JPH04224880A - Rotor disc made of ceramic - Google Patents
Rotor disc made of ceramicInfo
- Publication number
- JPH04224880A JPH04224880A JP2406721A JP40672190A JPH04224880A JP H04224880 A JPH04224880 A JP H04224880A JP 2406721 A JP2406721 A JP 2406721A JP 40672190 A JP40672190 A JP 40672190A JP H04224880 A JPH04224880 A JP H04224880A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- ceramic
- purity
- rotor disk
- particle size
- 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 description 30
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 25
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 5
- 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
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 5
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052742 iron Inorganic materials 0.000 abstract description 9
- 238000005245 sintering Methods 0.000 abstract description 9
- 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
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000000462 isostatic pressing Methods 0.000 description 4
- 229910018404 Al2 O3 Inorganic materials 0.000 description 3
- 229910007277 Si3 N4 Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000001133 acceleration Effects 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (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、炭化チタン及び窒化チタ
ンよりなる群から選ばれる１種又は２種以上の分散粒子
粉末との複合セラミックス粉末を、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及び分散粒子粉末は純度
９９％以上、粒度１μｍ以下の粉末であり、かつ、分散
粒子の割合が複合セラミックス粉末の５〜３０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 includes a matrix powder made of alumina or silicon nitride, and a dispersion of one or more selected from the group consisting of silicon carbide, titanium carbide, and titanium nitride. Composite ceramic powder with particle powder has a sintered density of 98.5%
A ceramic rotor disk obtained by sintering the above, wherein the matrix powder and the dispersed particle powder have a purity of 99% or more and a particle size of 1 μm or less, and the proportion of the dispersed particles is 5 to 30% of the composite ceramic powder. % by weight.
【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）、炭化チタン（Ｔｉ
Ｃ）及び窒化チタン（ＴｉＮ）よりなる群から選ばれる
１種又は２種以上を分散粒子粉末とする複合セラミック
ス粉末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
O3 ) or silicon nitride (Si3 N4) as matrix powder, silicon carbide (SiC), titanium carbide (Ti
This is a rotor disk manufactured by sintering a composite ceramic powder containing dispersed particle powder of one or more selected from the group consisting of C) and titanium nitride (TiN).
【０００７】本発明において、このような複合セラミッ
クス粉末中の分散粒子粉末の割合は５〜３０重量％とす
る。この割合が５重量％未満では、分散粒子を用いた粒
子分散強化法による改善効果が十分に得られない。逆に
、３０重量％を超えると分散粒子が粒界に析出し高強度
が得られない。従って、分散粒子粉末の割合は５〜３０
重量％とする。In the present invention, the proportion of the dispersed particle powder in such a composite ceramic powder is 5 to 30% by weight. If this proportion is less than 5% by weight, sufficient improvement effects cannot be obtained by the particle dispersion strengthening method using dispersed particles. On the other hand, if it exceeds 30% by weight, dispersed particles will precipitate at the grain boundaries, making it impossible to obtain high strength. Therefore, the proportion of dispersed particle powder is 5 to 30
Weight%.
【０００８】なお、複合セラミックス粉末を構成するマ
トリックス粉末と分散粒子粉末の組み合わせには特に制
限はないが、例えば次のような組み合わせが挙げられる
。
Ａｌ２ Ｏ３ −（ＳｉＣ，ＴｉＣ又はＴｉＮ）Ｓｉ３
Ｎ４ −（ＳｉＣ，ＴｉＣ又はＴｉＮ）Ａｌ２ Ｏ３
−ＳｉＣ−ＴｉＣ
Ｓｉ３ Ｎ４ −ＳｉＣ−ＴｉＣ
このような複合セラミックス粉末は、所望配合のマトリ
ックス粉末及び分散粒子粉末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。[0008] Although there is no particular restriction on the combination of the matrix powder and the dispersed particle powder constituting the composite ceramic powder, the following combinations may be mentioned, for example. Al2 O3 - (SiC, TiC or TiN) Si3
N4 - (SiC, TiC or TiN) Al2 O3
-SiC-TiC Si3 N4 -SiC-TiC Such a composite ceramic powder can be prepared by thoroughly mixing matrix powder and dispersed particle powder of a desired composition using a ball mill or the like.
【０００９】焼結原料として用いるこれらの複合セラミ
ックス粉末を構成するマトリックス粉末及び分散粒子粉
末は、各々、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 and dispersed particle powder constituting these composite ceramic powders used as sintering raw materials are fine particles with a particle size of 1 μm or less, and have a purity of 99%.
% or higher purity fine ceramic powder is required.
