The influence of technological parameters of manufacture on quality of composite material with aluminium matrix reinforcement by carbon fibres
Aleksy Patejuk*, Michał Gabrylewski** *Politechnika Białostocka, Wydział Mechaniczny, ul. Wiejska 45C, 15-351 Białystok **COBRABID-BBC sp. z o.o., ul. Łucka 13, 00-842 Warszawa
Quarterly No. 3, 2005 pages 91-95
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abstract The results of researches of metal-matrix composites with aluminium matrix reinforced with carbon fibers has been presented. Two-stage method of manufacturing of those metal-matrix composites by free saturation of carbon fibers bundle has been discovered and presented by authors. It has been considered, that CuSn10Ti17 alloy complied with requirements of infiltration liquid used for saturation of porous structure of carbon fibers. It has been ascertained, that process of infiltration should be done in temperature about 1000oC and in range of time 1÷2 minutes. As a result of infiltration process has been made an intermediation layer. This layer is made of TiC, generally tensile strength of MMC is growing up together with increasing of fibers volume fraction (Fig. 4). Exchange of intermediation matrix (CuSn10Ti17 alloy) into a final, aluminum matrix should be done in temperature about 1000oC. Optimum time of forming is about 4 minutes. When this time is too short (about 2 minutes) intermediation matrix is flushed out from the space between carbon fibers what was confirmed by the results of linear chemical microanalysis of interface (Fig. 5). Increase of forming time to circa about 6 minutes makes a contribution to decrease of carbon fibers thickness. Key words: composite material, intermediate matrix-aloy SnCu10Ti17, final matrix-aluminum, reiforcement-carbon fibres, tensile strenght