Magnetic materials based on rare earths (RTs) are essential in energy applications, in the production of permanent magnets used in wind turbines and electric vehicles. The most used method to produce permanent magnets is powder metallurgy. The production of TRs powder requires the use of a controlled atmosphere in its process (use of a glove box or inert gases), due to the high reactivity with oxygen of the material, causing the loss of desirable properties to the product. The solution obtained, with the aim of improving processing, is the addition of reduced graphene oxide (rGO) in the grinding stage of the material based on TRs, as they cover the particulate material, preventing oxidation, even in contact with the ambient atmosphere (oxygen). In this sense, the objective of this work is to obtain Nd-Fe-B magnets, using rGO during the milling process. In the manufacture of the magnets, three alloys were used: i) magnet1 - commercial “strip casting” alloy of Nd14,1B6,1Febal composition; ii) magnet2 – crude melting alloy – Pr16Fe66,9Co10,7B5,7Cu0,7 without addition of alloying elements; iii) magnet3 - crude fusion alloy rich in rare earth, nominal composition Nd13,0Dy7,5Cu1,0B5,6Febal. The sintering of the compacted powders was carried out in three steps: i) first heating at 593 K (10 K min-1), second heating at 973 K (10 K min-1) and, third, up to a maximum temperature of 1333 K (7 Kmin-1) for 1 hour. The magnet demagnetization curve2 showed the highest remanence (Br = 10.42 T) and the maximum energy product (BHmax = 21.19 MGOe), in addition to having the highest density (7135 kg m-3) when compared to with magnet1 and magnet3