JPH08153441A - Manufacture of oxide dispersed electric contact material - Google Patents
Manufacture of oxide dispersed electric contact materialInfo
- Publication number
- JPH08153441A JPH08153441A JP6317534A JP31753494A JPH08153441A JP H08153441 A JPH08153441 A JP H08153441A JP 6317534 A JP6317534 A JP 6317534A JP 31753494 A JP31753494 A JP 31753494A JP H08153441 A JPH08153441 A JP H08153441A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- fine
- oxide
- contact material
- oxidized
- 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
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Switches (AREA)
- Contacts (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気接点材料の製造方
法に係り、特に微細な酸化物粒子を均一に分散させるの
に好適な電気接点材料の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an electric contact material, and more particularly to a method for producing an electric contact material suitable for uniformly dispersing fine oxide particles.
【０００２】[0002]
【従来の技術】従来、酸化物分散電気接点材料を作るに
は、例えばＡｇ−Ｃｕ−Ｎｉ等のような合金を作り、そ
の後内部酸化していた。しかし、この内部酸化法では、
濃度の差や酸化の差が残り、酸化物が均一微細に分散し
なかった。また、各元素及び酸化した元素を混合焼結し
て作っても、酸化物が凝集、偏析してしまう為、均一微
細な分散とならなかった。さらに、選択的に限られた元
素のみの酸化物分散ができなかった。その上、Ａｌ等低
融点の金属は、溶融して合金させようとすると、高温の
為、蒸発してしまう。2. Description of the Related Art Conventionally, in order to manufacture an oxide-dispersed electrical contact material, for example, an alloy such as Ag--Cu--Ni was prepared and then internally oxidized. However, with this internal oxidation method,
The difference in concentration and the difference in oxidation remained, and the oxide was not uniformly and finely dispersed. Further, even if each element and the oxidized element are mixed and sintered, the oxide is agglomerated and segregated, so that uniform and fine dispersion is not obtained. Furthermore, it was not possible to selectively disperse oxides of only limited elements. In addition, a metal having a low melting point such as Al evaporates when it is melted and alloyed, because of its high temperature.
【０００３】[0003]
【発明が解決しようとする課題】そこで本発明は、微細
な酸化物粒子を接点材料である合金に均一に分散させる
ことのできる酸化物分散電気接点材料の製造方法を提供
しようとするものである。SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a method for producing an oxide-dispersed electrical contact material capable of uniformly dispersing fine oxide particles in an alloy which is a contact material. .
【０００４】上記課題を解決するための本発明の酸化物
分散電気接点材料の製造方法は、酸化したい元素を、ベ
ースとなる微細な合金粉末又はその合金と同様の成分組
成の金属粉末を混合した混合粉末に化学的に含浸させ、
次に酸化したい元素を含浸させた微細な合金粉末又は混
合粉末を酸化させ、次いで焼結することを特徴とするも
のである。ベースとなる微細な合金粉末又はその合金と
同様の成分組成となる微細な金属粉末を混合した混合粉
末に、酸化したい元素の化合物の水溶液を含浸させ、次
に洗浄して乾燥させ、還元雰囲気中で還元処理し、ベー
スとなる微細の粉末の表面に酸化したい元素を担持さ
せ、次に大気又は酸素雰囲気中で酸化処理を行なって微
細粉末の表面に酸化物を形成し、次いでこの微細粉末を
焼結することを特徴とするものである。上記の酸化した
い元素としては、Ａｌ、Ｓｉ、Ｚｒ、Ｔｉ、Ｍｇのいず
れかである。In the method for producing an oxide-dispersed electrical contact material of the present invention for solving the above problems, an element to be oxidized is mixed with a fine alloy powder serving as a base or a metal powder having the same composition as the alloy. Chemically impregnate mixed powder,
Next, the fine alloy powder or mixed powder impregnated with the element to be oxidized is oxidized and then sintered. In the reducing atmosphere, a fine alloy powder as a base or a mixed powder in which a fine metal powder having the same composition as the alloy is mixed is impregnated with an aqueous solution of a compound of an element to be oxidized, and then washed and dried. The surface of the fine powder that becomes the base is loaded with an element to be oxidized, and then an oxidation treatment is performed in the air or an oxygen atmosphere to form an oxide on the surface of the fine powder. It is characterized by being sintered. The element to be oxidized is any one of Al, Si, Zr, Ti and Mg.
