Clad brazing filler for bonding ceramic to metal, glass, or other ceramic and composites using such filler

Patent 4624897 Issued on November 25, 1986. Estimated Expiration Date:

June 8, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3700420

Plated foil for liquid interface bonding of titanium
Patent #: 4029479
Issued on: 06/14/1977
Inventor: Parker

4350743

Layered active brazing material and method for producing it Patent #: 4448853
Issued on: 05/15/1984
Inventor: Fischer , et al.

Inventor

Ito, Masaya

Assignee

NGK Spark Plug Co., Ltd.

Application

No. 06/618784 filed on 06/08/1984

US Classes:

428/432, Next to metal or compound thereof428/433, Alloy or free metal428/434, Noble metal containing428/469, Next to metal salt or oxide428/660, Refractory (Group IVB, VB, or VIB) metal-base component428/668, Group VIII or IB metal-base component428/671, Cu-base component alternative to Ag-, Au-, or Ni-base component428/673, Ag-base component428/674Cu-base component

Examiners

Primary: Lieberman, Allan M.

Attorney, Agent or Firm

Sughrue, Mion, Zinn, Macpeak and Seas

International Classes

B23K 35/00 (20060101)
B23K 35/30 (20060101)
C04B 37/02 (20060101)
C04B 37/00 (20060101)
C04B 37/04 (20060101)

Foreign Application Priority Data

1983-06-17 JP

Abstract

A clad brazing filler for use in bonding a ceramic to a metal, glass or another ceramic having a substantially different thermal expansion coefficient, and composites using such a filler. According to one aspect of the invention, a brazing filler of a clad type is provided which is composed of a titanium layer adjacent a silver, copper or silver-copper alloy layer, or a combination of silver and copper layers, with the titanium content being in a range of 3 to 80% of the total weight of the layers of the assembly. In accordance with another aspect of the invention, a brazing filler of the clad type is provided which combines the layer arrangement of the first aspect with either a layer of a metal having a low thermal expansion coefficient, a layer of a metal having a low Young's modulus, for a combination layer of both, arranged in any order.