Accession Number : AD0688674

Title :   EFFECT OF ELECTRONIC STRUCTURE ON THE MECHANICAL BEHAVIOR OF THE TRANSITION METAL CARBIDES AND THEIR ALLOYS.

Descriptive Note : Final rept. 28 Apr 66-27 Apr 69,

Corporate Author : MARTIN MARIETTA CORP BALTIMORE MD RESEARCH INST FOR ADVANCED STUDIES

Personal Author(s) : Hollox,Graham E.

Report Date : APR 1969

Pagination or Media Count : 12

Abstract : The program was concerned with the mechanical behavior of TiC, VC and TiC-VC alloys, the object being to correlate the mechanical behavior of these materials with their electronic structure. The major problem restricting the utilization of the carbides in practical applications is their extreme brittleness, which is thought to be a direct consequence of the rigid and directional bonding i.e. a high Peierls stress in the lattice. The original object of the program was to characterize the mechanical behavior of TiC-VC alloys and to associate this with changes in the occupancy of electron states and hence the Peierls stress in these alloys.

Descriptors :   (*TRANSITION METALS, MOLECULAR ENERGY LEVELS), (*CARBIDES, *MOLECULAR ENERGY LEVELS), CHEMICAL BONDS, BRITTLENESS, MECHANICAL PROPERTIES, CRYSTAL STRUCTURE, TITANIUM COMPOUNDS, VANADIUM COMPOUNDS, SOLID SOLUTIONS

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE