JP2752417B2 - Preparation of Alumina-Molybdenum Disulfide Composite - Google Patents
Preparation of Alumina-Molybdenum Disulfide CompositeInfo
- Publication number
- JP2752417B2 JP2752417B2 JP1066856A JP6685689A JP2752417B2 JP 2752417 B2 JP2752417 B2 JP 2752417B2 JP 1066856 A JP1066856 A JP 1066856A JP 6685689 A JP6685689 A JP 6685689A JP 2752417 B2 JP2752417 B2 JP 2752417B2
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- molybdenum disulfide
- present
- preparation
- sliding
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、摺動特性および耐摩耗性に優れるアルミナ
（Al2O3）−二硫化モリブデン（MoS2）系複合材料に関
する。Description: TECHNICAL FIELD The present invention relates to an alumina (Al 2 O 3 ) -molybdenum disulfide (MoS 2 ) composite material having excellent sliding characteristics and abrasion resistance.
［従来の技術］ セラミックスは、優れた耐熱性、耐食性をもち、高硬
度、高強度であるため、スラリー輸送パイプ内張り、鋳
物砂撹拌羽根等、耐摩耗材料として広く利用されてい
る。しかしながら、メカニカルシール、ころがり軸受の
ボール、リテーナー、磁気ヘッドスライダー等の精密摺
動材料として利用する場合、例えば摩擦係数が大きい、
摩擦しやすい等、その摺動特性が低いため広く実用化に
は至っていない。[Prior Art] Ceramics are widely used as wear-resistant materials such as linings for slurry transport pipes and agitating blades for foundry sand because of their excellent heat resistance and corrosion resistance, high hardness and high strength. However, when used as precision sliding materials such as mechanical seals, balls for rolling bearings, retainers, and magnetic head sliders, for example, the friction coefficient is large.
Due to its low sliding characteristics such as easy friction, it has not been widely used.
これを解決する手段として、特開昭61−281086号公報
に「セラミックス多孔体にフッ素オイルを含浸する方
法」、特開昭61−251586号公報に「セラミックス多孔体
に樹脂を含浸する方法」が開示されているが、いずれも
セラミックス−有機物複合系で、セラミックスの優れた
耐熱性を発現できない。また、セラミックス多孔体に有
機物を含浸しただけなので、強度、硬度、破壊靭性が不
十分である。As means for solving this, JP-A-61-281086 discloses a method of impregnating a porous ceramic body with fluorine oil, and JP-A-61-251586 discloses a method of impregnating a porous ceramic body with a resin. Although all are disclosed, they are ceramic-organic composite systems and cannot exhibit excellent heat resistance of ceramics. In addition, the strength, hardness, and fracture toughness are insufficient because the ceramic porous body is simply impregnated with an organic substance.
また、特開昭61−51614号公報に「ZrO2とカーボンと
の混合物を焼結する方法」が開示されているが、フェノ
ールレジンを炭素源としているため、摺動特性改善効果
は低く、また高温、真空下等に使用環境条件が制限され
るという問題点を有する。Japanese Patent Application Laid-Open No. 61-51614 discloses a method of sintering a mixture of ZrO 2 and carbon.However, since phenol resin is used as a carbon source, the effect of improving sliding characteristics is low, and There is a problem that operating environment conditions are limited to high temperature, under vacuum and the like.
一方、現在、表面に磁性層を塗布したり、薄膜形成し
た磁性層を有するフレキブルディスクやハードディスク
または磁気テープを用いて記録再生を行うため、種々の
磁気媒体装置が市販され、さらに高密度化に向けて開発
が進められている。On the other hand, at present, various magnetic media devices are commercially available for recording and reproducing using a flexible disk, a hard disk or a magnetic tape having a magnetic layer coated on the surface or a magnetic layer formed as a thin film. Development is under way.
これら記録再生装置は、磁気媒体と常時または一時的
に相対に接触する摺動部品が数多く使用されている。こ
の種の摺動部品は耐久性に優れ、かつ相対的に接触する
記録媒体を損傷させないことが必要である。特に高速、
高密度化の傾向のため、媒体との摺動部品にはより厳し
い制約が課せられ従来のセラミックスに替わる材料が要
望されている。Many of these recording / reproducing devices use sliding components that are constantly or temporarily in relative contact with a magnetic medium. This kind of sliding component is required to be excellent in durability and not to damage a recording medium which is in relative contact. Especially fast,
Due to the trend toward higher densities, stricter restrictions are imposed on sliding parts with media, and there is a demand for a material that can replace conventional ceramics.
［発明が解決しようとする課題］ 上記事情に鑑み、本発明の目的は強度、硬度、破壊靭
性、摺動特性に優れるセラミックス材料を提供すること
にある。[Problems to be Solved by the Invention] In view of the above circumstances, an object of the present invention is to provide a ceramic material having excellent strength, hardness, fracture toughness, and sliding characteristics.
［課題を解決するための手段］ 上記目的を達成するために本研究者等は鋭意研究の結
果、特定製法のアルミナ−二硫化モリブデン系複合材料
が優れた効果を奏することを見出し本発明を成すに到っ
た。[Means for Solving the Problems] In order to achieve the above object, the present inventors have conducted intensive studies and as a result, have found that an alumina-molybdenum disulfide-based composite material of a specific production method has an excellent effect, and constitute the present invention. Reached.
