JPS639103A - Magnet - Google Patents
MagnetInfo
- Publication number
- JPS639103A JPS639103A JP15301286A JP15301286A JPS639103A JP S639103 A JPS639103 A JP S639103A JP 15301286 A JP15301286 A JP 15301286A JP 15301286 A JP15301286 A JP 15301286A JP S639103 A JPS639103 A JP S639103A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- rare earth
- resistance
- earth iron
- vol
- 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.)
- Pending
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052796 boron Inorganic materials 0.000 claims abstract 2
- 239000012535 impurity Substances 0.000 claims abstract 2
- 229910052727 yttrium Inorganic materials 0.000 claims abstract 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 235000019441 ethanol Nutrition 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、希土類鉄系磁石の表面処理に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to surface treatment of rare earth iron magnets.
この発明は、希土類鉄系磁石の表面上に、シリカカラス
の硬質皮膜をディップコーティング等ニより形成するこ
とにより、耐食性、耐薬品性、耐衝撃性、耐摩耗性にす
ぐれた高性能磁石を与えるものである。This invention provides a high-performance magnet with excellent corrosion resistance, chemical resistance, impact resistance, and abrasion resistance by forming a hard film of silica glass on the surface of a rare earth iron magnet using dip coating or other methods. It is something.
従来、高性ｉ［石として希土類磁石のうち、サマリウム
−コバルト系磁石が広く用いられていたが、コスト、磁
気特性の向上等を目的として、ネオジウム−鉄系磁石を
はじめとする希土類鉄系磁石が用いられる気運がある。Conventionally, among rare earth magnets, samarium-cobalt magnets have been widely used as high-quality I[stones]. There is a tendency for it to be used.
しかし１．希土類鉄系磁石は、サマリウム−コバルト系
磁石に比べ、耐食性、耐薬品性という点で劣り、変色、
ｔｉｌＦ等が生じやすく、何らかの表面処理を施す必
要があった。But 1. Rare earth iron magnets are inferior to samarium-cobalt magnets in terms of corrosion resistance and chemical resistance, and are prone to discoloration and
tilF etc. were likely to occur, and some kind of surface treatment was required.
希土類鉄系磁石は、磁気特性としては非常に良い特性を
有しているが、前述のように耐食性、耐薬品性に乏しく
、変色、請等を容易に生じてしまう欠点を有している。Rare earth iron magnets have very good magnetic properties, but as mentioned above, they have the disadvantage of poor corrosion resistance and chemical resistance, and easily cause discoloration, cracking, etc.
このため、表面処理等による表面保護が考えられている
が、耐薬品性に乏しいことから、酸又はアルカリの溶液
に基づく表面処理工程中において、希土類鉄系磁石表面
のみならず、磁石内部まで浸してしまうという状況で、
良好な湿式表面処理がなかった。また、ポリマー樹脂コ
ーティングによる被覆も考えられているが機械的な強度
に乏しいため、後加工等で、被覆欠陥を生じたり、機械
的な耐久性に乏しい、といった問題点があった。For this reason, surface protection through surface treatment has been considered, but due to poor chemical resistance, during the surface treatment process based on acid or alkali solutions, not only the surface of the rare earth iron magnet but also the inside of the magnet may be immersed. In a situation where
There was no good wet surface treatment. Furthermore, coating with a polymer resin coating has been considered, but this has problems such as poor mechanical strength, resulting in coating defects during post-processing, and poor mechanical durability.
上記の問題点を解決するため、緻密でかつ高硬度、高強
度な皮膜であるシリカガラス皮膜を希土類鉄系磁石表面
上に、ディップコーティング等により形成する。In order to solve the above problems, a silica glass film, which is a dense, high hardness, and high strength film, is formed on the surface of a rare earth iron magnet by dip coating or the like.
上記を行うに当たり、処理物である希土類鉄系磁石を、
アルコール等、有機溶剤主体の処理液にディッピングす
ることにより、酸又はアルカリの薬液に入れることなく
磁石表面の浸食を防止することができる。また、シリカ
ガラス皮膜は、硬度Ｈｖ、３５０程度有しており、表面
処理後の機械的強度も保つことができる。In carrying out the above, the rare earth iron-based magnet, which is the processed material, is
By dipping the magnet in a treatment liquid mainly consisting of an organic solvent such as alcohol, corrosion of the magnet surface can be prevented without putting it in an acid or alkaline chemical solution. Further, the silica glass film has a hardness Hv of about 350, and can maintain mechanical strength after surface treatment.
〔実施例〕
希土類鉄系磁石として最も一般的なネオジウム−鉄−ボ
ロン系の磁石用焼結合金から成形した電子時計用ロータ
を用いた場合について、実施例をあげる。[Example] An example will be described in which a rotor for an electronic watch is formed from a sintered alloy for neodymium-iron-boron magnets, which is the most common rare earth iron-based magnet.
まず、ロータをトリクロルエチレンにより脱脂洗浄する
０次いで、エアー吹き付は乾燥後、テトラナトキシシラ
ン２８容量％、エチルアルコール４７容量％、水２５容
量％から成る処理液中に、５分間浸漬し、次に引き上げ
て、３００℃５分間加熱してシリカガラス皮膜をロータ
表面上に形成した。First, the rotor is degreased and cleaned with trichlorethylene. After drying, the rotor is immersed for 5 minutes in a treatment solution consisting of 28% by volume of tetranatoxysilane, 47% by volume of ethyl alcohol, and 25% by volume of water. Next, the rotor was pulled up and heated at 300° C. for 5 minutes to form a silica glass film on the rotor surface.
このようにして得られたロータは、恒温恒温試験（４０
℃、湿度９５％の条件で１００時間放置）に対し、何ら
変色や錆を生じなく、良好な耐食性を示した。The rotor obtained in this way was subjected to a constant temperature constant temperature test (40
℃ and 95% humidity for 100 hours), no discoloration or rust occurred, and good corrosion resistance was exhibited.
また、このロータを、カナと組み合わせたところ、皮膜
のハクリ等の欠陥を示さなく、良好であった。Furthermore, when this rotor was combined with a pinion, it was found to be in good condition with no defects such as peeling of the film.
以上、実施例に述べたように、本発明によれば希土類鉄
系磁石の欠点である耐食性、耐薬品性の悪さをカバーで
き、高性能磁石の用途を拡げるものである。As described above in the Examples, the present invention can overcome the drawbacks of rare earth iron magnets, such as poor corrosion resistance and chemical resistance, and expand the applications of high-performance magnets.
なお、実施例において、希土類鉄系磁石の例として、ネ
オジウム−鉄−ボロン系磁石を用いたが他についても同
様の効果が期待できることは言うまでもない。また、シ
リカガラスコーティングをディンピングによる他、スプ
レー等による方法も同様である。In the examples, a neodymium-iron-boron magnet was used as an example of the rare earth iron magnet, but it goes without saying that similar effects can be expected with other magnets. In addition to dipping the silica glass coating, spraying or the like may also be used.
以上that's all
Claims (2)
したことを特徴とする磁石。(1) A magnet characterized by having a silica glass film formed on the surface of a rare earth iron magnet.
０％のＲ（ただしＲはイットリウムを含む希土類元素の
少なくとも一種）、２〜２８％のホウ素並びに、残部が
鉄及び不可避の不純物からなる特許請求の範囲第１項記
載の磁石。(2) The rare earth iron-based magnet has an atomic percentage of 8 to 3
The magnet according to claim 1, comprising 0% R (where R is at least one rare earth element including yttrium), 2 to 28% boron, and the balance iron and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15301286A JPS639103A (en) | 1986-06-30 | 1986-06-30 | Magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15301286A JPS639103A (en) | 1986-06-30 | 1986-06-30 | Magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS639103A true JPS639103A (en) | 1988-01-14 |
Family
ID=15553027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15301286A Pending JPS639103A (en) | 1986-06-30 | 1986-06-30 | Magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS639103A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0234749U (en) * | 1988-08-29 | 1990-03-06 | ||
| US5113835A (en) * | 1990-08-21 | 1992-05-19 | Honda Giken Kogyo K.K. (Honda Motor Co., Ltd. In English) | Method of controlling exhaust gas recirculation for an internal combustion engine |
-
1986
- 1986-06-30 JP JP15301286A patent/JPS639103A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0234749U (en) * | 1988-08-29 | 1990-03-06 | ||
| US5113835A (en) * | 1990-08-21 | 1992-05-19 | Honda Giken Kogyo K.K. (Honda Motor Co., Ltd. In English) | Method of controlling exhaust gas recirculation for an internal combustion engine |
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