carbide/carbon fibers. In Fiber Reinforcements for Composite Materials (A.R. Bunsell cd.), Elsevier, Amsterdam, pp. 371-425. 

Access to phase pure silicon nitride materials via processable precursors is limited to just three approaches. The first, shown in reaction 6, provides one of the first oligomers exploited as a preceramic polymer24,253. This simple polysilazane, containing only Si, N and H, is known to be relatively unstable and will crosslink on its own to give intractable gels. Furthermore, it does not offer the 3Si I4N stoichiometry required for Si3N4. Nonetheless, it is useful as a binder and for fiber-reinforced ceramic matrix composites (CMCs)31. 

Klemm H, Herrmann M, Schubert C (1996) The Influence of the Grain Boundary Phase Composition on the High Temperature Properties of Silicon Nitride Materials. In Parilak L, Danninger H, Dusza J, Weiss B (eds) Proc Int Conf Deformation and Fracture in Structural PM Materials, IMR SAS Kosice 2 75... 

Balazsi, C., Konya, Z., Weber, F., Biro, L.P. and Arato, P., Preparation and characterization of carbon nanotube reinforced silicon nitride composites , Materials Science and Engineering, C Biomimetic and Supramolecular Systems, 2003, C23, 1133-1137. 

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