Solid-state diffusion bonding of carbon-carbon composites with borides and carbides

Journal Article · Sat May 01 00:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb03752.x· OSTI ID:6211115

Dadras, P ^[1]

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1. Wright State Univ., Dayton, OH (United States)

Solid-state diffusion bonding of carbon-carbon (C-C) composites by using boride and carbide interlayers has been investigated. The interlayer materials used in this study were single-phase borides (TiB[sub 2] or ZrB[sub 2]), eutectic mixtures of borides and carbides (ZrB[sub 2] + ZrC or TiB[sub 2] + B[sub 4]C), and mixtures of TiB[sub 2] + SiC + B[sub 4]C produced insitu by chemical reactions between B[sub 4]C, Ti, and Si or between TiC, Si, and B. The double-notch shear strengths of the joints produced by solid-state reaction sintering of B[sub 4]C + Ti + Si interlayers were much higher than those of joints produced with other interlayers. The maximum strength was achieved for C-C specimens bonded at 2,000 C with a 2:1:1 mole ratio of Ti, Si, and B[sub 4]C powders. The reaction products identified in the interlayers, after joining, were TiB[sub 2], SiC, and TiC. The joint shear strength increased with the test temperature, from 8.99 MPa at room temperature to an average value of 14.51 MPa at 2,000 C.

• OSTI ID: 6211115
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 76:5; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
BONDING
COMPOSITE MATERIALS
JOINTS
SHEAR PROPERTIES
MIXTURES
SINTERING
TITANIUM BORIDES
ZIRCONIUM BORIDES
BORIDES
BORON COMPOUNDS
DISPERSIONS
ELEMENTS
FABRICATION
JOINING
MATERIALS
MECHANICAL PROPERTIES
NONMETALS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360601* - Other Materials- Preparation & Manufacture
360603 - Materials- Properties