JPH01111787A - Production of low-friction ceramics - Google Patents
Production of low-friction ceramicsInfo
- Publication number
- JPH01111787A JPH01111787A JP26650987A JP26650987A JPH01111787A JP H01111787 A JPH01111787 A JP H01111787A JP 26650987 A JP26650987 A JP 26650987A JP 26650987 A JP26650987 A JP 26650987A JP H01111787 A JPH01111787 A JP H01111787A
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- molding
- friction
- solvent
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000010419 fine particle Substances 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 238000003754 machining Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims description 7
- 238000005245 sintering Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract 5
- 238000004421 molding of ceramic Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 6
- 230000001050 lubricating effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000012700 ceramic precursor Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、軸受など摺動部品に使用できる低摩擦セラミ
ックスの製造方法に係り、特に摺動向に自己潤滑性に優
れた材料を含浸させた低摩擦セラミックスの製造方法に
関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing low-friction ceramics that can be used for sliding parts such as bearings, and in particular, the present invention relates to a method for manufacturing low-friction ceramics that can be used for sliding parts such as bearings, and in particular, the present invention relates to a method for manufacturing low-friction ceramics that can be used for sliding parts such as bearings. The present invention relates to a method for manufacturing low-friction ceramics.
［従来の技術］
従来、炭化ケイ素（Ｓｉｃｋ、窒化ケイ素（３ｉ ｓ
Ｎａ ＞アルミノ （ＡＪ２２０ｘ ）ジルコニア （
Ｚｒ ０２ ）など種々のセラミック材料が耐熱性、耐
摩耗性が要求される個所に使用されている。[Prior Art] Conventionally, silicon carbide (Sick), silicon nitride (3i s
Na > Alumino (AJ220x) Zirconia (
Various ceramic materials such as Zr 02 ) are used where heat resistance and wear resistance are required.
［発明が解決しようとする問題点］
しかしながら、これらセラミックスは、耐摩耗性、耐熱
性は優れているものの摩擦係数が０．３〜゛１と大であ
り軸受や摺動向或いは歯車などに直接使用することはで
きない問題がある。[Problems to be solved by the invention] However, although these ceramics have excellent wear resistance and heat resistance, they have a large coefficient of friction of 0.3 to 1, making it difficult to use them directly for bearings, sliding movements, gears, etc. There are problems that cannot be done.
本発明は上記事情を考慮してなされたもので、摺動部品
の摩擦係数が低くできる低摩擦セラミックスの製造方法
を提供することを目的とする。The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a method for manufacturing low-friction ceramics that can lower the coefficient of friction of sliding parts.
し問題点を解決するための手段及び作用１本発明は、上
記目的を達成するために、ヒラミックスの粉末原料をプ
レスなどにより加圧成形し、その成形体を仮焼結させた
のら、その仮焼結体を機械加工にて所定の寸法に仕上げ
、その加工後の焼結体の摺動部表面に、二硫化モリブデ
ンやカーボンなど自己潤滑性のある微粒子を溶剤と共に
注入或いは浸漬し、これを加熱して溶剤を除去したのら
、ａ温で本焼成するようにしたものである。Means and Effects for Solving the Problems 1 In order to achieve the above-mentioned object, the present invention provides a method in which powder raw material of Hiramix is pressure-molded using a press or the like, and the formed body is pre-sintered. The temporary sintered body is machined to a predetermined size, and self-lubricating fine particles such as molybdenum disulfide and carbon are injected or immersed in a solvent onto the sliding surface of the sintered body after machining. After this was heated to remove the solvent, the main firing was performed at temperature A.
上記構成によれば仮焼結した、仮焼結体を機械加工した
のちの仮焼結体は、未だセラミック粒子同士が緻密化さ
れておらず、多数の気孔を有する。According to the above configuration, the ceramic particles in the pre-sintered body obtained by machining the pre-sintered body are not yet densified and have a large number of pores.
