JPS62163303A - Permanent magnet - Google Patents

Abstract

PURPOSE:To improve magnetic characteristic by adding B to an intermetallic compound of a rare earth metal and Co. CONSTITUTION:A permanent magnet consisting of the composition of R(Co1-XBX)A (where R represents at least one kind of rare earth metals, such as Ce, Pr, Nd, Sm, etc., and X and A satisfy 0.001<=X<=0.15 and 3<=A<=6) shows magnetic characteristics in which the residual magnetic flux density (Br), coercive force (Hc)s and maximum energy product (BH)MAX are excellent. The effect of the improvement of magnetic characteristics is reduced when B quantity (X) is less than 0.001 and exceeds 0.15, magnetic characteristics are deteriorated when a mole ratio A is less than 3, and Br is increased but Hc and (BH)MAX are lowered when the mole ratio exceeds 6.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、希土類合端（以下Ｒと記す）とＣｏの金属間
化合物、特にＲ＋Ｃｏｓ系永久磁石に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an intermetallic compound of a rare earth joint (hereinafter referred to as R) and Co, particularly to an R+Cos permanent magnet.

〔従来の技術〕[Conventional technology]

Ｒ＋Ｃｏａ系永久磁石の磁気特性の向上方法として各種
方法（例えは特公昭５６−１４７３１号、同５６−１４
７３６号、および同５６−４２１２２号の分轄参照）が
提案されている。Various methods are used to improve the magnetic properties of R+Coa permanent magnets (for example, Japanese Patent Publication No. 56-14731, No. 56-14)
No. 736 and No. 56-42122) have been proposed.

〔発明が解決シ１．ようとする間句点〕しかし、これら
従来の方法でのＲ＋Ｃｏｓ系永久磁石の磁気特性は低く
、世の中の要求には対応し難い問題点を有する。[The invention solves the problem.1. However, the magnetic properties of the R+Cos permanent magnets obtained by these conventional methods are low, and there is a problem that it is difficult to meet the demands of the world.

本発明は、上記従来技術の間四点を解消し、磁気特性の
優れた永久磁石を提供するものである。The present invention solves the four problems of the prior art described above and provides a permanent magnet with excellent magnetic properties.

〔間か８点を解決するだめの手段〕 本発明の永久磁石は、Ｒ（Ｃｏｔ−ＸＢＸ　）Ａ　（こ
こでＲは、Ｃｅ　＊　Ｐｒ　ｒ　Ｎｄ　＋　Ｓｍなどの
希土類元素の内、少くとも１種、０．００１≦Ｘ≦０．
１５．３≦Ａ≦６）の組成からなり、残留磁束密度（Ｂ
ｒ）、保磁力（Ｈａ）、および最大エネルギーＭ　（（
ＢＨ）ＭＡＸ　）の優れた磁気特性を有すことを特徴と
するものである。[Means to solve the problem 8] The permanent magnet of the present invention is R(Cot-XBX)A (here, R is at least one rare earth element such as Ce*PrNd+Sm). , 0.001≦X≦0.
15.3≦A≦6), and the residual magnetic flux density (B
r), coercive force (Ha), and maximum energy M ((
It is characterized by having excellent magnetic properties of BH)MAX).

すなわち、Ｂ（ポロン）を添加することにより本発明を
見出すに至ったのである。本発明での成分限定の理由を
述べると、下記の辿りである。すなわちＢ量（Ｘ）が、
０．０Ｃ１１未満および０．１５を越メると、磁気特性
の改善の効果が少なく、モル比Ａが３未満では、磁気特
性が低くなり、６を越えるとＢｒは高くなるものの、Ｈ
ｃおよび（ＢＨ）ＭＡＸが低下することによる。That is, the present invention was discovered by adding B (poron). The reasons for limiting the ingredients in the present invention are as follows. That is, the amount of B (X) is
If the molar ratio A is less than 0.0C11 or more than 0.15, the effect of improving magnetic properties will be small; if the molar ratio A is less than 3, the magnetic properties will be low; if it exceeds 6, Br will be high, but H
This is due to a decrease in c and (BH)MAX.

〔実施例〕〔Example〕

実施例１ Ｓｍ　（Ｃｏ　ｌ−ｘ　Ｂｘ　）　４．８　（但し、Ｘ
＝　Ｏ、Ｃ１，００５。Example 1 Sm (Col-x Bx) 4.8 (However, X
= O, C1,005.

