JP2836866B2 - Ceramic-SiC-molybdenum disulfide-based composite material and its sliding parts - Google Patents
Ceramic-SiC-molybdenum disulfide-based composite material and its sliding partsInfo
- Publication number
- JP2836866B2 JP2836866B2 JP1277563A JP27756389A JP2836866B2 JP 2836866 B2 JP2836866 B2 JP 2836866B2 JP 1277563 A JP1277563 A JP 1277563A JP 27756389 A JP27756389 A JP 27756389A JP 2836866 B2 JP2836866 B2 JP 2836866B2
- Authority
- JP
- Japan
- Prior art keywords
- sic
- molybdenum disulfide
- composite material
- ceramic
- ceramics
- 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 - Fee Related
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、強度、硬度、破壊靭性、摺動特性及び耐摩
耗性に優れるセラミックス−SiC−二硫化モリブデン（M
oS2）系複合材料に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to ceramics-SiC-molybdenum disulfide (M) having excellent strength, hardness, fracture toughness, sliding characteristics and wear resistance.
oS 2) based on the composite material.
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、摩耗しやすい等、その摺動特性が低いため広く実用
化には至っていない。Ceramics have excellent heat resistance and corrosion resistance, and have high hardness and high strength. Therefore, they are widely used as wear-resistant materials such as slurry transport pipe linings, casting sand stirring blades, and the like. However, when used as precision sliding materials such as balls for mechanical seals, rolling bearings, retainers, magnetic heads, sliders, etc. Not reached.
これを解決する手段として、特昭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, Japanese Patent Publication No. 61-281086 discloses "Method of impregnating porous ceramics with fluorine oil" and Japanese Patent Application Laid-Open No. 61-251586 discloses "Method of impregnating resin into porous ceramics". However, all of them are ceramic-organic compound 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、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 use environment conditions such as high temperature and under vacuum are restricted.
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シブルディスクやハードデスク
または磁気テープを用いて記録再生を行なうため、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。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
スに替わる材料が強く要望されている。On the other hand, at present, various magnetic media devices are commercially available for recording / 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, and further increasing the density. Development is under way. 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. In particular, due to the trend toward high speed and high density, stricter restrictions are imposed on sliding parts with a medium, and there is a strong demand for a material replacing conventional ceramics.
上記事情に鑑み、本発明の目的は強度、硬度、破壊靭
性、摺動特性及び耐摩耗性に優れるセラミックス複合材
料を提供することにある。In view of the above circumstances, an object of the present invention is to provide a ceramic composite material having excellent strength, hardness, fracture toughness, sliding characteristics, and wear resistance.
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、セラミックス−SiC−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至っ
た。In order to achieve the above object, the present inventors have conducted intensive studies and as a result, have found that a ceramic-SiC-molybdenum disulfide-based composite material has an excellent effect, and have accomplished the present invention.
即ち本発明は、金属酸化物及び／または複酸化物で構
成されるセラミックス45.0〜94.5wt％、SiCウイスカー
及びSiC粒の含量5.0〜50wt％、及び二硫化モリブデン0.
5〜25.0wt％からなることを特徴とするセラミックス−S
iC−二硫化モリブデン系複合材料を提供する。更に本発
明は、上記複合材料を用いた摺動部品を提供する。That is, the present invention provides 45.0 to 94.5 wt% of ceramics composed of metal oxides and / or double oxides, 5.0 to 50 wt% of SiC whiskers and SiC particles, and 0.1 to 0.1 wt% of molybdenum disulfide.
Ceramics-S characterized by comprising 5 to 25.0 wt%
Provided is an iC-molybdenum disulfide-based composite material. Further, the present invention provides a sliding component using the above composite material.