従って摺動部に該当する表面に、その気孔を通し、気孔
内に二硫化モリブデンやカーボンや窒化ボロンなどの微
細粉末を、溶剤を用いて加圧注入したり、浸漬したりす
ることで気孔内に自己潤滑性に優れた材料をその表面か
ら所定深さ充填する。その後溶剤を加熱除去したのち、
高温度で本焼成することでｍ動部表面の摩擦係数０．３
以下の低摩１１１ｔ＝ラミツクスを製造できる。このセ
ラミックスは、例えば３００℃以上の雰囲気で軸受とし
て使用する場合、そのＷＩａ部表面は摩擦係数が低く自
己潤滑性に優れているため、潤滑油などを必要とｔ！ｆ
とも高温雰囲気に耐え、かつ軸（金属性）の摩耗が少な
い良好な軸受とすることができる。Therefore, fine powder such as molybdenum disulfide, carbon, or boron nitride is injected under pressure using a solvent or dipped into the pores of the surface corresponding to the sliding part. A material with excellent self-lubricating properties is filled to a predetermined depth from the surface. Then, after removing the solvent by heating,
The coefficient of friction on the surface of m moving parts is 0.3 by firing at high temperature.
The following low-friction 111t lamics can be manufactured. When this ceramic is used as a bearing in an atmosphere of 300°C or higher, for example, the surface of the WIa portion has a low coefficient of friction and excellent self-lubricating properties, so lubricating oil or the like is not required! f
Both can withstand high-temperature atmospheres and provide good bearings with minimal wear on the shaft (metallic).
［実施例］
以下本発明の好適−実施例を添付図面に基づいて説明す
る。[Embodiments] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図に示すよう軸受の雌形となる型枠１内にセラミッ
クスの原料粉末２を充填し、これを雄型３でプレス加工
する。As shown in FIG. 1, ceramic raw material powder 2 is filled in a mold 1 that is the female shape of the bearing, and then pressed using a male mold 3.
このセラミックス原料粉末は、炭化ケイ素粉、窒化ケイ
素粉、アルミナ粉などで、これをそのまま或いはバイン
ダを加えたり、さらにスラリー状で湿式でプレス加工し
てもよい。The ceramic raw material powder may be silicon carbide powder, silicon nitride powder, alumina powder, etc., and may be used as it is, with a binder added thereto, or may be wet-pressed in the form of a slurry.
セラミックス原料粉末２を加圧成形摂、型枠１から脱型
し、その成形体を電気炉等で１２００℃程度で仮焼結し
、第２図に示した仮焼結体４とする。The ceramic raw material powder 2 is pressure-molded, removed from the mold 1, and the molded body is pre-sintered at about 1200° C. in an electric furnace or the like to form the pre-sintered body 4 shown in FIG.
この仮焼結体４は、ポーラス組織を有し、かつ機械加工
できる程度の硬麿で仮焼結されている。This pre-sintered body 4 has a porous structure and is pre-sintered to a degree of hardness that can be machined.
この仮焼結体４を、図示の二点鎖１”１ｌｆｆｉで示す
よう機械加工により切削し、所定の寸法に加工する。This pre-sintered body 4 is machined to a predetermined size as shown by the double-dot chain 1''1lffi shown in the figure.
次に、この機械加工した仮焼結体４は、その内面４ａが
情などの摺動部となる揚台、二硫化モリブデンやカーボ
ン、グラファイト、窒化ボロンなどの自己潤滑性のある
微粒子を溶剤に混入し、これを仮焼結体４の内面４ａに
加圧注入或いは浸漬する。Next, this machined temporary sintered body 4 is prepared by using a solvent such as self-lubricating fine particles such as molybdenum disulfide, carbon, graphite, and boron nitride. This is injected under pressure or dipped into the inner surface 4a of the temporary sintered body 4.
第３図は、この仮焼結体４の内面４ａを拡大した状態を
示す。FIG. 3 shows an enlarged view of the inner surface 4a of this temporary sintered body 4. As shown in FIG.
まずセラミックス原料粉末２は仮焼結にて、各粒子同志
が結合した状態となるが、粒子間には多数の気孔５がそ
の機械加工された内面４ａに開口している。この気孔５
を通して自己潤滑性のある微粒子６が気孔５内に充填さ
れる。First, the ceramic raw material powder 2 is pre-sintered so that each particle is bonded to each other, and a large number of pores 5 are opened in the machined inner surface 4a between the particles. This pore 5
Through this, self-lubricating fine particles 6 are filled into the pores 5.
その後この仮焼結体４を２００℃程度に加熱して気孔５
内に侵入した溶剤を蒸発或いは熱分解等にて除去する。After that, this temporary sintered body 4 is heated to about 200°C to form pores 5.
The solvent that has entered the tank is removed by evaporation or thermal decomposition.
