Patent US4885213A successfully refreshed from Google Patents.
US4885213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic-sprayed member and process for making the same
Assignee: Toyota Motor Corp
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Filing: 1988-04-28
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Granted: 1989-12-05
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Expires: 2008-04-28
Abstract
Abstract A sprayed member which has a ceramic-sprayed layer formed on the surface of a parent material of an aluminum alloy through a sprayed bond layer. A diffusion layer occupies 20 to 50% of the entire interface between the bond layer and the parent material. The interface between the diffusion layer and the parent material and the interface between the bond layer and the parent material are finely roughened to have a height of several microns. The diffusion layer and the fine roughness are formed by preheating the surface of the parent material at a temperature ranging from 260° to 500° C. prior to spraying the parent material with a material for the bond layer so that they can together enhance the adherency between the bond layer and the parent material.
Inventors
- 👤 Noritaka Miyamoto
- 👤 Miyuki Koujiya
- 👤 Joji Miyake
- 👤 Takashi Iomoda
- 👤 Hidetoshi Ohsawa
- 👤 Tetsuo Nagami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:08
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/02; C23C28/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12472; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618; Y10T428/12736; Y10T428/1275; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A ceramic-sprayed member having a ceramic-sprayed layer on the surface of a parent material of an aluminum alloy with an intermediate sprayed bond layer which is made of an alloy having a coefficient of thermal expansion intermediate between those of the aluminum alloy of the parent material and the ceramic of the ceramic-sprayed layer, to provide excellent adherency of the parent material surface to the ceramic; the improvement comprising a diffusion layer in which the components of said bond layer and said parent material are diffused into each other, said diffusion layer being formed in an interface between said bond layer and said parent material and occupying 20 to 50% of said interface in an area percentage; and an interface between said diffusion layer and said parent material and the interface between said bond layer and said parent material being finely roughened substantially entirely over these interfaces.
Claim 2
Dependent Claim
147 words
A ceramic-sprayed member having a ceramic-sprayed layer on the surface of a parent material of an aluminum alloy with an intermediate sprayed bond layer which is made of an alloy having a coefficient of thermal expansion intermediate between those of the aluminum alloy of the parent material and the ceramic of the ceramic-sprayed layer, to provide excellent adherency of the parent material surface to the ceramic; the improvement comprising a diffusion layer in which the components of said bond layer and said parent material are diffused into each other, said diffusion layer being formed in an interface between said bond layer and said parent material and occupying 20 to 50% of said interface in an area percentage; and an interface between said diffusion layer and said parent material and the interface between said bond layer and said parent material being finely roughened substantially entirely over these interfaces.
Claim 3
Dependent Claim
20 words
A ceramic-sprayed member according to claim 1, wherein said fine roughness has a level ranging from Rz=3 to 15 microns.
Claim 4
Dependent Claim
17 words
A ceramic-sprayed member according to claim 1, wherein said bond layer is made of a nickel-based alloy.
Claim 5
Dependent Claim
22 words
A ceramic-sprayed member according to claim 1, wherein said diffusion layer is made mainly of an inter-metallic compound containing aluminum and nickel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |