JP2006165218A5

JP2006165218A5 -

Info

Publication number: JP2006165218A5
Application number: JP2004353619A
Authority: JP
Filing date: 2004-12-07
Publication date: 2006-12-21
Anticipated expiration: 2024-12-07

Description

即ち、本発明は、Ｒ−Ｔ−Ｍ−Ｂ（ＲはＹ及びＳｃを包含する希土類元素のうち少なくとも一種、ＴはＦｅ又はＦｅ及びＣｏ、ＭはＴｉ、Ｎｂ、Ａｌ、Ｖ、Ｍｎ、Ｓｎ、Ｃａ、Ｍｇ、Ｐｂ、Ｓｂ、Ｚｎ、Ｓｉ、Ｚｒ、Ｃｒ、Ｎｉ、Ｃｕ、Ｇａ、Ｍｏ、Ｗ、Ｔａから選ばれる少なくとも一種の元素であって、これらの含有量はそれぞれ５質量％≦Ｒ≦４０質量％、５０質量％≦Ｔ≦９０質量％、０質量％≦Ｍ≦８質量％、０．２質量％≦Ｂ≦８質量％である。）で表される希土類焼結磁石の表面にＦｅ、Ｃｏ、Ｎｉ、Ｓｎ、Ｃｕから選ばれる少なくとも一種からなる金属皮膜をメッキ法を用いて一層又は多層に形成した後、該磁石をＦｅ、Ｃｏ、Ｎｉ、Ｓｎ、Ｃｕから選ばれる少なくとも一種の金属と、燐酸二水素ナトリウム、燐酸二水素カリウム、燐酸水素二ナトリウム、燐酸水素二カリウムから選ばれる少なくとも一種の化合物と、硫酸、硝酸、酢酸、蓚酸、クエン酸、燐酸、ピロ燐酸、硫酸ナトリウム、硫酸カリウム、硝酸ナトリウム、硝酸カリウム、酢酸ナトリウム、酢酸カリウム、蓚酸カリウム、蓚酸ナトリウム、クエン酸ナトリウム、クエン酸カリウム、燐酸ナトリウム、燐酸カリウム、ピロ燐酸ナトリウム、ピロ燐酸カリウムから選ばれる少なくとも一種の化合物を含む水溶液に浸漬することを特徴とするＲ−Ｔ−Ｍ−Ｂ系希土類永久磁石の製造方法を提供する。また、本発明は、該方法によって得られ、希土類焼結磁石の表面に形成された金属皮膜の上記磁石表面に達する微細孔底部に対応する磁石表面上に、Ｆｅ、Ｃｏ、Ｎｉ、Ｓｎ、Ｃｕから選ばれる少なくとも一種の金属とその金属を含む燐化合物が堆積されてなるＲ−Ｔ−Ｍ−Ｂ系希土類永久磁石を提供する。 That is, the present invention is based on R-T-M-B (R is at least one of rare earth elements including Y and Sc, T is Fe or Fe and Co, M is Ti, Nb, Al, V, Mn, Sn. , Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Ni, Cu, Ga, Mo, W, Ta, and the content of each is 5% by mass ≦ R ≦ 40 mass%, 50 mass% ≦ T ≦ 90 mass%, 0 mass% ≦ M ≦ 8 mass%, 0.2 mass% ≦ B ≦ 8 mass%)) A metal film made of at least one selected from Fe, Co, Ni, Sn, and Cu is formed in a single layer or multiple layers using a plating method, and then the magnet is selected from at least one selected from Fe, Co, Ni, Sn, and Cu. Metals, sodium dihydrogen phosphate, potassium dihydrogen phosphate At least one compound selected from the group consisting of sodium phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, sulfuric acid, nitric acid, acetic acid, oxalic acid, citric acid, phosphoric acid, pyrophosphoric acid, sodium sulfate, potassium sulfate, sodium nitrate, potassium nitrate, sodium acetate, It is immersed in an aqueous solution containing at least one compound selected from potassium acetate, potassium oxalate, sodium oxalate, sodium citrate, potassium citrate, sodium phosphate, potassium phosphate, sodium pyrophosphate and potassium pyrophosphate, R- A method for producing a TMB-based rare earth permanent magnet is provided. In addition, the present invention provides Fe, Co, Ni, Sn, Cu on the magnet surface corresponding to the bottom of the fine hole reaching the magnet surface of the metal film formed by the method and formed on the surface of the rare earth sintered magnet. An R-T-MB-based rare earth permanent magnet in which at least one kind of metal selected from the above and a phosphorus compound containing the metal is deposited is provided.

