The use of the system Fe- (5,10,15,20)%Cu with the addition of 1% weight of silicon carbide (SiC) as bonding matrix for diamond tools was investigated in the present work. The diamond metallic composites were manufactured via conventional powder metallurgy and sintered at 1050 and 1150uC. Evaluation of the composites included the measurement of the level of shrinkage/ swelling, Brinell hardness and wear resistance. Microstructure was investigated via scanning electron microscopy (SEM). The results show that temperature of 1150uC presented the best sintering condition for the composites. Among the studied compositions, the alloy with 20%Cu content presented the best wear performance as metallic bonding matrix for diamond composites.
In this work, a study to process and characterize Fe-Cu alloys with reduced Co content is
shown. The Fe-Cu-Co alloys were processed by elemental blending of powders of the system Fe-
15%wtCu with various amounts of Co, pressing at 350MPa, and sintering at 1150°C/25min./10-2
mbar. The sintered microstructure was observed. It was conducted hardness and wear tests, aiming
to define the ideal Cu addition for future use in impregnated diamond tools. It was observed that
higher Co contents results in improved hardness and wear resistance in the studied Fe-Cu alloys.
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