JPH03188241A - Sintered permanent magnet material and its manufacture - Google Patents
Sintered permanent magnet material and its manufactureInfo
- Publication number
- JPH03188241A JPH03188241A JP32647989A JP32647989A JPH03188241A JP H03188241 A JPH03188241 A JP H03188241A JP 32647989 A JP32647989 A JP 32647989A JP 32647989 A JP32647989 A JP 32647989A JP H03188241 A JPH03188241 A JP H03188241A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- magnet material
- sintered permanent
- sintered
- rare earths
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 3
- 150000002367 halogens Chemical class 0.000 claims abstract description 3
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract 2
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract 2
- 229910052771 Terbium Inorganic materials 0.000 claims abstract 2
- 239000012535 impurity Substances 0.000 claims abstract 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims 3
- 229910045601 alloy Inorganic materials 0.000 claims 3
- 239000000843 powder Substances 0.000 claims 3
- 238000005245 sintering Methods 0.000 claims 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 229910052802 copper Inorganic materials 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910052794 bromium Inorganic materials 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 229910052731 fluorine Inorganic materials 0.000 abstract 1
- 229910052740 iodine Inorganic materials 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012776 electronic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
PURPOSE:To improve the corrosion resistance of a magnet without deteriorating its characteristics by forming the sintered permanent magnet material of specified at% of rare earths, Cu, Al, halogens, Fe and Co. CONSTITUTION:A sintered permanent magnet material is incorporated with, by atom, 13 to 16% rare earths, R. R denotes Pr, Nd, Dy, Tb and impurity rare earths, and they have the relationship in inequality I with one another. Furthermore, 6 to 9% B, 0.01 to 0.5% Cu, 0.1 to 2% Al and 0.01 to 1.0% X are incorporated thereto. X denotes at least one kind among F, Cl, Br and I. Moreover, 75.5 to 81% Fe and Co are incorporated thereto. Both have the relationship in inequality II. In this way, the deterioration of the deflective strength of a magnet when exposed to high temp. high humidity environments can be improved.
Description
【発明の詳細な説明】
利用産業分野
この発明は、高い磁石特性を有するＦｅ−Ｂ−Ｒ系焼結
永久磁石材料の耐食性を向上させた組成からなる焼結永
久磁石材料とその製造方法に係り、Ｃｕ、Ｍ、ハロゲン
元素を必須元素として、組成的に材料自体の耐食性を向
上させ、材料表面に設けた耐食性膜の耐剥離性を向上さ
せ、特に、厚みの薄い磁石材料の抗折力の低下を防止し
た高耐食性Ｆｅ−Ｂ−Ｒ系焼結永久磁石材料とその製造
方法に関する。Detailed Description of the Invention Field of Application This invention relates to a sintered permanent magnet material having a composition with improved corrosion resistance of a Fe-B-R based sintered permanent magnet material having high magnetic properties and a method for manufacturing the same. , Cu, M, and halogen elements as essential elements, the composition improves the corrosion resistance of the material itself, improves the peeling resistance of the corrosion-resistant film provided on the material surface, and particularly improves the transverse rupture strength of thin magnetic materials. The present invention relates to a highly corrosion-resistant Fe-BR-based sintered permanent magnet material that prevents deterioration, and a method for manufacturing the same.
背景技術
永久磁石材料は一般家庭の各種電器製品から、自動車や
逓信器部品、大型コンピューターの周辺端末機まで、幅
広い分野で使われる極めて重要な電気・電子材料の一つ
である。BACKGROUND TECHNOLOGY Permanent magnetic materials are one of the extremely important electrical and electronic materials used in a wide range of fields, from various household electrical appliances to automobiles, transmitter parts, and peripheral terminals for large computers.
近年の電気・電子機器の高性能化・小型化の要求に伴い
、永久磁石もまた高性能化が求められている。従来はこ
のような要求に応える永久磁石として希土類コバルト磁
石が知られていたが、希土類コバルト磁石は希土類とし
て、希土類鉱石中にあまり含まれておらず、高価なＳｍ
を多量に必要とし、またＣｏを５０〜６０ｗｔ％も必要
としていた。With the recent demand for higher performance and smaller size of electrical and electronic equipment, permanent magnets are also required to have higher performance. Conventionally, rare earth cobalt magnets have been known as permanent magnets that meet these demands, but rare earth cobalt magnets are rare earth elements that are not contained in large amounts in rare earth ores, and are expensive Sm
It required a large amount of Co, and 50 to 60 wt% of Co.