即ち、本発明は、アルミナ（Al2O3）75.0〜99.5wt％
と二硫化モリブデン（MoS2）0.5〜25.0wt％とを混合し
造粒し成形した後、不活性雰囲気下で1300〜1600℃で焼
成することを特徴とするアルミナ−二硫化モリブデン系
複合材料の製法を提供する。That is, the present invention relates to an alumina (Al 2 O 3 ) 75.0 to 99.5 wt%
And molybdenum disulfide (MoS 2 ) 0.5 to 25.0 wt% are mixed, granulated and molded, and then fired at 1300 to 1600 ° C. in an inert atmosphere. Provide a recipe.
本発明で使用されるアルミナ（Al2O3）は、いかなる
製法のものでも良いが、本発明の効果を損なわない為
に、純度90wt％以上、粒径５μ以下のものが好ましい。The alumina (Al 2 O 3 ) used in the present invention may be of any production method, but preferably has a purity of 90 wt% or more and a particle size of 5 μ or less in order not to impair the effects of the present invention.
また本発明で使用する二硫化モリブデンは天然のもの
若しくは合成のものでもよく、通常粉体で用いるが、本
発明の効果を損なわせないため純度90重量％以上で、ま
たアルミナ粉体との分散性から粒径５μ以下のものが好
ましい。The molybdenum disulfide used in the present invention may be natural or synthetic, and is usually used in the form of powder. However, the purity of the powder is not less than 90% by weight so as not to impair the effects of the present invention. Those having a particle size of 5 μm or less are preferred from the viewpoint of properties.
本発明の複合材料の組成において、上記アルミナの使
用量は75.0〜99.5重量％、好ましくは80〜99重量％であ
る。また上記二硫化モリブデンの使用量は0.5〜35.0重
量％、好ましくは１〜20重量％である。In the composition of the composite material of the present invention, the used amount of the alumina is 75.0 to 99.5% by weight, preferably 80 to 99% by weight. The amount of molybdenum disulfide used is 0.5 to 35.0% by weight, preferably 1 to 20% by weight.
アルミナが75.0重量％未満で且つ上記二硫化モリブデ
ンが25.0重量％より多いと、アルミナ本来の強度及び硬
度特性を維持することは困難である。またアルミナが9
9.5重量％より多く且つ上記モリブデンが0.5重量％未満
だと、摺動性に改善が見られず好ましくない。If the alumina is less than 75.0% by weight and the molybdenum disulfide is more than 25.0% by weight, it is difficult to maintain the original strength and hardness characteristics of alumina. Alumina is 9
If the content is more than 9.5% by weight and the content of molybdenum is less than 0.5% by weight, no improvement in slidability is observed, which is not preferable.
本発明のアルミナと二硫化モリブデンは両者の粉末を
乾式及び／または湿式で混合された後、場合に依って
は、噴霧乾燥等で造粒し、金形プレス、鋳込み成形、噴
出成形等で成形する。焼成は、真空下、若しくはAr等の
不活性雰囲気で1300〜1600℃の範囲で焼成する。焼結温
度が1300℃未満だと二硫化モリブデンが溶融状態となら
ず緻密な焼結体が得られない。また1600℃を超えると二
硫化モリブデンの分解が起こり、組織が多孔質となり好
ましくない。高密度化させるために、ホットプレス、HI
P等の加圧焼成法が適用してもよい。また、添加剤とし
て炭素セラミックス、非酸化物得を10重量％以下で加え
ても良い。The alumina and molybdenum disulfide of the present invention are obtained by mixing both powders in a dry and / or wet manner, and then, depending on the case, granulating them by spray drying or the like, and forming them by die pressing, casting, injection molding, or the like. I do. The firing is performed in a vacuum or in an inert atmosphere such as Ar at a temperature of 1300 to 1600 ° C. If the sintering temperature is lower than 1300 ° C., molybdenum disulfide will not be in a molten state and a dense sintered body cannot be obtained. On the other hand, when the temperature exceeds 1600 ° C., decomposition of molybdenum disulfide occurs and the structure becomes porous, which is not preferable. Hot press, HI to increase density
A pressure firing method such as P may be applied. In addition, carbon ceramics and non-oxide may be added as additives at 10% by weight or less.
本発明により得られた複合材料は摺動特性が優れ、か
つ耐摩耗性にも優れ、摺動部品として極めて好適であ
る。摺動部品は機械要素がその可動する部分を有し、一
時的または常時接触し、かつ相対的に摺動する部分に於
いて少なくとも、その摺動面が本発明のアルミナ−MoS2
系複合材料により構成されていることを要する。摺動部
品の具体例として軸受けリテーナ、メカニカルシール、
石炭スラリーの流量バルブ、線引きダイス等が挙げられ
る。The composite material obtained by the present invention has excellent sliding characteristics and excellent wear resistance, and is extremely suitable as a sliding part. The sliding component has a movable part where the mechanical element is movable, and at least in a part that is in temporary or constant contact and relatively slides, at least its sliding surface is the alumina-MoS 2 of the present invention.
