JPH0440315B2 - - Google Patents
Info
- Publication number
- JPH0440315B2 JPH0440315B2 JP19111887A JP19111887A JPH0440315B2 JP H0440315 B2 JPH0440315 B2 JP H0440315B2 JP 19111887 A JP19111887 A JP 19111887A JP 19111887 A JP19111887 A JP 19111887A JP H0440315 B2 JPH0440315 B2 JP H0440315B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- metal
- metal composite
- edge portion
- piston
- 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
Links
- 239000000919 ceramic Substances 0.000 claims description 56
- 239000002184 metal Substances 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002905 metal composite material Substances 0.000 claims description 29
- 230000035882 stress Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- LTPBRCUWZOMYOC-UHFFFAOYSA-N Beryllium oxide Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 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
- 230000032683 aging Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910001293 incoloy Inorganic materials 0.000 description 2
- 230000013011 mating Effects 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
- 230000003746 surface roughness Effects 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 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- -1 sialon Chemical compound 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0085—Materials for constructing engines or their parts
- F02F7/0087—Ceramic materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Ceramic Products (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はセラミツクスと金属との結合体に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a composite of ceramics and metal.
（従来の技術）
従来、セラミツクスと金属との結合体として
は、第９図にその部分断面を示すように金属製部
材１の結合端面に凹部２を形成して、その凹部２
内に結合すべきセラミツク製部材３の突部４を嵌
合して結合するのが一般的であつた。(Prior Art) Conventionally, as a combined body of ceramics and metal, a recess 2 is formed on the joint end surface of a metal member 1, as shown in a partial cross section in FIG.
It has been common practice to fit the protrusion 4 of the ceramic member 3 to be connected therein.
（発明が解決しようとする問題点）
上述した構造の従来のセラミツクス・金属結合
体においては、嵌合端５に加わる圧縮力のためセ
ラミツク製部材中に著しい応力集中が発生し、そ
の結果、曲げやねじりに対して弱く結合体の破壊
につながることもあり、信頼性の高いセラミツク
ス・金属結合体を得ることができない欠点があつ
た。(Problems to be Solved by the Invention) In the conventional ceramic-metal composite having the structure described above, significant stress concentration occurs in the ceramic member due to the compressive force applied to the mating end 5, resulting in bending. This has the disadvantage that it is not possible to obtain a highly reliable ceramic-metal composite because it is weak against twisting and twisting, which can lead to destruction of the composite.
本発明の目的は、上述した不具合を解消して、
結合によるセラミツク製部材に加わる応力集中が
小さく、その結果、破壊しにくく信頼性の高いセ
ラミツクス・金属結合体を提供しようとするもの
である。 The purpose of the present invention is to solve the above-mentioned problems,
The present invention aims to provide a ceramic-metal bonded body which has a small stress concentration applied to ceramic members due to bonding, and is, as a result, hard to break and highly reliable.
（問題点を解決するための手段）
本発明のセラミツクス・金属結合体は、セラミ
ツク製部材の全部もしくは一部を金属製部材に設
けられた貫通孔もしくは凹部に嵌合により結合し
たセラミツクス・金属結合体において、該セラミ
ツク製部材のエツヂ部もしくは該セラミツク製部
材の実質的全周にわたつて設けた溝のエツヂ部が
丸められ、かつ、該エツヂ部が前記金属製部材の
貫通孔もしくは凹部に対して嵌合端となるように
セラミツク製部材を配置するようにしたことを特
徴とするものであり、好ましくは、前記セラミツ
ク製部材と金属製部材との間に低熱膨張金属から
なる中間部材を設けることを特徴とする。(Means for Solving the Problems) The ceramic-metal composite of the present invention is a ceramic-metal composite in which all or part of a ceramic member is fitted into a through hole or a recess provided in a metal member. In the body, the edge portion of the ceramic member or the edge portion of the groove provided over substantially the entire circumference of the ceramic member is rounded, and the edge portion is aligned with the through hole or recess of the metal member. It is characterized in that the ceramic member is arranged so as to form a mating end, and preferably an intermediate member made of a low thermal expansion metal is provided between the ceramic member and the metal member. It is characterized by
（作 用）
上述した構造のセラミツクス・金属結合体にお
いて、セラミツク製部材のエツヂ部もしくはセラ
ミツク製部材の実質的全周にわたつて設けた溝の
エツヂ部が丸められ、かつ、前記エツヂ部が金属
製部材の貫通孔もしくは凹部に対し嵌合端となる
ように構成することにより、従来生じていたかん
合端の応力集中が緩和され、エツヂ部のチツピン
グを生ぜず、また曲げあるいはねじりに対する強
度および信頼性が上がる。(Function) In the ceramic-metal composite having the above-described structure, the edge portion of the ceramic member or the edge portion of the groove provided over substantially the entire circumference of the ceramic member is rounded, and the edge portion is made of metal. By configuring the fitting end to fit into the through hole or recess of the manufactured member, the stress concentration at the fitting end that conventionally occurs is alleviated, chipping of the edge part does not occur, and the strength against bending or torsion is improved. Increases reliability.