本発明で使用するセラミックスの金属種としては特に
制限されないが、II、III、IV、Ｖ、VI、VIIおよびVIII
属金属、または希土類金属が好ましく、例えばAl、Mg、
Ca、Ba、Ti、Zr、Cr、Mo、Mn、Fe、Co、Ni、Ｙが挙げら
れる。これらの金属の１種以上の金属酸化物および／ま
たは複酸化物がセラミックスに用いられる。これらの具
体例としては、Al2O3、MgO、ZyO2、TiO2、Fe2O、FeO3、
CoC、Co2C3、NiO、MnO、CaO、Cr2O3、MoO3、BaO、Y
2O3、BaTiO3、CaZrO3、CaTiO3、MgAl2O4、MgFeO4等が挙
げられる。これら金属酸化物セラミックス原料粉末はい
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90％以上、粒径５μ以下のものが好まし
い。Although the metal species of the ceramic used in the present invention is not particularly limited, II, III, IV, V, VI, VII and VIII
Group metals, or rare earth metals are preferred, such as Al, Mg,
Examples include Ca, Ba, Ti, Zr, Cr, Mo, Mn, Fe, Co, Ni, and Y. One or more metal oxides and / or double oxides of these metals are used in ceramics. Specific examples of these include Al 2 O 3 , MgO, ZyO 2 , TiO 2 , Fe 2 O, FeO 3 ,
CoC, Co 2 C 3 , NiO, MnO, CaO, Cr 2 O 3 , MoO 3 , BaO, Y
2 O 3 , BaTiO 3 , CaZrO 3 , CaTiO 3 , MgAl 2 O 4 , MgFeO 4 and the like. These metal oxide ceramic raw material powders may be of any production method, but preferably have a purity of 90% or more and a particle size of 5 μm or less in order not to impair the effects of the present invention.
本発明で使用するSiCウイスカー及び又はSiC粒は本発
明の効果を損なわないため純度90％以上が望ましい。又
複合による破壊靭性向上効果のため、ウイスカーの場合
は直径５μｍ以下でアスペクト比３以上、粒の場合は平
均粒径１μｍ以下のものが望ましい。The purity of the SiC whiskers and / or SiC particles used in the present invention is preferably 90% or more so as not to impair the effects of the present invention. In addition, because of the effect of improving the fracture toughness due to the composite, it is desirable that the whisker has a diameter of 5 μm or less and the aspect ratio of 3 or more, and the grains have an average particle diameter of 1 μm or less.
又本発明で使用する二硫化モリブデンは天然品若しく
は合成品の何れのものでもよく、通常粉体で用いる。
尚、本発明の効果を損なわせないため純度は90％以上、
粒径は金属酸化物セラミックス粉末との分散性から５μ
以下のものが好ましい。The molybdenum disulfide used in the present invention may be either a natural product or a synthetic product, and is usually used as a powder.
In addition, the purity is 90% or more so as not to impair the effects of the present invention.
Particle size is 5μ due to dispersibility with metal oxide ceramic powder.
The following are preferred.
本発明の複合材料の組成に於いて、上記セラミックス
の使用量は45.0〜94.5wt％、好ましくは50〜86.5wt％で
ある。上記SiCウイスカー及び／又はSiC粒の使用量は、
含量で5.0〜50.0wt％、好ましくは7.5〜47.5wt％であ
る。また上記二硫化モリブデンの使用量は0.5〜25.0wt
％、好ましくは１〜20wt％である。上記セラミックスが
45.0wt％未満で且つ上記二硫化モリブデンが25.0wt％よ
り多いと、セラミックス本来の強度及び硬度特性を維持
することは困難である。また上記セラミックスが94.5wt
％より多く且つ上記モリブデンが0.5wt％未満だと、摺
動性に改善が見られず好ましくない。又、SiCウイスカ
ー及びSiC粒の含量が5.0wt％より少ないと破壊靭性の向
上が認められなく、50wt％より多いと、焼成後の低密
度、低強度となり本発明の特徴をそこなう。In the composition of the composite material of the present invention, the amount of the ceramic used is 45.0 to 94.5 wt%, preferably 50 to 86.5 wt%. The amount of the SiC whiskers and / or SiC particles used is
The content is 5.0 to 50.0 wt%, preferably 7.5 to 47.5 wt%. The amount of molybdenum disulfide used is 0.5 to 25.0 wt.
