JPH04224881A - Rotor disc made of ceramic - Google Patents
Rotor disc made of ceramicInfo
- Publication number
- JPH04224881A JPH04224881A JP2406722A JP40672290A JPH04224881A JP H04224881 A JPH04224881 A JP H04224881A JP 2406722 A JP2406722 A JP 2406722A JP 40672290 A JP40672290 A JP 40672290A JP H04224881 A JPH04224881 A JP H04224881A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- silicon nitride
- whiskers
- rotor
- rotor disk
- 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.)
- Withdrawn
Links
- 239000000919 ceramic Substances 0.000 title claims description 17
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 10
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 13
- 229910010293 ceramic material Inorganic materials 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052742 iron Inorganic materials 0.000 abstract description 8
- 238000005245 sintering Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007246 mechanism Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 229910007277 Si3 N4 Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001513 hot isostatic pressing Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Braking Arrangements (AREA)
- Ceramic Products (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はセラミックス製ローター
ディスクに係り、特に軽量かつ高強度で、耐久性に優れ
、自動車用ディスクブレーキ機構等のローターディスク
の軽量化に有効なセラミックス製ローターディスクに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic rotor disk, and more particularly to a ceramic rotor disk that is lightweight, has high strength, has excellent durability, and is effective in reducing the weight of rotor disks in automobile disc brake mechanisms and the like.
【０００２】0002
【従来の技術】従来、自動車用ローターディスクは、安
価であること、材料の信頼性が高いこと、製造が容易で
あることなどの点から、鉄製のものが主流である。とこ
ろで、昨今、地球環境保全の面から、自動車関連分野に
おいても、省エネルギー化を図る動きがあり、この対応
策として、自動車重量の軽量化が大きな課題となってい
る。このため、ローターディスクについても、その軽量
化が望まれている。2. Description of the Related Art Conventionally, rotor disks for automobiles have been mainly made of iron because of their low cost, high reliability of materials, and ease of manufacture. Incidentally, in recent years, there has been a movement to save energy in the automobile-related field in order to preserve the global environment, and as a countermeasure to this, reducing the weight of automobiles has become a major issue. Therefore, it is desired that the weight of the rotor disk be reduced as well.
【０００３】0003
【発明が解決しようとする課題】従来の鉄製自動車用ロ
ーターディスクは、■重量が重い。■錆易い。といった
欠点があり、■は自動車の燃費、加速性、慣性力に大き
な影響を与え、また、■は錆のため制動力、制動メカニ
ズムにとって欠点となり、省エネルギー化に逆行するも
のである。[Problems to be Solved by the Invention] Conventional steel rotor disks for automobiles are heavy. ■Easy to rust. There are drawbacks such as (2), which has a large effect on the fuel efficiency, acceleration, and inertia of the automobile, and (2), which causes rust, which is a drawback to the braking force and braking mechanism, and goes against energy conservation.
【０００４】本発明は上記従来の問題点を解決し、軽量
かつ高強度で耐久性に優れたセラミックス製ローターデ
ィスクを提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and provide a ceramic rotor disk that is lightweight, has high strength, and has excellent durability.
【０００５】[0005]
【課題を解決するための手段】本発明のセラミックス製
ローターディスクは、アルミナ又は窒化珪素よりなるマ
トリックス粉末と、炭化珪素又は窒化珪素よりなる分散
ウィスカーとの複合セラミックス材料を、焼結密度９８
．５％以上に焼結してなるセラミックス製ローターディ
スクであって、前記マトリックス粉末は純度９９％以上
、粒度１μｍ以下の粉末であり、かつ、分散ウィスカー
の割合が複合セラミックス材料の５〜４０重量％である
ことを特徴とする。[Means for Solving the Problems] The ceramic rotor disk of the present invention uses a composite ceramic material of matrix powder made of alumina or silicon nitride and dispersed whiskers made of silicon carbide or silicon nitride, which has a sintered density of 98%.