その後、この仮焼結体４を高温炉内で、例えば１８００
℃に本焼成を行い、第４図に示したように内面４ａに潤
滑層７を有する焼結体８が得られる。Thereafter, this pre-sintered body 4 is heated in a high-temperature furnace, for example, at a temperature of 1800 m
The main firing is carried out at a temperature of 0.degree. C. to obtain a sintered body 8 having a lubricating layer 7 on the inner surface 4a as shown in FIG.
この本焼成により得られた焼結体８は、ダイヤモンド研
磨により最終的寸法精度に仕上げる。The sintered body 8 obtained by this main firing is finished to final dimensional accuracy by diamond polishing.
またこの本焼成により焼結体８は、収縮するため本焼成
前に、その気孔５内にポリカーポジラン、ポリシラン、
コロイダルシリカ、アルミナゾルなどの液状或いはコロ
イド状のセラミック前駆体を含浸等により充填したのち
、本焼成することで収縮を少なくし、かつ緻密なセラミ
ックス焼結体とすることができる。Also, since the sintered body 8 shrinks due to this main firing, polycarposilane, polysilane, etc.
After filling with a liquid or colloidal ceramic precursor such as colloidal silica or alumina sol by impregnation or the like, main firing is performed to reduce shrinkage and to form a dense ceramic sintered body.
このようにして得られた焼結体８は、その内面４ａに二
硫化モリブデンなどからなる潤滑層７が形成され、かつ
その潤滑層７の摩擦係数は０．３以下であり、高温雰囲
気で良好な軸受として使用できる。またこの潤滑層７は
、薄くても全体の機械的強ＩＱは、セラミック原料の焼
結体がもつため支障がない。The sintered body 8 thus obtained has a lubricant layer 7 made of molybdenum disulfide or the like formed on its inner surface 4a, and the coefficient of friction of the lubricant layer 7 is 0.3 or less, making it suitable for use in high-temperature atmospheres. Can be used as a bearing. Further, even if this lubricating layer 7 is thin, there is no problem because the overall mechanical strength IQ is provided by the sintered body of the ceramic raw material.
この焼結体を＾温真空炉内の開閉扉のスライド軸受とし
た場合、このスライド軸受は雰囲気が真空であり、かつ
数１００℃の高温になり苛酷な使用条件となっている。When this sintered body is used as a slide bearing for an opening/closing door in a high-temperature vacuum furnace, the slide bearing has a vacuum atmosphere and a high temperature of several 100 degrees Celsius, resulting in severe operating conditions.
従来このスライド軸受にはステンレス鋼を用いていたが
、本セラミックス焼結体を使用することで摩擦の低減お
よび摩耗寿命の延長ができる。Conventionally, stainless steel was used for this slide bearing, but by using this ceramic sintered body, friction can be reduced and wear life can be extended.
［発明の効果１
以上説明してきたことから明らかなように本発明によれ
ば、次のごとき浸れた効果を発揮する。[Advantageous Effects of the Invention 1] As is clear from the above explanation, the present invention provides the following significant effects.
（１） セラミックの粉末原料を焼結するにおいて、
その仮焼結体に、摺動部に当る表面の気孔に自己、１１
ＷＩ性のある微粒子を充填したのち、本焼成することで
、１ｇ動部表面の摩擦係数を小さくでき、軸受など摺動
部品として使用できる。(1) In sintering ceramic powder raw materials,
In the pre-sintered body, self-containing 11
After being filled with fine particles that have WI properties, the material is fired to reduce the coefficient of friction on the surface of the 1g moving part, allowing it to be used as sliding parts such as bearings.
（２） 潤滑層は摺動部表面のごく一部に形成し、か
つ全体強麿はそのセラミックスの性質そのままの特徴を
残すことができる。(2) The lubricating layer is formed on a small portion of the surface of the sliding part, and the overall strength can retain the characteristics of the ceramic.