【０００５】また酸化したい元素の化合物は特に限定さ
れるものではないが、加熱後の不純イオンの残留を少な
くするため、塩化物、硝酸塩などが好ましい。また、ベ
ースとなる微細な合金粉末又は混合粉末に対する酸化し
たい元素の割合は10乃至1000ppm が好ましい。10ppm 未
満では酸化物分散電気接点材料としての効果なしという
問題があり、また1000ppm を越えると、接点材として抵
抗増加およびもろくなるという問題があり好ましくな
い。還元処理を行なうとき、 300℃乃至 600℃の温度を
かけるのが好ましい。 300℃未満では還元反応が行なわ
れにくく、また 600℃を越えると粉末が焼結してしまう
という問題が起こる。また、ベースとなる微細な合金粉
末又は混合粉末の成分は、Ａｇ−Ｃｕ系であることが好
ましい。The compound of the element to be oxidized is not particularly limited, but chlorides, nitrates and the like are preferable in order to reduce the impurities remaining after heating. The ratio of the element to be oxidized to the fine alloy powder or the mixed powder as the base is preferably 10 to 1000 ppm. If it is less than 10 ppm, there is a problem that it is not effective as an oxide-dispersed electrical contact material, and if it exceeds 1000 ppm, there is a problem that resistance increases and becomes brittle as a contact material, which is not preferable. When carrying out the reduction treatment, it is preferable to apply a temperature of 300 ° C to 600 ° C. If the temperature is lower than 300 ° C, the reduction reaction is difficult to be performed, and if the temperature exceeds 600 ° C, the powder is sintered. Further, the component of the fine alloy powder or the mixed powder, which is the base, is preferably Ag-Cu system.
【０００６】[0006]
【作用】上記本発明の酸化物分散電気接点材料の製造方
法によれば、微細なばらつきの少ない安定した酸化物粒
子が均一に分散して、耐摩耗性、耐溶着性に優れて摺動
接点に好適な電気接点材料を容易に製造できる。According to the above-mentioned method for producing an oxide-dispersed electrical contact material of the present invention, stable oxide particles with small fine dispersion are uniformly dispersed, and the sliding contact is excellent in wear resistance and welding resistance. Suitable electrical contact materials can be easily manufactured.
【０００７】[0007]
【実施例】本発明の酸化物分散電気接点材料の製造方法
の一実施例について説明する。ベースとなる粒径 105μ
ｍ以下のＡｇ95.5％−Ｃｕ４％−Ｎｉ 0.5％の合金粉末
に、Ａｌ 500ppm の割り合いで混合するように調整した
Ａｌ（ＮＯ）3 水溶液を含浸させ、次に超音波洗浄して
90℃で乾燥させ、次いで 400℃のＨ2 雰囲気中で還元処
理し、ベースとなる微細なＡｇ95.5％−Ｃｕ４％−Ｎｉ
0.5％の合金粉末の表面に 300Åの膜厚になるようにＡ
ｌを担持させ、次に 300℃の酸素雰囲気中で３時間酸化
処理を行なって前記合金粉末の表面にＡｌ2 Ｏ3 を形成
し、次いでこの微細な合金粉末を焼結した。その後塑性
加工して板材となした。EXAMPLE An example of the method for producing the oxide-dispersed electrical contact material of the present invention will be described. Base particle size 105μ
An alloy powder of Ag 95.5% -Cu 4% -Ni 0.5% of m or less was impregnated with an Al (NO) 3 aqueous solution adjusted to be mixed at a ratio of Al 500 ppm, and then ultrasonically cleaned.
It was dried at 90 ° C and then reduced in a H 2 atmosphere at 400 ° C to form a base of fine Ag 95.5% -Cu 4% -Ni.
A so that the film thickness of 300Å is formed on the surface of 0.5% alloy powder.
1, and then subjected to oxidation treatment in an oxygen atmosphere at 300 ° C. for 3 hours to form Al 2 O 3 on the surface of the alloy powder, and then sintering this fine alloy powder. After that, it was plastically worked into a plate material.
【０００８】このように製造した酸化物分散電気接点材
料の酸化物の分散状態を調べた処、均一であった。また
酸化物粒子の大きさは略 300〜 600Åで、ばらつきが少
なく、安定していた。上記実施例は、酸化したい元素と
してＡｌを用いた場合であるが、Ｓｉ、Ｚｒ、Ｔｉ、Ｍ
ｇでも上記と同様に本発明の製造方法を実施した処、酸
化物の分散状態が均一で、また酸化物粒子の大きさのば
らつきが少なく安定した酸化物分散電気材料が得られ
た。When the oxide dispersion state of the oxide-dispersed electrical contact material thus produced was examined, it was found to be uniform. The size of the oxide particles was about 300 to 600Å, which was stable with little variation. In the above embodiment, Al is used as an element to be oxidized, but Si, Zr, Ti, M
When g was also subjected to the production method of the present invention in the same manner as described above, a stable oxide-dispersed electric material was obtained in which the oxide dispersion state was uniform and the size of the oxide particles was small.
