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 : NOV 1972

Pagination or Media Count : 42

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