（実施例）
つぎに、図面により本発明をさらに詳しく説明
する。第１図ないし第３図は本発明のセラミツク
ス・金属結合体の具体例の構造を示したものであ
る。(Example) Next, the present invention will be explained in more detail with reference to the drawings. 1 to 3 show the structure of a specific example of the ceramic-metal composite of the present invention.
第１図は、円柱状の金属製部材１１に設けた凹
部１２に円柱状のセラミツク製部材１３に設けた
凸部１４が嵌合されている本発明のセラミツク
ス・金属結合体の一具体例の部分断面図である。 FIG. 1 shows a specific example of the ceramic-metal composite of the present invention, in which a convex portion 14 provided on a cylindrical ceramic member 13 is fitted into a recess 12 provided on a cylindrical metal member 11. FIG.
このセラミツクス・金属結合体では、セラミツ
ク製部材１３の外径より小さい小径部即ち凸部１
４の、嵌合端近傍にその周面の実質的全周にわた
り溝１５を設け、この溝１５の端部（エツヂ部）
１６が嵌合端１７になるように、金属製部材１１
のスリーブ部、即ち凹部１２が位置するように凸
部１４が結合されている。前記溝１５の端部１６
は本発明により所定の曲率半径で丸められてい
る。 In this ceramic-metal composite, a small diameter portion, that is, a convex portion 1 smaller than the outer diameter of the ceramic member 13
A groove 15 is provided near the fitting end of No. 4 over substantially the entire circumference of the circumferential surface, and the end portion (edge portion) of this groove 15
Metal member 11 such that 16 becomes the fitting end 17
The convex portion 14 is connected such that the sleeve portion, that is, the concave portion 12 is positioned. End 16 of the groove 15
is rounded with a predetermined radius of curvature according to the invention.
第２図は、同じく、角柱状の金属製部材２１に
設けた凹部２２に、角柱状のセラミツク製部材２
３が嵌合されているセラミツクス・金属結合体の
部分断面図である。 FIG. 2 similarly shows that a prismatic ceramic member 2 is inserted into a recess 22 provided in a prismatic metal member 21.
FIG. 3 is a partial cross-sectional view of a ceramic-metal composite body in which parts No. 3 are fitted.
このセラミツクス・金属結合体では、角柱状の
セラミツク製部材２３の縦方向に段差が設けられ
ており、その縦方長さの大きい部分２４が金属製
部材２１のその断面が矩形である凹部に嵌まり込
んでいる。段差が設けられた部分２５の金属製部
材２１と接する側の幅方向に延在するエツヂ部２
６は、本発明により所定の曲率半径で丸め加工が
施されている。 In this ceramic/metal composite, a step is provided in the vertical direction of a prismatic ceramic member 23, and a portion 24 having a large vertical length fits into a recess of the metal member 21 whose cross section is rectangular. I'm completely absorbed in it. Edge portion 2 extending in the width direction on the side of the stepped portion 25 that is in contact with the metal member 21
6 is rounded with a predetermined radius of curvature according to the present invention.