【００１０】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粉末を、例え
ば、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ＨＩ
Ｐ（熱間ホットプレス）法等を採用することができる。The ceramic rotor disk of the present invention is produced by forming such a sintered raw material composite ceramic powder into a disk by, for example, a pressing method or a CIP (isostatic pressing) method, and then applying a firing method suitable for each raw material ceramic. It can be easily produced by firing to a sintered density (relative density) of 98.5% or more. Here, there is no particular restriction on the firing method; pressureless sintering, atmosphere sintering, HI
P (hot press) method etc. can be adopted.
【００１１】[0011]
【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、炭化
チタン、窒化チタンが分散したセラミックス焼結体であ
れば、粒子分散強化作用により、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複合セラミックス微
粉末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、各素材の優れた特
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 silicon carbide, titanium carbide, and titanium nitride have properties such as light weight, high strength, high toughness, high heat resistance, and high corrosion resistance due to the particle dispersion strengthening effect. , all required characteristics are satisfied. Moreover, the sintered body obtained by sintering the high-purity composite ceramic fine powder used in the present invention at high density is extremely excellent in all properties such as light weight, high strength, and rust resistance. In other words, since the material has a high purity of 99% or more, the excellent characteristics of each material can be fully exhibited. In addition, since it is a fine powder with a particle size of 1 μm or less, high-density sintering is possible, with a sintered density of 98.
Since it is a high-density sintered body with a density of 5% or more, the strength, hardness,
It has extremely excellent mechanical properties such as wear resistance and friction performance, and corrosion resistance.
【００１２】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.
【００１３】[0013]
【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.
【００１４】実施例１〜５、比較例１
表１に示す複合セラミックス原料粉末を各原料粒子をボ
ールミルで５０〜２００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粉末を用いて、機械式プレス
又はＣＩＰにより円盤状に成形した後ＨＩＰ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５００〜１５００ｋｇ／ｃｍ
２ 、ＣＩＰの成形圧力は１０００〜１５００ｋｇ／ｃ
ｍ２ 、焼結は各複合セラミックス粉末の最適温度（１
６００〜１９００℃）とし、焼結による相対密度を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 5, Comparative Example 1 Composite ceramic raw material powders shown in Table 1 were prepared by mixing each raw material particle in a ball mill for 50 to 200 hours. Using this composite ceramic powder, it was formed into a disk shape by mechanical pressing or CIP, and then HIP sintered to produce a rotor disk having a diameter of 200 mm and a thickness of 10 mm. In addition, the press pressure is 500 to 1500 kg/cm
2. CIP molding pressure is 1000-1500kg/c
m2, sintering is performed at the optimum temperature (1
600-1900℃), and the relative density by sintering is 98
．． It was set at 5% or more. All of the powders used had a purity of 99% or more and a particle size of 1 μm or less. The obtained rotor disk was subjected to a performance test and compared with a conventional iron rotor disk (Comparative Example 1). The results are shown in Table 1.
【００１５】[0015]
【表１】[Table 1]
【００１６】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。[0016] From Table 1, the ceramic rotor disk of the present invention has a coefficient of friction 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.
【００１７】また、破壊靱性値が大きく、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.
【００１８】[0018]
【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、炭化チタン及び窒化チタンよ
りなる群から選ばれる１種又は２種以上の分散粒子粉末
との複合セラミックス粉末を、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及び分散粒子粉末は純度９９
％以上、粒度１μｍ以下の粉末であり、かつ、分散粒子
の割合が複合セラミックス粉末の５〜３０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 powder of a matrix powder made of alumina or silicon nitride and one or more dispersed particle powders selected from the group consisting of silicon carbide, titanium carbide, and titanium nitride is prepared at a sintered density of 98. A rotor disk made of ceramics sintered to a purity of .5% or more, wherein the matrix powder and the dispersed particle powder have a purity of 99%.
% or more and a particle size of 1 μm or less, and the proportion of dispersed particles is 5 to 30% by weight of the composite ceramic powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2406721A JPH04224880A (en) | 1990-12-26 | 1990-12-26 | Rotor disc made of ceramic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2406721A JPH04224880A (en) | 1990-12-26 | 1990-12-26 | Rotor disc made of ceramic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04224880A true JPH04224880A (en) | 1992-08-14 |
Family
ID=18516341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2406721A Pending JPH04224880A (en) | 1990-12-26 | 1990-12-26 | Rotor disc made of ceramic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04224880A (en) |
-
1990
- 1990-12-26 JP JP2406721A patent/JPH04224880A/en active Pending
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