It must be made of a composite material. Bearing retainers, mechanical seals, as specific examples of sliding parts,
A flow valve of coal slurry, a drawing die, and the like are included.
［発明の効果］ このような本発明の方法により得られるアルミナ−二
硫化モリブデン系複合材料セラミックスは二硫化モリブ
デンが均一に分散しており、緻密さも充分で、従来のセ
ラミックス系複合材料に較べ、耐熱性、機械的特性、摺
動特性に格段に優れる。[Effects of the Invention] The alumina-molybdenum disulfide-based composite ceramics obtained by the method of the present invention has molybdenum disulfide uniformly dispersed therein and has a sufficient density. Excellent heat resistance, mechanical properties and sliding properties.
［実施例］ 以下の本発明を実施例によって更に詳しく説明する
が、本発明はこれら実施例に限定されるものではない。[Examples] The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
実施例１〜４及び比較例１〜４ 実施例１〜４、および比較例１〜４は、第１表に示すよ
うにアルミナ粉体と二硫化モリブデン粉末を所定の量比
で湿式混合し、噴霧乾燥した後、1000kgf/cm2の条件下
で一軸成形し、表に示す条件下で焼成しで、各複合材料
を得た。更に得られた複合材料の強度、硬度、摩擦係
数、摩耗量を測定した。これらの結果を第１表に併記す
る。強度はJIS 1604K、３点曲げ試験により、硬度はビ
ッカース硬度計により10kgの荷重下で、摩擦係数、摩耗
量は相手材に、SUJ−２を選び、1kgの荷重下、ピンオン
ディスク法により300rpmの回転数で測定したものであ
る。Examples 1 to 4 and Comparative Examples 1 to 4 Examples 1 to 4 and Comparative Examples 1 to 4 were obtained by wet mixing alumina powder and molybdenum disulfide powder at a predetermined ratio as shown in Table 1, After spray drying, the mixture was uniaxially formed under the conditions of 1000 kgf / cm 2 and fired under the conditions shown in the table to obtain each composite material. Further, the strength, hardness, friction coefficient, and abrasion amount of the obtained composite material were measured. The results are shown in Table 1. The strength was determined by JIS 1604K, by a three-point bending test, and the hardness was measured under a load of 10 kg by a Vickers hardness tester. It was measured at the number of rotations.
実施例１で得た材料を転がり軸受けリテーナに精密加
工し、使用したところ、無潤滑で長時間の耐久性を示し
た。 When the material obtained in Example 1 was precision machined into a rolling bearing retainer and used, it exhibited no lubrication and long-term durability.
実施例２で得た材料をメカニカルシールに適用したと
ころ、従来材料に較べ、シール性も良好で長時間の耐久
性を示した。When the material obtained in Example 2 was applied to a mechanical seal, the sealability was better and the durability for a long time was shown as compared with the conventional material.
Claims (1)
化モリブデン（MoS2）0.5〜25.0wt％とを混合し造粒し
成形した後、不活性雰囲気下で1300〜1600℃で焼結する
ことを特徴とするアルミナ−二硫化モリブデン系複合材
料の製法。1. A mixture of alumina (Al 2 O 3 ) 75.0-99.5 wt% and molybdenum disulfide (MoS 2 ) 0.5-25.0 wt%, granulation and molding, and then at 1300-1600 ° C. under an inert atmosphere. A method for producing an alumina-molybdenum disulfide-based composite material, characterized by sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1066856A JP2752417B2 (en) | 1989-03-17 | 1989-03-17 | Preparation of Alumina-Molybdenum Disulfide Composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1066856A JP2752417B2 (en) | 1989-03-17 | 1989-03-17 | Preparation of Alumina-Molybdenum Disulfide Composite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02248360A JPH02248360A (en) | 1990-10-04 |
| JP2752417B2 true JP2752417B2 (en) | 1998-05-18 |
Family
ID=13327912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1066856A Expired - Lifetime JP2752417B2 (en) | 1989-03-17 | 1989-03-17 | Preparation of Alumina-Molybdenum Disulfide Composite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2752417B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10113918C2 (en) * | 2001-03-07 | 2003-04-24 | Becorit Gmbh | Sintered inorganic granules and moldings based on carbon and / or molybdenum compounds in a ceramic matrix, their production and their use |
| CN110317047A (en) * | 2019-07-10 | 2019-10-11 | 鲁东大学 | A kind of temperature gradient selfreparing multi-layered ceramic cutter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6311559A (en) * | 1986-06-30 | 1988-01-19 | ブラザー工業株式会社 | Manufacture of self-lubricating composite material |
| JPS63112455A (en) * | 1986-10-30 | 1988-05-17 | 株式会社東芝 | Ceramic powder and forming process |
| JPS63176350A (en) * | 1987-01-14 | 1988-07-20 | 株式会社日立製作所 | Slider for thin film magnetic head |
-
1989
- 1989-03-17 JP JP1066856A patent/JP2752417B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02248360A (en) | 1990-10-04 |
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