ELECTRODEPOSITION METHOD, BATH AND RARE EARTH PERMANENT MAGNET MATERIALS PREPARATION METHOD USING SAME

摘要

An electrodeposition method, bath and a method of preparing rare earth permanent magnet materials using the same. The electrodeposition method is used for depositing heavy rare earth elements on the surface of R²-T-B type sintered mother alloy, and the method comprises the following steps: Step 1, providing an electrodeposition liquid, wherein the electrodeposition bath comprises a main salt containing heavy rare earth elements, an inducing salt for inducing deposition of heavy rare earth elements and an organic ionic liquid as a solvent, wherein the main salt is a heavy rare earth tetrafluoroborate; Step 2, electroplating the R²-T-B type sintered mother alloy in the electrodeposition bath, and the temperature of the electroplating process is 0～200 ℃. The present invention has the advantages that the heavy rare earth element has a high deposition speed on the surface of the R²-T-B type sintered mother alloy, and can save time for the electrodeposition process and improve the production efficiency. The thicker coating thickness can reach 10-40μm.