第３図ａ，ｂは、中心に貫通孔３１を有する円
筒状の金属製部材３２の貫通孔３１に、中心に貫
通孔３３を有するリング状のセラミツク製部材３
４が嵌合されているセラミツクス・金属結合体の
具体例の縦断面図および横断面図である。 FIGS. 3a and 3b show a ring-shaped ceramic member 3 having a through hole 33 in the center and a through hole 31 in a cylindrical metal member 32 having a through hole 31 in the center.
FIG. 4 is a vertical cross-sectional view and a cross-sectional view of a specific example of a ceramic-metal composite body in which the parts 4 and 4 are fitted.
このセラミツクス・金属結合体では、セラミツ
ク製部材３４の端面３５，３６の外周のエツヂ部
３７，３８に、その全周にわたつて本発明により
所定の曲率半径で丸め加工が施されている。 In this ceramic/metal composite, the edge portions 37 and 38 on the outer periphery of the end faces 35 and 36 of the ceramic member 34 are rounded at a predetermined radius of curvature over the entire circumference thereof according to the present invention.
以上、３種類の形状のセラミツクス・金属結合
体のエツヂ部に丸みを設けた例を示したが、本発
明は上記例に限定されるものではなく、他の形状
のセラミツクス・金属結合体にも応用することが
できる。 Above, examples have been shown in which the edges of ceramic-metal composite bodies of three types are rounded, but the present invention is not limited to the above examples, and can also be applied to ceramic-metal composite bodies of other shapes. It can be applied.
以下に、本発明のセラミツクス・金属結合体の
エツヂ部の丸みの大きさと引張り強度との関係を
示す実施例と、本発明の応用例を示す。 Examples illustrating the relationship between the roundness of the edge portion and the tensile strength of the ceramic-metal composite of the present invention and application examples of the present invention will be shown below.
実施例 １
第４図に示す形状のSi3N4よりなるセラミツク
製部材４１、インコロイ903（商品名）よりなる中
間部材４２およびSNCM４３９よりなる金属製
部材４３よりなる引張試験体を圧入し、720℃８
時間、620℃８時間の時効処理後加工して作成し、
図示した荷重Ｐを負荷して、エツヂ部の最大曲率
半径Ｒを変化させたときの破断荷重を測定した。
その結果を第５図に示す。なお、圧入部の形状
は、セラミツク製部材の凸部直径dc＝10mm、中
間部材の外径Dm＝15mm、圧入距離６mmであり、
試験後引き抜き、中間部材の内径dnとセラミツ
ク製部材凸部直径dcを測定した結果、（dc−
dn）／dc＝５
％であつた。Example 1 A tensile test specimen consisting of a ceramic member 41 made of Si 3 N 4 having the shape shown in Figure 4, an intermediate member 42 made of Incoloy 903 (trade name), and a metal member 43 made of SNCM439 was press-fitted, ℃8
Created by processing after aging treatment at 620℃ for 8 hours,
The breaking load was measured when the illustrated load P was applied and the maximum radius of curvature R of the edge portion was varied.
The results are shown in FIG. The shape of the press-fitting part is as follows: diameter of the convex part of the ceramic member dc = 10mm, outer diameter Dm of the intermediate member = 15mm, press-fitting distance 6mm,
After the test, we pulled it out and measured the inner diameter d n of the intermediate member and the diameter d c of the convex part of the ceramic member. As a result, (d c −
d n )/d c =5%.
第５図から明らかなように、本発明により溝の
エツヂ部を丸めたセラミツクス・金属結合体の引
張強度は、エツヂ部の最大曲率半径Ｒが0.1mm以
上で十分な引張強度が得られた。 As is clear from FIG. 5, sufficient tensile strength was obtained for the ceramic-metal composite in which the groove edges were rounded according to the present invention when the maximum radius of curvature R of the edge portion was 0.1 mm or more.
実施例 ２
第６図は、本発明をセラミツク製ターボチヤー
ジヤロータに応用した例を示す部分断面図であ
る。本実施例では、直径41mmのSi3N4よりなるダ
ービンホイール５１を外径10mmの太軸部５２にお
いて、インコロイ903よりなる外径15mmの中間部
材５３と圧入し、720℃８時間、620℃８時間の時
効処理後加工して作製し、中間部材５３は
SNCM４３９よりなる金属製軸５４に摩擦圧接
により接合されている。さらに、本実施例では、
セラミツク製軸の細軸部５７の全周にわたつて深
さａ＝0.5mmの溝５５を設け、溝のエツヂ部５６
が嵌合端になるように中間部材５３の凹部５８が
位置しており、溝５５のエツヂ部の全周にわたつ
て最大曲率半径0.2mmの丸め加工を施した。Embodiment 2 FIG. 6 is a partial sectional view showing an example in which the present invention is applied to a ceramic turbocharger rotor. In this example, a durbin wheel 51 made of Si 3 N 4 with a diameter of 41 mm is press-fitted into an intermediate member 53 made of Incoloy 903 with an outer diameter of 15 mm at a thick shaft portion 52 with an outer diameter of 10 mm, and heated at 720° C. for 8 hours at 620° C. The intermediate member 53 is manufactured by processing after 8 hours of aging treatment.
It is joined to a metal shaft 54 made of SNCM439 by friction welding. Furthermore, in this example,
A groove 55 with a depth a of 0.5 mm is provided around the entire circumference of the thin shaft portion 57 of the ceramic shaft, and an edge portion 56 of the groove is provided.
The recess 58 of the intermediate member 53 is located such that the fitting end is the fitting end, and the edge of the groove 55 is rounded to a maximum radius of curvature of 0.2 mm over the entire circumference.
このセラミツク製ターボチヤージヤロータを高
速回転試験装置に組み込んで800℃の燃焼ガスに
より、100000rpmの回転数で50時間の回転試験を
行つたが何ら異常は認められなかつた。 This ceramic turbocharger rotor was installed in a high-speed rotation test device, and a rotation test was conducted at a rotation speed of 100,000 rpm for 50 hours using combustion gas at 800°C, but no abnormalities were observed.
上述した結果から、セラミツク製部材と金属製
部材との間に低熱膨張金属からなる中間部材を設
けたことにより、室温から高温までの広い温度範
囲において十分な結合強度を維持でき、また、セ
ラミツク製部材の凸部の全周にわたつて設けた溝
のエツヂ部に丸め加工を施し、溝の端部が嵌合端
になるように中間部材の凹部が位置するように構
成することにより、結合部の強度が高められるの
が確かめられた。 From the above results, by providing an intermediate member made of a low thermal expansion metal between the ceramic member and the metal member, it is possible to maintain sufficient bonding strength in a wide temperature range from room temperature to high temperature. By rounding the edges of the groove provided around the entire circumference of the convex part of the member, and configuring the concave part of the intermediate member so that the end of the groove becomes the fitting end, the joint part It was confirmed that the strength of
実施例 ３
第７図は、本発明をセラミツクバルブシートに
応用した例を示す部分断面図である。この図にお
いて、セラミツクバルブシート６１は、シリンダ
ヘツド６２にセラミツク製、例えば窒化ケイ素製
のリング６４をバルブ６３とともに組み込んで構
成される。このように構成してなる本発明のセラ
ミツクバルブシートを以下のように作製して、そ
の耐久試験を行つた。Embodiment 3 FIG. 7 is a partial sectional view showing an example in which the present invention is applied to a ceramic valve seat. In this figure, a ceramic valve seat 61 is constructed by incorporating a ring 64 made of ceramic, for example, silicon nitride, into a cylinder head 62 together with a valve 63. The ceramic valve seat of the present invention having the above-mentioned structure was manufactured in the following manner, and its durability test was conducted.