本発明においては、このようにして得られた金属で被覆された磁石を、Ｆｅ、Ｃｏ、Ｎｉ、Ｓｎ、Ｃｕから選ばれる少なくとも一種の金属と、燐酸二水素ナトリウム、燐酸二水素カリウム、燐酸水素二ナトリウム、燐酸水素二カリウムから選ばれる少なくとも一種と、硫酸、硝酸、酢酸、蓚酸、クエン酸、燐酸、ピロ燐酸、硫酸ナトリウム、硫酸カリウム、硝酸ナトリウム、硝酸カリウム、酢酸ナトリウム、酢酸カリウム、蓚酸ナトリウム、蓚酸カリウム、クエン酸ナトリウム、クエン酸カリウム、燐酸ナトリウム、燐酸カリウム、ピロ燐酸ナトリウム、ピロ燐酸カリウムから選ばれる少なくとも一種を含む水溶液（処理液）に任意の温度と時間で浸漬する。 In the present invention, the magnet coated with the metal thus obtained is made of at least one metal selected from Fe, Co, Ni, Sn, and Cu, sodium dihydrogen phosphate, potassium dihydrogen phosphate, hydrogen phosphate. At least one selected from disodium, dipotassium hydrogen phosphate, sulfuric acid, nitric acid, acetic acid, oxalic acid, citric acid, phosphoric acid, pyrophosphoric acid, sodium sulfate, potassium sulfate, sodium nitrate, potassium nitrate, sodium acetate, potassium acetate, sodium oxalate, It is immersed in an aqueous solution (treatment liquid) containing at least one selected from potassium oxalate, sodium citrate, potassium citrate, sodium phosphate, potassium phosphate, sodium pyrophosphate, and potassium pyrophosphate at an arbitrary temperature and time.

Claims

R-TMB (R is at least one of rare earth elements including Y and Sc, T is Fe or Fe and Co, M is Ti, Nb, Al, V, Mn, Sn, Ca, Mg, Pb , Sb, Zn, Si, Zr, Cr, Ni, Cu, Ga, Mo, W, Ta, and their contents are 5% by mass ≦ R ≦ 40% by mass, 50%, respectively. Mass% ≦ T ≦ 90 mass%, 0 mass% ≦ M ≦ 8 mass%, 0.2 mass% ≦ B ≦ 8 mass%.) Fe, Co, Ni After forming a metal film made of at least one selected from Sn, Cu in a single layer or multiple layers using a plating method, the magnet is coated with at least one metal selected from Fe, Co, Ni, Sn, Cu and diphosphate. Sodium hydrogen, potassium dihydrogen phosphate, dihydrogen phosphate At least one compound selected from thorium, dipotassium hydrogen phosphate, sulfuric acid, nitric acid, acetic acid, oxalic acid, citric acid, phosphoric acid, pyrophosphoric acid, sodium sulfate, potassium sulfate, sodium nitrate, potassium nitrate, sodium acetate, potassium acetate, potassium oxalate R-T-MB which is immersed in an aqueous solution containing at least one compound selected from sodium oxalate, sodium citrate, potassium citrate, sodium phosphate, potassium phosphate, sodium pyrophosphate, and potassium pyrophosphate Of manufacturing rare earth permanent magnets.

The method for producing an R-T-MB-based rare earth permanent magnet according to claim 1, wherein the R-TMB-based rare earth permanent magnet is dipped in the aqueous solution according to claim 1, washed with water and dried.

Fe, Co, Ni, Sn, on the magnet surface corresponding to the bottom of the fine hole reaching the magnet surface of the metal film formed by the manufacturing method according to claim 1 or 2 and formed on the surface of the rare earth sintered magnet An RTMB-based rare earth permanent magnet in which at least one metal selected from Cu and a phosphorus compound containing the metal are deposited.