Accession Number:

AD0754478

Title:

Development of Ribbon-Reinforced Titanium Matrix Composites.

Descriptive Note:

Final rept. 16 Apr-15 Oct 72,

Corporate Author:

NATIONAL RESEARCH CORP CAMBRIDGE MASS

Personal Author(s):

• Hordon,M. J.

Report Date:

1972-11-01

Pagination or Media Count:

42.0

Abstract:

Boron carbide-ribbon reinforced titanium composites were fabricated by modifying a lamination process comprising the formation of B4C-Ti layers 0.001 inch in depth and diffusion bonding laminate assemblies at 700C and 8000-10,000 psi pressure for two hours in vacuum. Composites containing uniaxially aligned arrays of B4C ribbon elements with cross-section ratios varying from 50 to 1000 demonstrated improved transverse mechanical properties compared to equivalent fiber-reinforced products. Transverse elastic modulus and fracture stress modulus values varying from 75-100 percent of corresponding axial values were measured depending on ribbon geometry. The experimental results were in good agreement with data derived from theoretical analysis.

Descriptors:

• (*COMPOSITE MATERIALS
• *TITANIUM)
• BORON COMPOUNDS
• CARBIDES
• REINFORCING MATERIALS
• TAPES
• LAMINATES
• MECHANICAL PROPERTIES

Subject Categories:

• Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE