EP0111989B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An engine part having a ceramics member and a metallic member joined together
Assignee: NGK Insulators Ltd
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Filing: 1983-05-18
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Granted: 1987-08-19
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Expires: 2003-05-18
Abstract
Abstract The disclosed engine part uses an integral combination of a ceramic member and a metallic member, which ceramic member has a metallized layer formed on one side surface thereof, and a metallic buffer is bonded to the metallized layer so as to be disposed between the ceramic member and the metallic member.
Inventors
- 👤 Minoru Matsui
- 👤 Nobuo Tsuno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 04:51
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/10; F02F3/12; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; F01; F01L; F01L7/00; F01L7/14; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0603; F02B23/0696; F02F7/00; F02F7/0085; F02F7/0087; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/123; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/345; C04B2237/348; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/76; F02B2023/0612; F02B23/0645; F02B23/0654; F02B3/00; F02B3/06; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448; F05C2203/00; F05C2203/08; F05C2203/0865; F05C2203/0895; F05C2251/00; F05C2251/04; F05C2251/042; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618; Y10T428/12771; Y10T428/12861; Y10T428/12951
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
An engine part comprising a ceramic member (1, 12) and a metallic member (6, 13) joined thereto, wherein the ceramic member (1, 12) has a metallized layer (2) formed on the surface thereof which is joined to the metallic member and a metallic buffer (3) is joined to the metallized layer (2) and to the metallic member, characterised in that the coefficient of thermal expansion of the metallic member (6, 13) is greater than that of the ceramic member (1, 12), the metallized layer (2) of the ceramic member has a metal-plated surface and the metallic buffer has a coefficient of thermal expansion substantially equivalent to or smaller than that of the ceramics member (1, 12) and is bonded to the metal-plated surface of the metallized layer, whereby the metallic member is integrally joined to the ceramics member with the metallized layer (2), the metal-plated surface thereof and the metallic buffer disposed between the metallic member and the ceramic member.
Claim 2
Dependent Claim
160 words
An engine part comprising a ceramic member (1, 12) and a metallic member (6, 13) joined thereto, wherein the ceramic member (1, 12) has a metallized layer (2) formed on the surface thereof which is joined to the metallic member and a metallic buffer (3) is joined to the metallized layer (2) and to the metallic member, characterised in that the coefficient of thermal expansion of the metallic member (6, 13) is greater than that of the ceramic member (1, 12), the metallized layer (2) of the ceramic member has a metal-plated surface and the metallic buffer has a coefficient of thermal expansion substantially equivalent to or smaller than that of the ceramics member (1, 12) and is bonded to the metal-plated surface of the metallized layer, whereby the metallic member is integrally joined to the ceramics member with the metallized layer (2), the metal-plated surface thereof and the metallic buffer disposed between the metallic member and the ceramic member.
Claim 3
Dependent Claim
44 words
An engine part according to claim 1 wherein the joint between the metallic buffer (3) and the metallic member (6, 13) is formed by one of brazing, diffusion bonding, welding and insert casting, or the metallic buffer and the metallic member are bolted together.
Claim 4
Dependent Claim
53 words
An engine part according to claim 1 or claim 2 wherein the metallic buffer (3) has a coefficient of thermal expansion which is less than 14x10- 6 ( O C- 1 ) and is made of titanium, a titanium alloy, ferritic stainless steel, an iron-chromium alloy, an iron-chromium-nickel alloy, or an iron-nickel alloy.
Claim 5
Dependent Claim
46 words
An engine part according to any one of claims 1 to 3 wherein the area of bonding between the metallic buffer (3) and the ceramics member (1, 12) is larger than the area of bonding between the metallic buffer (3) and the metallic member (6, 13).
Claim 6
Dependent Claim
34 words
An engine part according to any one of claims 1 to 4 wherein the ceramics member (1, 12) is made of zirconia ceramics and the metallic member (6, 13) is made of cast iron.
Claim 7
Dependent Claim
32 words
An engine part according to any one of claims 1 to 4 wherein the ceramics member (1, 12) is a piston crown and the metallic member (6, 13) is a piston skirt.
Claim 8
Dependent Claim
32 words
An engine part according to any one of claims 1 to 4 wherein the ceramics member is a cam contact surface member (12) and the metallic member is a tappet body (13).
Claim 9
Dependent Claim
31 words
An engine part according to claim 6 or claim 7 wherein the metallic buffer is made of titanium or a titanium alloy, while the ceramics member is made of zirconia ceramics.
References Cited (Backward Citations)
No citation records indexed.
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