．． A rotor disk made of ceramics sintered to 5% or more, wherein the matrix powder is a powder with a purity of 99% or more and a particle size of 1 μm or less, and the proportion of dispersed whiskers is 5 to 40% by weight of the composite ceramic material. It is characterized by
【０００６】以下に本発明を詳細に説明する。本発明の
セラミックス製ローターディスクは、アルミナ（Ａｌ２
Ｏ３ ）又は窒化珪素（Ｓｉ３ Ｎ４ ）をマトリッ
クス粉末とし、炭化珪素（ＳｉＣ）ウィスカー又は窒化
珪素（Ｓｉ３ Ｎ４ ）ウィスカーを分散ウィスカーと
する複合セラミックス材料を焼結することにより製造さ
れたローターディスクである。The present invention will be explained in detail below. The ceramic rotor disk of the present invention is made of alumina (Al2
This is a rotor disk manufactured by sintering a composite ceramic material containing silicon carbide (SiC) whiskers or silicon nitride (Si3 N4) whiskers as a matrix powder and silicon carbide (SiC) whiskers or silicon nitride (Si3 N4) whiskers as dispersed whiskers.
【０００７】本発明において、このような複合セラミッ
クス材料中の分散ウィスカーの割合は５〜４０重量％と
する。この割合が５重量％未満では、分散ウィスカーを
用いたことによる改善効果が十分に得られない。逆に、
４０重量％を超えると成形性及び強度が損なわれる。従
って、分散ウィスカーの割合は５〜４０重量％とする。In the present invention, the proportion of dispersed whiskers in such a composite ceramic material is 5 to 40% by weight. If this proportion is less than 5% by weight, the improvement effect due to the use of dispersed whiskers cannot be sufficiently obtained. vice versa,
If it exceeds 40% by weight, moldability and strength will be impaired. Therefore, the proportion of dispersed whiskers is between 5 and 40% by weight.
【０００８】なお、用いる分散ウィスカーの直径及び長
さとしては特に制限はないが、一般には、直径５μｍ以
下、長さ５０μｍ以下のものが好ましい。[0008] There are no particular restrictions on the diameter and length of the dispersion whisker used, but it is generally preferred that the diameter and length be 5 μm or less and the length 50 μm or less.
【０００９】このような複合セラミックス材料は、所望
配合のマトリックス粉末及び分散ウィスカーをボールミ
ル等で十分に混合することにより調製することができる
。[0009] Such a composite ceramic material can be prepared by sufficiently mixing matrix powder and dispersed whiskers of a desired composition using a ball mill or the like.
【００１０】焼結原料として用いるこれらの複合セラミ
ックス材料を構成するマトリックス粉末は、粒度１μｍ
以下の微粒子であり、純度９９％以上の高純度ファイン
セラミックス粉末であることが必要とされる。The matrix powder constituting these composite ceramic materials used as a sintering raw material has a particle size of 1 μm.
It is required to be a high-purity fine ceramic powder with the following fine particles and a purity of 99% or more.
【００１１】本発明のセラミックス製ローターディスク
は、このような焼結原料複合セラミックス材料を、例え
ば、プレス法、湿式吸引プレス法又はＣＩＰ（静水圧プ
レス）法により円盤に成形し、各々の原料セラミックス
に適した焼成方法で９８．５％以上の焼結密度（相対密
度）まで焼成することにより容易に製造することができ
る。ここで、焼成方法には特に制限はなく、常圧焼結や
雰囲気焼結又はＨＰ（熱間プレス）やＨＩＰ（熱間等方
圧プレス）法等を採用することができる。[0011] The ceramic rotor disk of the present invention is produced by forming such a sintered raw material composite ceramic material into a disc by, for example, a pressing method, a wet suction pressing method, or a CIP (hydrostatic pressing) method, It can be easily manufactured by firing to a sintered density (relative density) of 98.5% or more using a firing method suitable for. Here, the firing method is not particularly limited, and pressureless sintering, atmosphere sintering, HP (hot pressing), HIP (hot isostatic pressing) methods, etc. can be adopted.
【００１２】0012
【作用】セラミックス焼結体は、鉄に比べて軽量で耐食
性に優れ、耐摩耗性が高く、高硬度である。特に、アル
ミナ又は窒化珪素をマトリックスとし、炭化珪素ウィス
カー又は窒化珪素ウィスカーが分散したセラミックス焼
結体は、ウィスカーによる補強作用により、軽量、高強
度、高靭性、高耐熱性、高耐食性等、すべての要求特性
が満足される。しかも、本発明で用いる高純度セラミッ
クス微粉末及びウィスカーを高密度に焼結して得られる
焼結体は、軽量、高強度、耐錆等、すべての特性が著し
く優れる。即ち、純度９９％以上の高純度であることか
ら、その素材の優れた特性が十分に発揮される。また、
粒度１μｍ以下の微粉末であることから、高密度焼結が
可能で、焼結密度９８．５％以上の高密度焼結体である
ことから、強度、硬度、耐摩耗性、摩擦性能等の機械的
特性や耐食性に著しく優れたものとなる。[Operation] Ceramic sintered bodies are lighter than iron, have excellent corrosion resistance, high wear resistance, and high hardness. In particular, ceramic sintered bodies with alumina or silicon nitride as a matrix and dispersed with silicon carbide whiskers or silicon nitride whiskers have all the characteristics such as light weight, high strength, high toughness, high heat resistance, and high corrosion resistance due to the reinforcing action of the whiskers. Required characteristics are satisfied. Moreover, the sintered body obtained by sintering the high-purity ceramic fine powder and whiskers used in the present invention at high density is extremely excellent in all properties such as light weight, high strength, and rust resistance. That is, since the material has a high purity of 99% or more, the excellent characteristics of the material can be fully exhibited. Also,
Since it is a fine powder with a particle size of 1 μm or less, high-density sintering is possible, and since it is a high-density sintered body with a sintered density of 98.5% or more, it has excellent properties such as strength, hardness, wear resistance, and friction performance. It has outstanding mechanical properties and corrosion resistance.
【００１３】本発明のセラミックス製ローターディスク
によれば、■従来の鉄製ロータディスクに比べて軽量で
ある。■従来の鉄製ローターディスクのように錆びない
ため、制動メカニズムに問題を発生しない。■鉄製ロー
ターディスクに比べて、ローター表面の硬度が大きく、
付着物その他によりローターにキズが発生しない。■デ
ィスクパッド側の材料の影響が少ない。■高靭性であり
、耐熱性も高く、急速な温度上昇にも十分に耐えられる
。等の作用効果が奏される。According to the ceramic rotor disk of the present invention, (1) it is lighter than the conventional iron rotor disk; ■It does not rust like conventional iron rotor discs, so there are no problems with the braking mechanism. ■The hardness of the rotor surface is greater than that of iron rotor discs,
The rotor will not be scratched by deposits or other debris. ■Less affected by the material on the disc pad side. ■It has high toughness and high heat resistance, and can withstand rapid temperature rises. The following effects are achieved.
【００１４】[0014]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明するが、本発明はその要旨を超えない限
り、以下の実施例に限定されるものではない。[Examples] The present invention will be explained in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples unless it exceeds the gist thereof.
【００１５】実施例１〜３、比較例１
表１に示す複合セラミックス材料を各原料粒子をボール
ミルで２０〜２００時間混合することにより調製した。
この複合セラミックス材料を用いて、機械式プレス、Ｃ
ＩＰ又は湿式吸引プレス法により円盤状に成形した後焼
結し、直径２００ｍｍ、厚さ１０ｍｍのローターディス
クを製造した。なお、プレス圧力は５００〜１５００ｋ
ｇ／ｃｍ２ 、ＣＩＰの成形圧力は１０００〜１５００
ｋｇ／ｃｍ２ 、焼成は各複合セラミックス材料の最適
温度（１６００〜１９００℃）とし、焼結（１８００℃
）による相対密度を９８．５％以上とした。用いた粉末
はいずれも純度９９％以上、粒度１μｍ以下のものであ
り、ウィスカーは直径５μｍ以下、長さ５０μｍ以下の
ものである。得られたローターディスクについて、性能
試験を行ない、従来の鉄製ローターディスク（比較例１
）と比較した。結果を表１に示す。Examples 1 to 3, Comparative Example 1 Composite ceramic materials shown in Table 1 were prepared by mixing raw material particles in a ball mill for 20 to 200 hours. Using this composite ceramic material, mechanical press, C
A rotor disk having a diameter of 200 mm and a thickness of 10 mm was manufactured by molding into a disk shape by IP or wet suction pressing and sintering. In addition, the press pressure is 500 to 1500k.
g/cm2, CIP molding pressure is 1000-1500
kg/cm2, firing at the optimum temperature (1600-1900℃) for each composite ceramic material, and sintering (1800℃).
), the relative density was 98.5% or more. All of the powders used had a purity of 99% or more and a particle size of 1 μm or less, and the whiskers had a diameter of 5 μm or less and a length of 50 μm or less. A performance test was conducted on the obtained rotor disk, and a performance test was conducted on the obtained rotor disk.
) was compared. The results are shown in Table 1.
【００１６】[0016]
【表１】[Table 1]
【００１７】表１より、本発明のセラミックス製ロータ
ーディスクは、摩擦係数は従来の鉄製ローターディスク
とほぼ同程度の良好な値を示し、耐摩耗性が良好で、ま
た、高硬度であることから、耐キズ付き性、耐久性につ
いては鉄製ローターディスクより著しく優れ、しかも、
従来の鉄製ローターディスク重量に比べて１／２以下の
非常に軽量なものであることが明らかである。[0017] From Table 1, the ceramic rotor disk of the present invention has a coefficient of friction that is almost as good as that of the conventional iron rotor disk, has good wear resistance, and has high hardness. In terms of scratch resistance and durability, it is significantly superior to steel rotor discs, and
It is clear that it is extremely lightweight, less than half the weight of a conventional iron rotor disk.
【００１８】また、破壊靭性値が大きく、材料の信頼性
も高いことが明らかである。It is also clear that the fracture toughness value is large and the reliability of the material is also high.
【００１９】[0019]
【発明の効果】以上詳述した通り、本発明のセラミック
ス製ローターディスクによれば、摩擦性能、耐摩耗性、
機械的強度、耐食性、耐久性、耐熱性、材料の信頼性に
優れ、高硬度、高靭性でしかも非常に軽量なローターデ
ィスクが提供される。本発明のセラミックス製ローター
ディスクは、自動車用ディスクブレーキ機構等に用いて
、その軽量化を図ることができ、工業的に極めて有用で
ある。[Effects of the Invention] As detailed above, the ceramic rotor disk of the present invention has excellent friction performance, wear resistance,
Provided is a rotor disk that has excellent mechanical strength, corrosion resistance, durability, heat resistance, and material reliability, has high hardness, high toughness, and is extremely lightweight. The ceramic rotor disk of the present invention can be used in disc brake mechanisms for automobiles, etc. to reduce its weight, and is extremely useful industrially.
Claims (1)
ックス粉末と、炭化珪素又は窒化珪素よりなる分散ウィ
スカーとの複合セラミックス材料を、焼結密度９８．５
％以上に焼結してなるセラミックス製ローターディスク
であって、前記マトリックス粉末は純度９９％以上、粒
度１μｍ以下の粉末であり、かつ、分散ウィスカーの割
合が複合セラミックス材料の５〜４０重量％であること
を特徴とするセラミックス製ローターディスク。Claim 1: A composite ceramic material of a matrix powder made of alumina or silicon nitride and dispersed whiskers made of silicon carbide or silicon nitride has a sintered density of 98.5.
% or more, the matrix powder is a powder with a purity of 99% or more and a particle size of 1 μm or less, and the proportion of dispersed whiskers is 5 to 40% by weight of the composite ceramic material. Ceramic rotor disc with one feature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2406722A JPH04224881A (en) | 1990-12-26 | 1990-12-26 | Rotor disc made of ceramic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2406722A JPH04224881A (en) | 1990-12-26 | 1990-12-26 | Rotor disc made of ceramic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04224881A true JPH04224881A (en) | 1992-08-14 |
Family
ID=18516343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2406722A Withdrawn JPH04224881A (en) | 1990-12-26 | 1990-12-26 | Rotor disc made of ceramic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04224881A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003154927A (en) * | 2001-11-21 | 2003-05-27 | Nsk Ltd | Transceiver device for wheel speed signal |
| WO2022196506A1 (en) * | 2021-03-19 | 2022-09-22 | 日東電工株式会社 | Super water-repellent composition |
-
1990
- 1990-12-26 JP JP2406722A patent/JPH04224881A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003154927A (en) * | 2001-11-21 | 2003-05-27 | Nsk Ltd | Transceiver device for wheel speed signal |
| WO2022196506A1 (en) * | 2021-03-19 | 2022-09-22 | 日東電工株式会社 | Super water-repellent composition |
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