０．０１　、０．１　、０．１８　）なる合金をアーク
溶解にて作成した。鞄成例を第１表に示す。得られたイ
ンゴットを粉砕し、平均粒径４．５μｍの微粉とし、磁
場強度８ＫＯｅ、成形圧４　ｔ／Ｆ！にてプレス成形し
、成形体を得た○成形体を）ｈガス雰囲気中にて、１１
１０℃ＸＩＨｒの焼結を行い、さらにＡｒガス雰囲気中
にて、９５０℃Ｘ　１　Ｈｒの保持後、８００℃ｔで、
１℃／分の速度で、徐冷し、８００℃からオイル中に急
冷処理を施し、磁気特性の評価に供した。結果を第１表
に示す。0.01, 0.1, 0.18) were prepared by arc melting. Examples of bag construction are shown in Table 1. The obtained ingot was crushed into fine powder with an average particle size of 4.5 μm, magnetic field strength was 8 KOe, and molding pressure was 4 t/F! Press molding was performed to obtain a molded product (○ molded product) in a gas atmosphere of 11
Sintering was performed at 10°C for 1 hour, and then held at 950°C for 1 hour in an Ar gas atmosphere, and then at 800°C for 1 hour.
It was slowly cooled at a rate of 1° C./min, and then quenched from 800° C. in oil to evaluate its magnetic properties. The results are shown in Table 1.

第　　　１　　　表 実施例（Ａ２，３．４）に見る如く、Ｂ添加により、磁
気特性の向上が認められる。しかし、Ｂ景が多すぎると
馬５のｐ口＜、特性が低下する。As seen in Example (A2, 3.4) in Table 1, the magnetic properties were improved by adding B. However, if there are too many B scenes, the p mouth characteristics of horse 5 will deteriorate.

実施例２゜ （Ｐｒｏ、ｓｓ　Ｎｄｏ、ｏｘ　Ｓｍｏ、＋２）　（Ｃ
ｏ　Ｉ−ｘ　Ｂｘ　）　４．８なる合金（ただし、ｘ＝
　ｏ　、　ｏ、ｏｓ　）について、焼結以外を実施例１
と同様に行い、その結果を第２表にＡ６゜７として示す
〇 ただし、焼結はＡｒガス雰囲気中で、１０８０℃×１　
Ｈｒとした。Example 2゜(Pro, ss Ndo, ox Smo, +2) (C
o I-x Bx ) 4.8 alloy (where x=
o, o, os), except for sintering Example 1
The results are shown in Table 2 as A6゜7〇However, sintering was performed at 1080℃ x 1 in an Ar gas atmosphere.
It was set as Hr.

実施例３゜ （Ｃｅ　００Ｉ１１３ｍｏ、ｓｓ　）　（Ｃｏ　１−ｘ
　Ｂｘ　）　４．１＋　　なる合金（ただし、Ｘ＝　０
　、　ｏ、ｏｓ　＞にて、実施例２と同様に行った結果
を第２表中、扁８，９として示す。Example 3゜(Ce 00I113mo, ss) (Co 1-x
Bx ) 4.1+ alloy (where X= 0
, o, os>, the results were carried out in the same manner as in Example 2, and are shown as flats 8 and 9 in Table 2.

第　　　２　　　表 実施例４゜ ＳｍＣｏｍＣ余人よびＳｍ　（Ｃｏｏ、９ｓ　Ｂｏ、ｏ
ｓ　）Ａ合金における異なるＡ値（Ａ＝２．８　、３．
３　、４．８　、５．７および６．３）の試料（Ａ　１
０〜１９　）について、焼結をＡｒカス雰吐気中にて、
１１４０℃Ｘ１Ｈｒとした以外実施例１と同様に行った
結果を第３表に示す。Table 2 Example 4゜SmComC and Sm (Coo, 9s Bo, o
s) Different A values in A alloys (A=2.8, 3.
3, 4.8, 5.7 and 6.3) samples (A 1
0 to 19), sintering was performed in an Ar gas atmosphere,
Table 3 shows the results of the same procedure as in Example 1 except that the temperature was 1140° C. for 1 hour.

第３表から、Ｂ添加による本発明の永久磁石が優れた磁
気特性を有すことが分る。From Table 3, it can be seen that the permanent magnet of the present invention with the addition of B has excellent magnetic properties.

第　　　３　　　表 〔発明の効果〕Table 3 〔Effect of the invention〕

Claims (1)

【特許請求の範囲】[Claims] 　Ｒ（Ｃｏ＿１＿−＿ＸＢ＿Ｘ）＿Ａ（ここでＲはＣｅ
、Ｐｒ、Ｎｄ、Ｓｍなどの希土類元素の内、少くとも１
種、０．００１≦Ｘ≦０．１５、３≦Ａ≦６）で示され
る組成からなることを特徴とする永久磁石。R(Co_1_−_XB_X)_A (where R is Ce
, at least one of rare earth elements such as Pr, Nd, and Sm.
1. A permanent magnet characterized by having a composition represented by the following formulas: species, 0.001≦X≦0.15, 3≦A≦6).