The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 1983
Filed:
Nov. 16, 1981
Applicant:
Inventor:
George K Layden, Wethersfield, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
156 89 ; 156D / ; 264 65 ; 264332 ; 423344 ; 428446 ;
Abstract
Compositions are disclosed for securing Si.sub.3 N.sub.4 parts together, these compositions being in the .beta.'-Y.sub.2 Si.sub.2 O.sub.7 --Y.sub.3 Al.sub.5 O.sub.12 tetrahedron, e.g. compositions in mole % comprising (1) 15% Si.sub.3 N.sub.4, 79.1% Y.sub.2 Si.sub.2 O.sub.7 and 6.9% Y.sub.3 Al.sub.5 O.sub.12 or (2) 25% Si.sub.2 AlON.sub.3 and 75% Y.sub.3 Al.sub.5 O.sub.12 Y. A method of securing Si.sub.3 N.sub.4 parts together comprises placing the composition between the parts to be bonded and heating to brazing temperature (about 1600.degree. C.) in nitrogen.