Method and components for bonding a silicon carbide molded part

Details Method and components for bonding a silicon carbide molded part Method and components for bonding a silicon carbide molded part

1988-12-20

1990-10-09

Ramsey, Kenneth J.

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

228122, 228194, 228198, 22826312, 228 563, 428335, 428337, B23K 1012

Patent

active

049615297

ABSTRACT:
A layer of titanium carbosilicide Ti.sub.3 SiC.sub.2 on a silicon carbide surface polished for making a joint makes it possible to join silicon carbide bodies together in a hot pressing procedure and obtaining a joint strength comparable to the strength of the silicon carbide material. Such a layer on silicon carbide also makes possible brazed juoints with steel alloy or nickel based alloy parts. The layer may be applied directly by a powder dispersion in a volatile but viscous glycol or by sputtering or else the layer can be made in place from a powder mixture of components, especially TiC.sub.0,8 and Tisi.sub.2 (5:1) or a titanium layer of a thickness in the range of 1 to 3 .mu.m that reacts with the silicon carbide surface. When silicon carbide parts are joined together, the heating up to make the joint also serves to convert a titanium layer into titanium carbosilicide. When silicon carbide is to be joined with metal, a preliminary heating step is necessary to at first convert a powder mixture or a titanium layer on the silicon carbide surface to Ti.sub.3 SiC.sub.2. Alternatively a Ti.sub.3 SiC.sub. 2 surface layer can be formed by a sputtering process. The Ti.sub.3 SiC.sub.2 layer favors brazing of the metal part to the silicon carbide surface as treated. The heating requires reaching a temperature in the region from 1200.degree. to 1600.degree. C. for periods between a half hour to about three hours in the presence of a reducing protective gas.

REFERENCES:
patent: 3500532 (1970-03-01), Lozano et al.
patent: 4483478 (1984-11-01), Schulz
patent: 4624403 (1986-11-01), Kohno et al.
patent: 4762269 (1988-08-01), Gyarmati et al.
European Search Report-No. EP 88 12 1379.
Glas-Email-Keramo-Technik, Jun. 1983, Issue 6, pp. 205-210.
Ceramic to Metal Seals by Metallizing and/or Active Brazing, Brazen & Soldering, Autumn 1983, No. 5, pp. 22-25.
Feasibility Study of the Welding of SiC, Jun. 1985, No. 6.
Forschungsberichte der Deutschen Keramischen Gesellschaft, pp. 188-198.
"Fortschrittsberichte der Deutschen Keramischen Gesellschaft", vol. 1 (1985), Issue 2, pp. 188-198.

Affiliated with

Also associated with

Rating

Method and components for bonding a silicon carbide molded part does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and components for bonding a silicon carbide molded part , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and components for bonding a silicon carbide molded part will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-968984