%, Preferably 1 to 20% by weight. The above ceramics
If the content is less than 45.0 wt% and the content of molybdenum disulfide is more than 25.0 wt%, it is difficult to maintain the strength and hardness characteristics inherent in ceramics. 94.5wt of the above ceramics
% And the molybdenum content is less than 0.5% by weight, the slidability is not improved, which is not preferable. If the content of SiC whiskers and SiC grains is less than 5.0% by weight, no improvement in fracture toughness is observed. If the content is more than 50% by weight, the density and strength after firing become low, defeating the features of the present invention.
本発明の複合材料の調製に於いて、上記セラミック
ス、SiCウイスカー及び／又はSiC粒、及び二硫化モリブ
デンは乾式及び／または湿式で混合された後、場合に依
っては、噴霧乾燥後で造粒し、金形プレス、鋳込み成
形、射出成形等で成形する。焼成は、真空下、若しくは
Ar等の不活性雰囲気下、1300〜1600℃の範囲で焼結する
のが好ましい。焼結温度が1300℃未満だと焼結が進行せ
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。また、更に高密度化させるために、ホット
プレス、HIP等の加圧焼成法を適用してもよい。また、
添加剤としてSiC以外の非酸化物セラミックス等を10wt
％以下で加えても良い。In the preparation of the composite material of the present invention, the above ceramics, SiC whiskers and / or SiC particles, and molybdenum disulfide are mixed in a dry and / or wet manner, and optionally, granulated after spray drying. Then, it is molded by a die press, a casting molding, an injection molding or the like. Firing is under vacuum or
It is preferable to perform sintering in the range of 1300 to 1600 ° C. in an inert atmosphere such as Ar. If the sintering temperature is lower than 1300 ° C., sintering does not proceed 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. Further, in order to further increase the density, a pressure firing method such as hot pressing or HIP may be applied. Also,
10 wt% of non-oxide ceramics other than SiC as additives
% May be added.
本発明により得られる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セラミックス−
SiC−MoS2系複合材料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は軸受けリテーナー、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 properties 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 the part that is in temporary or constant contact and relatively slides, at least the sliding surface of the ceramic element of the present invention is used.
It must be composed of a SiC-MoS 2 composite material. Specific examples of the sliding component include a bearing retainer, a mechanical seal, a flow valve for coal slurry, and a drawing die.
このような本発明の方法により得られるセラミックス
−SiC−二硫化モリブデン系複合材料は二硫化モリブデ
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、強度、硬度、耐熱性、破壊
靭性、耐摩耗性、摺動特性等に格段に優れる。In the ceramic-SiC-molybdenum disulfide-based composite material obtained by such a method of the present invention, molybdenum disulfide is uniformly dispersed, the denseness is sufficient, and the strength, hardness, Excellent heat resistance, fracture toughness, wear resistance, sliding characteristics, etc.
〔実施例〕 以下、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より限定されるものではな
い。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
実施例１〜16及び比較例１〜５ 第１表に示すセラミックス粉末、SiCウイスカー及び
又はSiC粒、及び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て、各複合材料を
得た。得られた各複合材料の曲げ強度、硬度、破壊靭性
値、摩耗係数、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 R1601、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、破
壊靭性値はIF法により求めた。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 16 and Comparative Examples 1 to 5 Wet-mixed ceramic powder, SiC whiskers and / or SiC particles, and molybdenum disulfide powder shown in Table 1 at a predetermined ratio, spray-dried, and then 1000 kgf / cm 2 Under each of the conditions described above, and fired under the conditions shown in the table to obtain each composite material. The bending strength, hardness, fracture toughness value, wear coefficient, and wear amount of each obtained composite material were measured. These results are
Also shown in the table. The strength was determined by a JIS R1601, three-point bending test, the hardness was determined by a Vickers hardness tester under a load of 10 kg, and the fracture toughness was determined by the IF method. The friction coefficient and the wear amount were measured by selecting a mating material, SUJ-2, and applying a 1 kg load at a rotation speed of 300 rpm by a pin-on-disk method.