【０００９】また、上記実施例は酸化したい元素を化学
的に含浸させるベースとなる微細な粉末が、合金粉末で
あるが、その合金と同様の成分組成の金属粉末を混合し
た混合粉末に代えても同様の性能を有する酸化物分散電
気接点材料が得られる。Further, in the above embodiment, the fine powder which becomes the base to be chemically impregnated with the element to be oxidized is the alloy powder, but instead of the mixed powder obtained by mixing the metal powder having the same composition as the alloy. Provides an oxide-dispersed electrical contact material with similar performance.
【００１０】[0010]
【発明の効果】以上の説明で判るように本発明の酸化物
分散電気接点材料の製造方法によれば、微細なばらつき
の少ない安定した酸化物粒子が均一に分散して、耐摩耗
性、耐溶着性に優れて摺動接点に好適な電気接点材料を
容易に製造できる。As can be seen from the above description, according to the method for producing an oxide-dispersed electrical contact material of the present invention, stable oxide particles with a small variation are uniformly dispersed, and wear resistance and resistance are improved. It is possible to easily manufacture an electric contact material having excellent weldability and suitable for a sliding contact.
Claims (6)
金と同様の成分組成となる微細な金属粉末を混合した混
合粉末に、酸化したい元素の化合物の水溶液を含浸さ
せ、洗浄乾燥後還元雰囲気中で還元処理してベースとな
る微細な粉末の表面に酸化したい元素を担持させ、次に
大気中又は酸素雰囲気中で酸化処理を行なって微細粉末
の表面に酸化物を形成し、次いでこの微細粉末を焼結す
ることを特徴とする酸化物分散電気接点材料の製造方
法。1. A fine alloy powder as a base or a mixed powder in which a fine metal powder having the same composition as the alloy is mixed is impregnated with an aqueous solution of a compound of an element to be oxidized, washed and dried in a reducing atmosphere. The element to be oxidized is supported on the surface of the fine powder as a base by reducing with, and then an oxidation treatment is performed in the air or in an oxygen atmosphere to form an oxide on the surface of the fine powder. A method for producing an oxide-dispersed electrical contact material, comprising:
ｉ、Ｍｇのいずれかである請求項１記載の酸化物分散電
気接点材料の製造方法。2. The element to be oxidized is Al, Si, Zr, T
The method for producing an oxide-dispersed electrical contact material according to claim 1, which is either i or Mg.
酸塩のいずれかである請求項２記載の酸化物分散電気接
点材料の製造方法。3. The method for producing an oxide-dispersed electrical contact material according to claim 2, wherein the compound of the element to be oxidized is either chloride or nitrate.
末に対する酸化したい元素の割合が10乃至1000ppm とな
るように酸化したい元素を含浸させる請求項１、２又は
３記載の酸化物分散電気接点材の製造方法。4. The oxide-dispersed electrical contact material according to claim 1, wherein the element to be oxidized is impregnated so that the ratio of the element to be oxidized with respect to the fine alloy powder or the mixed powder as the base is 10 to 1000 ppm. Manufacturing method.
末の成分がＡｇ−Ｃｕ系合金である請求項１、２、３又
は４記載の酸化物分散電気接点材の製造方法。5. The method for producing an oxide-dispersed electrical contact material according to claim 1, wherein the component of the fine alloy powder or the mixed powder serving as a base is an Ag—Cu based alloy.
00℃乃至 600℃に加熱することを特徴とする、請求項
１、２、３、４又は５記載の酸化物分散電気接点材料の
製造方法。6. When the reduction treatment is carried out in a reducing atmosphere, 3
The method for producing an oxide-dispersed electrical contact material according to claim 1, 2, 3, 4, or 5, wherein the heating is performed at 00 ° C to 600 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6317534A JPH08153441A (en) | 1994-11-28 | 1994-11-28 | Manufacture of oxide dispersed electric contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6317534A JPH08153441A (en) | 1994-11-28 | 1994-11-28 | Manufacture of oxide dispersed electric contact material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08153441A true JPH08153441A (en) | 1996-06-11 |
Family
ID=18089331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6317534A Pending JPH08153441A (en) | 1994-11-28 | 1994-11-28 | Manufacture of oxide dispersed electric contact material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08153441A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9028586B2 (en) | 2011-12-29 | 2015-05-12 | Umicore | Oxidation method |
-
1994
- 1994-11-28 JP JP6317534A patent/JPH08153441A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9028586B2 (en) | 2011-12-29 | 2015-05-12 | Umicore | Oxidation method |
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