Physical and strength properties of Fe/SiC composites under microwave hybrid sintering method
AbstractTwo different methods for the sintering of Fe/SiC composite prepared via uniaxial powder compaction are investigated in this work; the conventional furnace sintering and the microwave hybrid sintering methods. The important variables considered are the compositions of SiC in the Fe/SiC composite and the sintering temperatures used. The compositions of the SiC in the Fe/SiC used are 0, 10 and 20 wt. % and the sintering temperatures used are 1000Â°C, 1050Â°C, 1100Â°C and 1200Â°C. Damaged samples are obtained at the sintering temperatures of 1100Â°C and 1200Â°C for microwave hybrid method. For the undamaged samples obtained at 1000Â°C and 1050Â°C sintering temperatures, the physical and strength properties are studied. The physical properties of the sintered samples studied are the occurrence of shrinkage and swelling, the relative density and also their microstructure. The results show that the samples sintered under microwave hybrid process exhibit relatively higher shrinkage and swelling. The addition of SiC leads to the decrease in the relative densities of the sintered Fe/SiC samples. In addition, the tensile strengths of the Fe/SiC samples decrease with increasing SiC content. Microwave hybrid sintering produces relatively stronger samples by having relatively higher tensile strength values, especially for pure Fe and at 10 wt% SiC at 1050Â°C sintering temperature.
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