Abstract: The present invention provides a method for producing an R-T-B-M sintered magnet having an oxygen content of less than 0.07 wt. % from R-T-B-M raw materials. The composition of R-T-B-M includes R being at least one element selected from a rare earth metal including Sc and Y. The composition also includes T being at least one element selected from Fe and Co. B in the composition is defined as Boron. The composition further includes M being at least one element selected from Ti, Ni, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Cu, Ga, Mo, W, and Ta. The present invention provides for a step of creating an inert gas environment in the steps of casting, milling, mixing, molding, heating, and aging to prevent the powder from reacting with the oxygen in anyone of the above mentioned steps.

Abstract: The present invention discloses an R-T-B-M-C sintered magnet and a method for manufacturing the R-T-B-M-C sintered magnet from an R-T-B-M-C alloy powder including the lubricant. The present invention also discloses an apparatus for manufacturing the R-T-B-M-C sintered magnet from the R-T-B-M-C alloy powder including the lubricant. The apparatus includes an alloy powder feeding mechanism for distributing the R-T-B-M-C alloy powder including the lubricant, a filling mechanism including a mold for receiving the R-T-B-M-C alloy powder including the lubricant, a press mechanism for compressing the R-T-B-M-C alloy powder including the lubricant and a stacking mechanism for storing the mold including the R-T-B-M-C alloy powder including the lubricant.