Claims (1)
まれる他の希土類であり、 ０．８≦（Ｐｒ＋Ｎｄ＋Ｄｙ＋Ｔｂ）／Ｒ≦１．０Ｂ６
ａｔ％〜９ａｔ％、 Ｃｕ０．０１ａｔ％〜０．５ａｔ％、Ａｌ０．１ａｔ％
〜２ａｔ％、Ｘ０．０１ａｔ％〜１．０ａｔ％、 但し、Ｘはハロゲン元素Ｆ、Ｃｌ、Ｂｒ、Ｉのうち少な
くとも１種 ＦｅおよびＣｏ７１．５ａｔ％〜８１ａｔ％但し、０≦
Ｃｏ／（Ｆｅ＋Ｃｏ）≦０．４ からなる焼結永久磁石材料。 ２ ハロゲン元素Ｘの８０％以上が、焼結体中のＮｄに富む
粒界析出相に含有されることを特徴とする請求項１記載
の焼結永久磁石材料。 ３ 合金粉末の粉砕時に、ＬｉＸの形でＸを添加し、得られ
た合金粉末を、磁界中で加圧、成形し、焼結して得られ
た焼結体を熱処理することを特徴とする請求項１または
２記載の焼結永久磁石材料の製造方法。 ４ 微粉砕を完了した合金粉末に、ＬｉＸの形でＸを添加混
合した後、磁界中で加圧、成形し、焼結して得られた焼
結体を熱処理することを特徴とする請求項１または２記
載の焼結永久磁石材料の製造方法。[Claims] 1 Rare earth R13 at% to 16 at%, provided that R is Pr, Nd, Dy, Tb, and other rare earths contained as impurities, and 0.8≦(Pr+Nd+Dy+Tb)/R≦1.0B6
at%~9at%, Cu0.01at%~0.5at%, Al0.1at%
~2at%,
A sintered permanent magnet material consisting of Co/(Fe+Co)≦0.4. 2. The sintered permanent magnet material according to claim 1, wherein 80% or more of the halogen element X is contained in an Nd-rich grain boundary precipitated phase in the sintered body. 3. Adding X in the form of LiX during pulverization of the alloy powder, pressurizing and shaping the obtained alloy powder in a magnetic field, and sintering the resulting sintered body is heat-treated. A method for producing a sintered permanent magnet material according to claim 1 or 2. 4. A claim characterized in that after adding and mixing X in the form of LiX to the alloy powder that has been pulverized, the sintered body obtained by pressurizing, molding, and sintering in a magnetic field is heat-treated. 2. A method for producing a sintered permanent magnet material according to 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326479A JP3009687B2 (en) | 1989-12-15 | 1989-12-15 | Manufacturing method of high corrosion resistant sintered permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326479A JP3009687B2 (en) | 1989-12-15 | 1989-12-15 | Manufacturing method of high corrosion resistant sintered permanent magnet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03188241A true JPH03188241A (en) | 1991-08-16 |
| JP3009687B2 JP3009687B2 (en) | 2000-02-14 |
Family
ID=18188273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1326479A Expired - Lifetime JP3009687B2 (en) | 1989-12-15 | 1989-12-15 | Manufacturing method of high corrosion resistant sintered permanent magnet material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3009687B2 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5480471A (en) * | 1994-04-29 | 1996-01-02 | Crucible Materials Corporation | Re-Fe-B magnets and manufacturing method for the same |
| WO2000006792A1 (en) * | 1998-07-29 | 2000-02-10 | Dowa Mining Co., Ltd. | Permanent magnetic alloy with excellent heat resistance and process for producing the same |
| US6319336B1 (en) | 1998-07-29 | 2001-11-20 | Dowa Mining Co., Ltd. | Permanent magnet alloy having improved heat resistance and process for production thereof |
| EP1712652A1 (en) * | 2004-06-22 | 2006-10-18 | Shin-Etsu Chemical Co., Ltd. | R-fe-b-based rare earth permanent magnet material |
| US7488395B2 (en) * | 2005-03-23 | 2009-02-10 | Shin-Etsu Chemical Co., Ltd. | Functionally graded rare earth permanent magnet |
| US7488394B2 (en) * | 2005-03-23 | 2009-02-10 | Shin-Etsu Chemical Co., Ltd. | Rare earth permanent magnet |
| US7488393B2 (en) * | 2005-03-23 | 2009-02-10 | Shin-Etsu Chemical Co., Ltd. | Rare earth permanent magnet |
| US7520941B2 (en) * | 2005-03-23 | 2009-04-21 | Shin-Etsu Chemical Co., Ltd. | Functionally graded rare earth permanent magnet |
| US7883587B2 (en) | 2006-11-17 | 2011-02-08 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet |
| US7955443B2 (en) | 2006-04-14 | 2011-06-07 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet material |
| US8211327B2 (en) | 2004-10-19 | 2012-07-03 | Shin-Etsu Chemical Co., Ltd. | Preparation of rare earth permanent magnet material |
