EP0215554A1
Expired / Lapsed
EP
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Method of producing brazing metals
Assignee: NGK Insulators Ltd
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Filing: 1986-07-21
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Granted: —
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Expires: 2006-07-21
Abstract
Abstract Active brazing metals that can join ceramic members mutually or a ceramic member and a metallic member to each other with high joint strength and improved availability can be provided in various shapes such as plate or wire, even when a metal of poor ductility is used as a raw material of the brazing metals. The jointing metals are a roughened substrate and a layer thereon of a metal of higher melting point which has a smaller standard free energy of reaction with the main non-metal element of the ceramics. The thickness ratio of the layer to substrate is in the range 0.005-0.1.
Inventors
- 👤 Nobuo Tsuno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:37
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/004; C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; C04B37/02; C04B37/023; C04B37/026; F; F02; F02F; F02F7/00; F02F7/0085; F02F7/0087; C04B2235/00; C04B2235/70; C04B2235/96; C04B2235/963; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/345; C04B2237/346; C04B2237/348; C04B2237/36; C04B2237/365; C04B2237/368; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/78; C04B2237/84; F05; F05C; F05C2251/00; F05C2251/04; F05C2251/042; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12611; Y10T428/12618; Y10T428/12771; Y10T428/12806; Y10T428/12819; Y10T428/12826; Y10T428/1284; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
195 words
In a method of producing brazing metals for jointing ceramic members mutually or a ceramic member and a metallic member to each other, which composed of a metal substrate and at least one metal layer applied on at least one surface of the metal substrate, the improvement comprising, adjusting at least one surface of the substrate scheduled for applying the metal layer thereon to a surface roughness of center line average height Ra of 0.1-2.0 µm, and applying at least one metal element which has melting point higher than that of the metal substrate and which has smaller standard free energy of formation in reaction with non metal element mainly constituting the ceramic member than standard free energy of formation in reaction between metal element and the non metal element both of which are main constituents of the ceramic member, on the scheduled surface of the metal substrate in such a fashion that thickness ratio or diameter ratio of the metal layer to the metal substrate becomes in a range of 5x10 -3 - 1x10 -1 by a process selected from the group consisting of physical vapor deposition, chemical vapor deposition and metal plating process.
Claim 2
Dependent Claim
195 words
In a method of producing brazing metals for jointing ceramic members mutually or a ceramic member and a metallic member to each other, which composed of a metal substrate and at least one metal layer applied on at least one surface of the metal substrate, the improvement comprising, adjusting at least one surface of the substrate scheduled for applying the metal layer thereon to a surface roughness of center line average height Ra of 0.1-2.0 µm, and applying at least one metal element which has melting point higher than that of the metal substrate and which has smaller standard free energy of formation in reaction with non metal element mainly constituting the ceramic member than standard free energy of formation in reaction between metal element and the non metal element both of which are main constituents of the ceramic member, on the scheduled surface of the metal substrate in such a fashion that thickness ratio or diameter ratio of the metal layer to the metal substrate becomes in a range of 5x10 -3 - 1x10 -1 by a process selected from the group consisting of physical vapor deposition, chemical vapor deposition and metal plating process.
Claim 3
Dependent Claim
34 words
A method as defined in claim 1, wherein the metal substrate is a plate or wire produced by at least one method selected from the group consisting of rolling, drawing and liquid quenching process.
Claim 4
Dependent Claim
63 words
A method as defined in claim lor claim 2, wherein the ceramic member to be jointed is at least one ceramics selected from the group consisting of silicon nitride, silicon carbide and sialon and the metal layer is made of at least one metal element selected from the group consisting of Zr, Ti, B, Ta, Hf, V, Cr, La, Sc, Y and Mo.
Claim 5
Dependent Claim
56 words
A method as defined in claim 1 or claim 2, wherein the ceramic member to be jointed is at least one ceramics'selected from the group consisting of zirconia, alumina, mullite, aluminum titanate and cordierite, and the metal layer consists of at least one metal element selected from the group consisting of Be, Ce, Zr and Ti.
Claim 6
Independent Claim
32 words
A method as defined in any one of claims 1 to 4, wherein the metal layer is applied on only one surface of the metal substrate which is a plate in shape.
Claim 7
Independent Claim
31 words
A method as defined in any one of claims 1 to 5, wherein the metal layer is applied to a thickness of 0.5-100 µm on the surface of the metal substrate.
Claim 8
Independent Claim
34 words
A method as defined in any one of claims 1 to 6, wherein the physical vapor deposition process is selected from the group consisting of vacuum deposition process, sputtering process and ion plating process.
Claim 9
Independent Claim
147 words
A method of joining two ceramic members or a ceramic member and a metallic member to each other, which wherein there is used a joint-forming metal assembly which is composed of a metal substrate and at least one metal layer applied on at least one surface of the metal substrate, the or each layer being at least one metal element which has melting point higher than that of the metal substrate and which has a smaller standard free energy of formation in reaction with the main non-metal element constituting the ceramic member contacted by the layer than the standard free energy of formation in reaction between the main metal element and the main non-metal element constituting the ceramic member contacted by the layer, the thickness ratio or diameter ratio of the metal layer to the metal substrate being in the range of 5x10 - 1x10 -1 .
Claim 10
Independent Claim
147 words
A method of joining two ceramic members or a ceramic member and a metallic member to each other, which wherein there is used a joint-forming metal assembly which is composed of a metal substrate and at least one metal layer applied on at least one surface of the metal substrate, the or each layer being at least one metal element which has melting point higher than that of the metal substrate and which has a smaller standard free energy of formation in reaction with the main non-metal element constituting the ceramic member contacted by the layer than the standard free energy of formation in reaction between the main metal element and the main non-metal element constituting the ceramic member contacted by the layer, the thickness ratio or diameter ratio of the metal layer to the metal substrate being in the range of 5x10 - 1x10 -1 .
References Cited (Backward Citations)
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