Metal-to-ceramic seals

Details Metal-to-ceramic seals Metal-to-ceramic seals

1977-05-19

1979-09-11

Shedd, Wayne L.

Joints and connections

Utilizing thermal characteristic, e.g., expansion or...

Members having different coefficients of expansion

403179, 403284, 403404, 285173, 285329, 2853322, 29447, F16B 702, F16C 900, F16D 100, F16G 1100

Patent

active

041673514

ABSTRACT:
For sealing metal annular elements on to a cylindrical ceramic member, e.g. a ceramic electrolyte tube in a sodium-sulphur cell without causing excessive hoop stress in the ceramic, the ceramic tube is formed with tapered inner and outer surfaces at one end, correspondingly tapered inner and outer annular elements are put over these surfaces with a soft metal, e.g. aluminium interface layer, the inner and outer annular elements having coefficients of thermal expansion respectively less than and greater than that of the ceramic, the assembly is then heated and the annular elements forced in the axial direction onto the ceramic whereby the ceramic material, on cooling, is tightly secured between the annular members.

REFERENCES:
patent: 1046085 (1912-12-01), Kraus
patent: 1066290 (1913-07-01), Kraus
patent: 1716140 (1929-06-01), Kirwer
patent: 1871371 (1932-08-01), Jackson
patent: 2169194 (1939-08-01), Geyer et al.
patent: 2482178 (1949-09-01), Harris et al.
patent: 3024300 (1962-03-01), Martin
patent: 3036674 (1962-05-01), Branin
patent: 3746374 (1973-07-01), Sedgwick et al.
Article in Metals Handbook (1948 Ed.) Published by American Society for Metals, pp. 601-605.

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