まず、内径25mm、外径33mm、高さ7.5mmのセラ
ミツク製リング６４を窒化ケイ素により常圧焼結
法で作製した。このセラミツク製リング６４は、
各面を表面粗さの仕上げ記号1.6μmRaに仕上げ
た。このセラミツク製リング６４はエツヂ部６６
を最大曲率半径0.3mmＲの加工を施して、本発明
のセラミツクバルブシート６１を得た。なお、当
接面の表面粗さは、0.2μmRaとした。得られた
バルブシート６１をエンジンヘツドへの取り付け
穴に0.01mmの嵌め代にて圧入により装着した。 First, a ceramic ring 64 having an inner diameter of 25 mm, an outer diameter of 33 mm, and a height of 7.5 mm was manufactured from silicon nitride by pressureless sintering. This ceramic ring 64 is
Each surface was finished to a surface roughness of 1.6μmRa. This ceramic ring 64 has an edge portion 66.
was processed to a maximum radius of curvature of 0.3 mmR to obtain a ceramic valve seat 61 of the present invention. Note that the surface roughness of the contact surface was 0.2 μmRa. The obtained valve seat 61 was press-fitted into the mounting hole of the engine head with a fitting allowance of 0.01 mm.
セラミツクバルブシートを装着したシリンダヘ
ツドを直径70mm、ストローク75mmの台上試験用デ
イーゼルエンジンに組みつけて、回転数2200rpm
で50時間運転しても何ら異常は認められなかつ
た。一方、エツヂ部６６を丸めなかつたものは回
転数2200rpmの運転条件で耐久試験を行つたが５
時間後にエツヂ部６６にチツピングの発生が認め
られた。 A cylinder head equipped with a ceramic valve seat was assembled into a bench test diesel engine with a diameter of 70 mm and a stroke of 75 mm, and the rotation speed was 2200 rpm.
No abnormalities were observed even after 50 hours of operation. On the other hand, the durability test was conducted on the one in which the edge part 66 was not rounded under the operating condition of 2200 rpm.
After some time, chipping was observed at the edge portion 66.
実施例 ４
第８図は本発明をピストンに応用した例を示す
部分断面図である。外径15mm、長さ20mmの円柱状
の凸部７２を有するSi3N4よりなるピストンキヤ
ツプ７１を作製した。また、球状黒鉛鋳鉄で外径
35mm、内径14.8mm、長さ18mmのフランジ部を有す
る金属製部材７４を作製した。次に、金属製部材
７４の貫通孔７７にピストンキヤツプ７１の円柱
状凸部７２を350℃で圧入により嵌合し、嵌合端
７５からピストンキヤツプ７１の上部に向つてピ
ストンキヤツプ７１の円柱状凸部７２の全周にわ
たつて溝７６を設け、さらに本発明により溝７６
のエツヂ部８０に最大曲率半径0.5mmの丸め加工
を施してセラミツクス・金属結合体を作製した。Embodiment 4 FIG. 8 is a partial sectional view showing an example in which the present invention is applied to a piston. A piston cap 71 made of Si 3 N 4 having a cylindrical convex portion 72 with an outer diameter of 15 mm and a length of 20 mm was prepared. In addition, the outer diameter is made of spheroidal graphite cast iron.
A metal member 74 having a flange portion having a diameter of 35 mm, an inner diameter of 14.8 mm, and a length of 18 mm was manufactured. Next, the cylindrical convex portion 72 of the piston cap 71 is press-fitted into the through hole 77 of the metal member 74 at 350° C., and the cylindrical convex portion 72 of the piston cap 71 is inserted from the fitting end 75 toward the top of the piston cap 71. A groove 76 is provided around the entire circumference of the convex portion 72, and the groove 76 is further provided according to the present invention.
A ceramic-metal composite was produced by rounding the edge portion 80 to a maximum radius of curvature of 0.5 mm.
一方、直径70mmの球状黒鉛鋳鉄製ピストン７３
のピストンクラウン７８に、このセラミツクス・
金属結合体が嵌め込み可能な段差を有する空所７
９を設けて、これらピストンクラウン７８とセラ
ミツクス・金属結合体とを嵌め合わせて第８図に
示すような形状の断熱エンジン用ピストンを作製
した。このピストンは、直径70mm、ストローク75
mm、回転数2200rpmのデイーゼルエンジンで５時
間運転しても何ら異常は認められなかつた。 On the other hand, a piston 73 made of spheroidal graphite cast iron with a diameter of 70 mm
The piston crown 78 is made of this ceramic material.
Vacant space 7 having a step into which a metal composite can be fitted
9 were provided, and these piston crowns 78 and the ceramic/metal composite were fitted together to produce a piston for an adiabatic engine having a shape as shown in FIG. 8. This piston has a diameter of 70mm and a stroke of 75
mm, no abnormality was observed even after 5 hours of operation with a diesel engine with a rotation speed of 2200 rpm.
本発明は上述した実施例にのみ限定されるもの
ではなく、幾多の変形、変更が可能である。例え
ば、上述した実施例ではセラミツクスとしてSi3
N4を用いたがこれに限定されるものではなく、
炭化珪素、サイアロン、ムライト、アルミナ、ベ
リリア、ジルコニア等も使用できる。また、金属
製部材としても上述した実施例に限定されること
なく他の金属も使用できることはいうまでもな
い。 The present invention is not limited only to the embodiments described above, and numerous modifications and changes are possible. For example, in the above embodiment, Si 3 is used as the ceramic.
Although N4 was used, it is not limited to this,
Silicon carbide, sialon, mullite, alumina, beryllia, zirconia, etc. can also be used. Furthermore, it goes without saying that the metal members are not limited to the embodiments described above, and other metals can also be used.
（発明の効果）
以上詳細に説明したところから明らかなよう
に、本発明のセラミツクス・金属結合体によれ
ば、セラミツク製部材のエツヂ部もしくはセラミ
ツク製部材の実質的全周にわたつて設けた溝のエ
ツヂ部が丸められ、かつ溝に対応する位置に嵌合
端を設けることにより、セラミツク製部材の溝の
エツヂ部の応力集中が回避され、信頼製の高いセ
ラミツクス・金属結合体を得ることができる。(Effects of the Invention) As is clear from the above detailed explanation, according to the ceramic-metal composite of the present invention, the grooves provided at the edge portion of the ceramic member or over substantially the entire circumference of the ceramic member By rounding the edges and providing a fitting end at a position corresponding to the groove, stress concentration at the edge of the groove of the ceramic member is avoided, making it possible to obtain a highly reliable ceramic-metal composite. can.
第１図乃至第３図は本発明のセラミツクス・金
属結合体の具体例を示す部分断面図、第４図は本
発明の丸め加工を施した引張試験体を示す部分断
面図、第５図は上記引張試験体における引張荷重
とエツヂ部の最大曲率半径との関係を示すグラフ
図、第６図は本発明をセラミツク製ターボチヤー
ジロータに応用した例を示す部分断面図、第７図
は本発明をセラミツクバルブシートに応用した例
を示す部分断面図、第８図は本発明をセラミツク
ピストンキヤツプに応用した例を示す部分断面
図、第９図は従来のセラミツクス・金属結合体の
一実施例を示す部分断面図である。
１，１１，２１，３１……金属製部材、２，１
２，２２，３２……凹部、３，１３，２３，３３
……セラミツク製部材、１６，２６，３７，３８
……エツヂ部。
1 to 3 are partial cross-sectional views showing specific examples of the ceramic-metal composite of the present invention, FIG. 4 is a partial cross-sectional view showing a tensile test specimen subjected to rounding according to the present invention, and FIG. A graph showing the relationship between the tensile load and the maximum radius of curvature of the edge portion in the above tensile test specimen, FIG. 6 is a partial cross-sectional view showing an example of applying the present invention to a ceramic turbocharger rotor, and FIG. FIG. 8 is a partial sectional view showing an example in which the invention is applied to a ceramic valve seat, FIG. 8 is a partial sectional view showing an example in which the invention is applied to a ceramic piston cap, and FIG. 9 is an example of a conventional ceramic-metal combination. FIG. 1, 11, 21, 31...metal member, 2, 1
2, 22, 32... recess, 3, 13, 23, 33
...Ceramic members, 16, 26, 37, 38
...Etsujibe.
