Experimental And Computational Simulation For RTM Processing Of CMC

Ceramic matrix composites (CMC) materials display many attractive properties, such as high strength, high hardness, abrasion resistance, high temperature stability and anti corrosion, thus CMC materials are consider to be the next generation advanced materials. But the wildly application of CMC materials is restricted by the low efficiency and high cost of the conventionally fabrication process. The Resin Transfer Modeling (RTM) technique has high manufacture efficiency, good surface quality, and can be employed to fabricate the components with complex shapes. Because of such outstanding properties, RTM process is consider to be the leading forming technique applied in the composite material fabrication in the 21^st century. Hence, the research of the infiltration behavior of the resin in the fiber perform is important, especially for the development of precise forming RTM process for the low cost and advanced Silicon carbide matrix CMC materials manufacture.According to the development demands of high quality and low cost RTM manufacturing technology, the permeability of preform, processability of M-3193 unsaturated resin for Resin Transfer Molding and computer simulations of filling process were investigated systemically.(1) Regarding the RTM filling process as the Newton fluid through fibrous reinforcements, the permeability of preform determines the saturating of resin in fiber, and has effect on the curing process and the quality of products. Based on the Darcy's law, the theoretical model of permeability measurement was established. And the influence of major process parameters was investigated in details. It was found that the increasing injection pressure and flow rate could improve the permeability for the shorter filling time. At the last, the permeability of preform was measured through the experimental data.(2) In this paper, the processing property of M-3193 unsaturated polyester resin for Resin Transfer Molding is studied systematically. The effect of temperature, edge effect and SiC nm filler on resin liquidity and mechanical property of materials is analyzed. It is demonstrated that system of M-3193 unsaturated polyester resin maintains a viscosity well under 60mPas when the temperature is above 80℃ and large edge effect induces resin flow inadequate in fiber bundle, which reduced strength of composites. Besides, the hardness of composites increased 30%, and the strength of composites have no change when SiC nm filler is added. In another hand,...