| US8231740B2 (en) | 2006-04-14 | 2012-07-31 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet material |
| WO2013179337A1 (en) | 2012-05-30 | 2013-12-05 | 株式会社 日立製作所 | Sintered magnet and process for production thereof |
| WO2013186864A1 (en) | 2012-06-13 | 2013-12-19 | 株式会社 日立製作所 | Sintered magnet and production process therefor |
| CN109585110A (en) * | 2016-02-01 | 2019-04-05 | Tdk株式会社 | R-T-B system sintered magnet alloy and R-T-B system sintered magnet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62188746A (en) * | 1986-02-13 | 1987-08-18 | S C M:Kk | Permanent magnet material made of alloy containing fluorine |
| JPS63128606A (en) * | 1986-11-19 | 1988-06-01 | Asahi Chem Ind Co Ltd | Permanent magnet |
-
1989
- 1989-12-15 JP JP1326479A patent/JP3009687B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62188746A (en) * | 1986-02-13 | 1987-08-18 | S C M:Kk | Permanent magnet material made of alloy containing fluorine |
| JPS63128606A (en) * | 1986-11-19 | 1988-06-01 | Asahi Chem Ind Co Ltd | Permanent magnet |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5589009A (en) * | 1994-04-29 | 1996-12-31 | Crucible Materials Corporation | RE-Fe-B magnets and manufacturing method for the same |
| US5480471A (en) * | 1994-04-29 | 1996-01-02 | Crucible Materials Corporation | Re-Fe-B magnets and manufacturing method for the same |
| WO2000006792A1 (en) * | 1998-07-29 | 2000-02-10 | Dowa Mining Co., Ltd. | Permanent magnetic alloy with excellent heat resistance and process for producing the same |
| US6319336B1 (en) | 1998-07-29 | 2001-11-20 | Dowa Mining Co., Ltd. | Permanent magnet alloy having improved heat resistance and process for production thereof |
| EP1607491A1 (en) * | 1998-07-29 | 2005-12-21 | Dowa Mining Co., Ltd. | Permanent magnet alloy having improved heat resistance and process for production thereof |
| EP1712652A4 (en) * | 2004-06-22 | 2010-10-13 | Shinetsu Chemical Co | R-fe-b-based rare earth permanent magnet material |
| EP1712652A1 (en) * | 2004-06-22 | 2006-10-18 | Shin-Etsu Chemical Co., Ltd. | R-fe-b-based rare earth permanent magnet material |
| US8377233B2 (en) | 2004-10-19 | 2013-02-19 | Shin-Etsu Chemical Co., Ltd. | Preparation of rare earth permanent magnet material |
| US8211327B2 (en) | 2004-10-19 | 2012-07-03 | Shin-Etsu Chemical Co., Ltd. | Preparation of rare earth permanent magnet material |
| US7488393B2 (en) * | 2005-03-23 | 2009-02-10 | Shin-Etsu Chemical Co., Ltd. | Rare earth permanent magnet |
| US7520941B2 (en) * | 2005-03-23 | 2009-04-21 | Shin-Etsu Chemical Co., Ltd. | Functionally graded rare earth permanent magnet |
| US7488394B2 (en) * | 2005-03-23 | 2009-02-10 | Shin-Etsu Chemical Co., Ltd. | Rare earth permanent magnet |
| US7488395B2 (en) * | 2005-03-23 | 2009-02-10 | Shin-Etsu Chemical Co., Ltd. | Functionally graded rare earth permanent magnet |
| US7955443B2 (en) | 2006-04-14 | 2011-06-07 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet material |
| US8231740B2 (en) | 2006-04-14 | 2012-07-31 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet material |
| US7883587B2 (en) | 2006-11-17 | 2011-02-08 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet |
| WO2013179337A1 (en) | 2012-05-30 | 2013-12-05 | 株式会社 日立製作所 | Sintered magnet and process for production thereof |
| WO2013186864A1 (en) | 2012-06-13 | 2013-12-19 | 株式会社 日立製作所 | Sintered magnet and production process therefor |
| CN109585110A (en) * | 2016-02-01 | 2019-04-05 | Tdk株式会社 | R-T-B system sintered magnet alloy and R-T-B system sintered magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3009687B2 (en) | 2000-02-14 |
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