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Method of producing metal to glass, metal to metal or metal to ceramic connections

A metal and glass technology, applied in the direction of final product manufacturing, sustainable manufacturing/processing, fuel cell components, etc.

Inactive Publication Date: 2008-01-09
DANMARKS TEKNISKE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite promising results reported, none of them can fully satisfy the requirements of mechanical properties such as viscosity and matching of thermal expansion and chemical compatibility such as wetting and adhesion.

Method used

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  • Method of producing metal to glass, metal to metal or metal to ceramic connections
  • Method of producing metal to glass, metal to metal or metal to ceramic connections

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Crofer 22APU(c) coated with 15 μm thick No 3 glass / MgO / CO by screen printing 3 o 4 (4wt% MgO, 0.5wt% Co 3 o 4 ) glassy tie layer ((b) in Figure 2A). No3 glass was prepared and combined with 72wt% metal powder (Fe Cr alloy, 90 μm < d < 120 μm) to obtain a composite sealing part (a). The metal and composite seals were bonded together during heating to 950°C at 400 kPa for 4 hours, then cooled to 750°C at which temperature the joint was aged for 500 hours, then thermally cycled twice to room temperature.

Embodiment 2

[0057] Sandvik 0YC44(c) was coated with nominally 0.1 μm thick metallic nickel (d) and a 45 μm thick No1 glass / MgO (2 wt% MgO, d<1.1 μm) glassy tie layer ( See (b)) in Figure 2B. No1 glass was prepared and combined with 55wt% crude MgO to obtain a composite sealing part (a). The metal and composite seals are bonded together during heating to 950°C at 400kPa for 4 hours, then cooled to 750°C (under an atmosphere of argon / hydrogen mixture), at which temperature the joint is aged for 500 hours, and then reheated twice to room temperature.

Embodiment 3

[0059] Sandvik 0YC44 (c) was coated with nominally 0.1 μm thick Mn metal (d) and preheated in argon (pO 2 -20 atmospheric pressure) to alloy the coating into the surface, and after cooling to room temperature, 15 μm thick No3 glass / MgO / NaO (10wt% MgO, d2 O, d < 2 μm) glassy connection layer (b), see FIG. 2B . No3 glass was prepared and combined with 79wt% metal powder (SS316) to obtain a composite sealing part (a). The metal and composite seals are bonded together during heating to 950°C at 400kPa for 4 hours, then cooled to 750°C (under an argon / hydrogen mixture atmosphere), at which temperature the joint is aged for 500 hours, and then reheated twice to room temperature.

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Abstract

A method of manufacturing metal to glass, metal to metal and metal to ceramic connections to be used in SOFC applications, said connections being produced as a mixture of a base glass powder and a metal oxide powder. As a result, the inherent properties of the glass used in the composite seals may be altered locally in the metal-coating interface by adding e.g. MgO in order to control the viscosity and wetting, and at the same time maintain the bulk properties such as high coefficient of thermal expansion of the basic glass towards the seal components.

Description

technical field [0001] The invention relates to a method of making metal-glass, metal-metal or metal-ceramic connections. The connection can be used, for example, in solid oxide fuel cell (SOFC) applications. Background technique [0002] Typically, planar SOFCs consist of stacked cells, each containing an electrolyte sandwiched between two electrodes. The electrodes of each cell are in contact with an interconnect layer that connects the cells in series. Hermetic sealing is critical to fuel cell performance, durability and safe operation. [0003] Glasses are suitable as sealing materials for SOFCs due to the ability to adjust their physical and chemical properties in a wide range. Different glass and glass-ceramic compositions have been investigated in the group of alkali silicate glass, alkali aluminosilicate glass, alkaline earth silicate glass, alkaline earth aluminoborosilicate glass, phosphate glass and borosilicate glass Were studied. However, despite promising ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02C04B37/02C03C27/04B21D39/00
CPCC04B2237/40C04B2237/10B32B2311/00C04B37/025H01M8/0282C03C29/00C03C27/042Y02E60/50Y02E60/525C03C8/24H01M2008/1293C04B2237/343Y02P70/50H01M8/02C03C27/04C04B37/02
Inventor 卡尔斯滕·阿格斯泰·尼尔森梅特·索尔旺彼得·霍尔沃·拉尔森
Owner DANMARKS TEKNISKE UNIV
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