US4699310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding alumina to metal
Assignee: Hitachi Ltd
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Filing: 1986-08-12
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Granted: 1987-10-13
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Expires: 2006-08-12
Abstract
Abstract A method of bonding alumina to a metal characterized in that an aluminum or aluminum-base alloy sheet is inserted between the alumina and the metal when they are bonded together by being heated and pressed, thereby obtaining a product which has a high reliability in strength at the joint and a high dimensional accuracy.
Inventors
- 👤 Akiomi Kohno
- 👤 Hideo Nakae
- 👤 Akihiko Yamamoto
- 👤 Hiroyuki Kawamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:28
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/121; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/402; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/60; C04B2237/72; C04B2237/76; C04B2237/765
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
A method of bonding a member made of alumina to another member made of a metal, comprising the steps of: providing a sheet containing aluminum; interposing said sheet between said alumina member and said metal member so that the surface of the sheet is in contact with respect to the surfaces of the alumina member and the metal member; and keeping said sheet and the respective surfaces of said members in contact while heating to a temperature higher than the solidus line of said aluminum containing sheet and applying pressure to interfaces defined between said sheet and said members during said heating, wherein said sheet is a three-layer material having an aluminum containing core and two skins, each skin comprising an aluminum and silicon based alloy.
Claim 2
Independent Claim
126 words
A method of bonding a member made of alumina to another member made of a metal, comprising the steps of: providing a sheet containing aluminum; interposing said sheet between said alumina member and said metal member so that the surface of the sheet is in contact with respect to the surfaces of the alumina member and the metal member; and keeping said sheet and the respective surfaces of said members in contact while heating to a temperature higher than the solidus line of said aluminum containing sheet and applying pressure to interfaces defined between said sheet and said members during said heating, wherein said sheet is a three-layer material having an aluminum containing core and two skins, each skin comprising an aluminum and silicon based alloy.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein said core is composed of pure aluminum.
Claim 4
Dependent Claim
16 words
A method according to claim 1, wherein said core is composed of an aluminum based alloy.
Claim 5
Dependent Claim
29 words
A method according to claim 1, wheren the pressure applied to the interfaces is in such degree that the core is protruded from the outer periphery of said interface.
Claim 6
Dependent Claim
25 words
A method according to claim 1, wherein said another member is made of a metal selected from the group consisting of iron, steel and aluminum.
Claim 7
Dependent Claim
18 words
A method according to claim 1, wherein said said temperature is less than or equal to 660° C.
Claim 8
Dependent Claim
20 words
A method according to claim 1, wherein said temperature is in the range of from 580° C. to 610° C.
Claim 9
Dependent Claim
21 words
A method according to claim 1, wherein said pressure is in the range of from 0.2 to 2.0 Kgf/mm 2 .
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |