Joining of carbon-carbon composites using boron and titanium disilicide interlayers

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1997.tb02800.x· OSTI ID:455163

Dadras, P; Mehrotra, G M ^[1]; Ngai, T T ^[2]

---

1. Wright State Univ., Dayton, OH (United States). Dept. of Mechanical and Materials Engineering
2. Lockheed Missiles and Space Co., Sunnyvale, CA (United States)

Carbon-carbon (C-C) composites are attractive as candidate structural materials for high-temperature aerospace applications. The feasibility of joining of 3-D carbon-carbon (C-C) composites by using B and TiSi{sup 2} interlayers has been investigated. The optimum temperature for joining with a B interlayer was determined to be about 1,995 C and that for joining with a TiSi{sub 2} interlayer was about 1,490 C. The shear strengths of the joints made at these optimum temperatures were found to increase with the shear testing temperature up to a point, followed by a decrease at higher temperatures. For C-C specimens bonded at 1,995 C with a B interlayer, the maximum joint shear strength (average value 18.35 MPa) was observed at the test temperature of 1,660 C. The shear strength of joints produced with a TiSi{sub 2} interlayer showed a maximum at the test temperature of 1164 C, with an average value of 34.41 MPa. The B interlayers reacted with C-C composite pieces during joining, and the product of reaction was identified as B{sub 4}C. In specimens joined with TiSi{sub 2} interlayers, the reaction between TiSi{sub 2} and C did not go to completion, and the bond interlayer contained TiC, SiC, and TiSi{sub 2}.

• Sponsoring Organization: USDOE
• OSTI ID: 455163
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 80; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
BORON
CARBON
CHEMICAL REACTIONS
COMPOSITE MATERIALS
EXPERIMENTAL DATA
INTERFACES
JOINING
MICROSTRUCTURE
SHEAR PROPERTIES
TITANIUM SILICIDES