Bonding and fracture of titanium-containing braze alloys to alumina

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6870475

Cassidy, R T; Pence, R E; Moddeman, W E; Buonaquisti, A D

Titanium-containing braze alloys were used to join both 94 and 99+% Al/sub 2/O/sub 3/ compositions. Resulting tensile strengths of 11 to 16 KSI compared favorably with conventional Mo-Mn metallizing. Extensive optical, scanning, WDX, and Auger analyses reveal the migration of titanium to the ceramic surface during brazing where it reacts with the copper of the braze alloy and forms an intermetallic of the approximate composition Cu/sub x/Ti (1.2 < x < 1.6). The presence of oxidized titanium, probably TiO/sub 2/, was also detected near the interface. Examination of fractured samples indicates that fracture is occurring in the CaO.SiO/sub 2/ glassy phase of the ceramic very near the braze layer.

• Research Organization: Monsanto Research Corp., Miamisburg, OH (USA). Mound; JEOL, USA, Inc., Peabody, MA
• DOE Contract Number: AC04-76DP00053
• OSTI ID: 6870475
• Report Number(s): MLM-3431(OP); CONF-870422-1; ON: DE87009195
• Resource Relation: Conference: 89. annual meeting of the American Ceramic Society, Pittsburgh, PA, USA, 26 Apr 1987; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BRAZING
BRAZING ALLOYS
PERFORMANCE
BRAZED JOINTS
COPPER ALLOYS
FRACTURES
INTERFACES
SEGREGATION
SILVER ALLOYS
TITANIUM ALLOYS
ALLOYS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
FABRICATION
FAILURES
JOINING
JOINTS
OXIDES
OXYGEN COMPOUNDS
WELDED JOINTS
WELDING
360201* - Ceramics
Cermets
&amp; Refractories- Preparation &amp; Fabrication