Claims (1)
製部材に設けられた貫通孔もしくは凹部に嵌合に
より結合したセラミツクス・金属結合体におい
て、該セラミツク製部材のエツヂ部もしくは該セ
ラミツク製部材の実質的全周にわたつて設けた溝
のエツヂ部が丸められ、かつ、該エツヂ部が前記
金属製部材の貫通孔もしくは凹部に対し嵌合端と
なるようにセラミツク製部材を配置するようにし
たことを特徴とするセラミツクス・金属結合体。 ２ 前記セラミツク製部材と金属製部材との間に
低熱膨張金属からなる中間部材を設けることを特
徴とする特許請求の範囲第１項記載のセラミツク
ス・金属結合体。 ３ 前記セラミツク製部材の金属製部材への嵌合
が、圧入、焼き嵌め、冷やし嵌め、あるいはこれ
らの組合せであることを特徴とする特許請求の範
囲第１項または第２項記載のセラミツクス・金属
結合体。 ４ 前記セラミツクス・金属結合体がターボチヤ
ージヤロータもしくはガスタービンロータの回転
軸であることを特徴とする特許請求の範囲第１項
乃至第３項の何れか一項に記載のセラミツクス・
金属結合体。 ５ 前記セラミツクス・金属結合体がピストンを
構成し、該ピストンのピストンヘツドの一部もし
くは全部を前記セラミツク製部材で構成し、前記
ピストンのピストンヘツド以外のピストン本体の
全部若しくは一部を金属製部材で構成することを
特徴とする特許請求の範囲第１項乃至第３項の何
れか一項に記載のセラミツクス・金属結合体。 ６ 前記セラミツク製部材がバルブシート、前記
金属製部材がシリンダヘツドであることを特徴と
する特許請求の範囲第１項乃至第３項の何れか一
項に記載のセラミツクス・金属結合体。[Scope of Claims] 1. A ceramic-metal composite in which all or part of a ceramic member is fitted into a through hole or a recess provided in a metal member, wherein the edge portion of the ceramic member or the ceramic The ceramic member is arranged so that the edge portion of the groove provided over substantially the entire circumference of the ceramic member is rounded, and the edge portion is the end that fits into the through hole or recess of the metal member. A ceramic-metal composite characterized by the following characteristics: 2. The ceramic-metal composite according to claim 1, wherein an intermediate member made of a low thermal expansion metal is provided between the ceramic member and the metal member. 3. The ceramic/metal according to claim 1 or 2, wherein the ceramic member is fitted to the metal member by press fitting, shrink fitting, cold fitting, or a combination thereof. conjugate. 4. The ceramic-metal assembly according to any one of claims 1 to 3, wherein the ceramic-metal composite is a rotating shaft of a turbocharger rotor or a gas turbine rotor.
Metallic combination. 5. The ceramic/metal combination constitutes a piston, a piston head of the piston is partially or entirely made of the ceramic member, and all or a part of the piston body other than the piston head is made of a metal member. A ceramic-metal composite according to any one of claims 1 to 3, characterized in that the ceramic-metal composite is comprised of: 6. The ceramic-metal composite according to any one of claims 1 to 3, wherein the ceramic member is a valve seat and the metal member is a cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19111887A JPS6433081A (en) | 1987-07-30 | 1987-07-30 | Ceramic-metal coupling body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19111887A JPS6433081A (en) | 1987-07-30 | 1987-07-30 | Ceramic-metal coupling body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6433081A JPS6433081A (en) | 1989-02-02 |
| JPH0440315B2 true JPH0440315B2 (en) | 1992-07-02 |
Family
ID=16269166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19111887A Granted JPS6433081A (en) | 1987-07-30 | 1987-07-30 | Ceramic-metal coupling body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6433081A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5538569B2 (en) * | 2010-02-19 | 2014-07-02 | ボーグワーナー インコーポレーテッド | Turbine wheel and method for manufacturing a turbine wheel |
-
1987
- 1987-07-30 JP JP19111887A patent/JPS6433081A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6433081A (en) | 1989-02-02 |
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