第゛１図〜第４図は本発明の低摩擦セラミックスの製造
方法の製造工程を示す図である。
図中、１は型枠、２はセラミック原料、４は仮焼結体、
６は自己ＩｉＩ？ｎ性のある微粒子、７は潤滑層、８は
焼結体である。
特許出願人 石川島播磨重工業株式会社代理人弁理士
絹 谷 信 雄
第３図
第４図FIGS. 1 to 4 are diagrams showing the manufacturing steps of the method for manufacturing low-friction ceramics of the present invention. In the figure, 1 is a formwork, 2 is a ceramic raw material, 4 is a pre-sintered body,
6 is self IiI? 7 is a lubricating layer, and 8 is a sintered body. Patent applicant: Ishikawajima-Harima Heavy Industries Co., Ltd. Representative patent attorney: Nobuo Kinuya Figure 3 Figure 4
Claims (1)
、その成形体を仮焼結させたのち、その仮焼結体を機械
加工にて所定の寸法に仕上げ、その加工後の仮焼結体の
摺動部表面に二硫化モリブデンやカーボンなどの自己潤
滑性のある微粒子を溶剤と共に注入或いは浸漬し、これ
を加熱して溶剤を除去した後高温で本焼成することを特
徴とする低摩擦セラミックスの製造方法。The ceramic powder raw material is pressure-molded using a press, etc., the compact is pre-sintered, the pre-sintered body is machined to the specified dimensions, and the pre-sintered body is rubbed after the machining. Production of low-friction ceramics characterized by injecting or immersing self-lubricating fine particles such as molybdenum disulfide or carbon into the surface of a moving part with a solvent, heating it to remove the solvent, and then firing it at a high temperature. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26650987A JPH01111787A (en) | 1987-10-23 | 1987-10-23 | Production of low-friction ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26650987A JPH01111787A (en) | 1987-10-23 | 1987-10-23 | Production of low-friction ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01111787A true JPH01111787A (en) | 1989-04-28 |
Family
ID=17431896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26650987A Pending JPH01111787A (en) | 1987-10-23 | 1987-10-23 | Production of low-friction ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01111787A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035501C (en) * | 1993-12-04 | 1997-07-30 | 江西省萍乡市化工填料公司 | Active porcelain ball filler |
| CN115594525A (en) * | 2022-10-25 | 2023-01-13 | 崇义恒毅陶瓷复合材料有限公司（Cn） | Wear-resistant sheet of centrifugal machine and preparation process thereof |
-
1987
- 1987-10-23 JP JP26650987A patent/JPH01111787A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035501C (en) * | 1993-12-04 | 1997-07-30 | 江西省萍乡市化工填料公司 | Active porcelain ball filler |
| CN115594525A (en) * | 2022-10-25 | 2023-01-13 | 崇义恒毅陶瓷复合材料有限公司（Cn） | Wear-resistant sheet of centrifugal machine and preparation process thereof |
| CN115594525B (en) * | 2022-10-25 | 2023-08-18 | 崇义恒毅陶瓷复合材料有限公司 | Wear-resistant plate of centrifugal machine and preparation process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3925575A (en) | Ceramic treating process and product produced thereby | |
| US3789096A (en) | Method of impregnating porous refractory bodies with inorganic chromium compound | |
| US3222438A (en) | Heat resisting material and method for producing it | |
| JP2722182B2 (en) | Porous SiC bearing material having three types of pore structure and method of manufacturing the same | |
| Jr Cichocki et al. | Tailored Porosity Gradients via Colloidal Infiltration of Compression‐Molded Sponges | |
| JPH02243572A (en) | Ceramic composite | |
| JPH08501500A (en) | Method for manufacturing ceramic-metal composite material | |
| JPH01111787A (en) | Production of low-friction ceramics | |
| US5612265A (en) | Composites for wear | |
| Semen et al. | A preceramic polymer route to molded SiC ceramic parts | |
| US3394026A (en) | Method of glazing silicon nitride shaped body and article | |
| JPS5919717A (en) | Heat resistant non-oil feeding structure | |
| CN109234559B (en) | Porous self-lubricating Fe2B-Fe metal ceramic composite material and preparation method thereof | |
| JPS62148384A (en) | Silicon carbide base composite material | |
| JPH04293998A (en) | Sliding member | |
| JPS6237517A (en) | Sliding member | |
| EP0753101B1 (en) | Engine components including ceramic-metal composites | |
| JPH0781645B2 (en) | Valve body for valve | |
| JPS6353316A (en) | Slide member and its manufacture | |
| JP3082314B2 (en) | Ceramics with good lubricity, ceramic mechanism members, and method of manufacturing the same | |
| US4689189A (en) | Composite of Si3 N4 by infiltration | |
| JPH01300079A (en) | Compressor vane | |
| Chen et al. | Novel Al/Al2O3 composite foams by direct oxidation conversion | |
| JPH04342471A (en) | Reacted sintered composite ceramic, its production and sliding member using the same | |
| JPS61281086A (en) | Sliding material |