１）： 平均直径0.5μｍ、アスペクト比10、純度98以
上。 1): Average diameter 0.5 μm, aspect ratio 10, purity 98 or more.
２）： α型、平均粒径0.1μｍ、純度98以上。2): α-type, average particle size 0.1 μm, purity 98 or more.
３）： 平均粒径１μｍ、純度98以上。3): Average particle size 1 μm, purity 98 or more.
実施例１を転がり軸受けリテーナーに精密加工し、使
用したところ、無潤滑で長時間の耐久性を示した。When Example 1 was precision machined into a rolling bearing retainer and used, it showed no lubrication and long-term durability.
実施例２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 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.
実施例７を石炭スラリーの流量バルブとして使用した
ところ、スラリーのカットオフがスムーズに行え、摺動
特性が良好で、耐摩耗性も良好であった。When Example 7 was used as a flow valve for coal slurry, the cutoff of the slurry was performed smoothly, the sliding characteristics were good, and the wear resistance was good.
実施例８を鋼線の線引きダイスに適用したところ、鋼
線の焼き付きもなく、長時間の耐久性を示した。When Example 8 was applied to a steel wire drawing die, there was no seizure of the steel wire and a long-term durability was exhibited.
実施例11を精密加工し、磁気ヘッド基材として使用し
たところ、相手メディアを傷つけることなく、耐久性も
良好であった。When Example 11 was precision-processed and used as a magnetic head base material, the durability was good without damaging the partner medium.
実施例16を撚糸リングとして使用したところ、従来セ
ラミックスに較べ、低摩耗性、高耐久性を示した。When Example 16 was used as a twist ring, it showed lower wear and higher durability than conventional ceramics.
Claims (2)
れるセラミックス45.0〜94.5wt％、SiCウイスカー及びS
iC粒の合量5.0〜50wt％、及び二硫化モリブデン0.5〜2
5.0wt％からなることを特徴とするセラミックス−SiC−
二硫化モリブデン系複合材料。1. Ceramics composed of metal oxide and / or double oxide: 45.0 to 94.5 wt%, SiC whiskers and S
5.0 to 50% by weight of iC particles and 0.5 to 2 molybdenum disulfide
Ceramics characterized by consisting of 5.0wt% -SiC-
Molybdenum disulfide composite material.
と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請求項１記載のセラミ
ックス−SiC−二硫化モリブデン系複合材料より構成さ
れていることを特徴とする摺動部品。2. The ceramic element according to claim 1, wherein the mechanical element has a movable portion, and at least a sliding surface of the portion that is in temporary or constant contact with the movable portion and relatively slides. A sliding component comprising a SiC-molybdenum disulfide-based composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1277563A JP2836866B2 (en) | 1989-10-25 | 1989-10-25 | Ceramic-SiC-molybdenum disulfide-based composite material and its sliding parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1277563A JP2836866B2 (en) | 1989-10-25 | 1989-10-25 | Ceramic-SiC-molybdenum disulfide-based composite material and its sliding parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03141167A JPH03141167A (en) | 1991-06-17 |
| JP2836866B2 true JP2836866B2 (en) | 1998-12-14 |
Family
ID=17585255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1277563A Expired - Fee Related JP2836866B2 (en) | 1989-10-25 | 1989-10-25 | Ceramic-SiC-molybdenum disulfide-based composite material and its sliding parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2836866B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307611A (en) * | 2021-06-30 | 2021-08-27 | 中国建筑材料工业地质勘查中心宁夏总队 | Method for preparing SiC whiskers by adopting coal slime |
-
1989
- 1989-10-25 JP JP1277563A patent/JP2836866B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03141167A (en) | 1991-06-17 |
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