Accession Number:

ADA048064

Title:

The Density, Electrical Resistivity and Hall Coefficient of Li-B Alloys.

Descriptive Note:

Final technical rept. 1 Jul 72-1 Jan 77,

Corporate Author:

NAVAL SURFACE WEAPONS CENTER WHITE OAK LAB SILVER SPRING MD

Personal Author(s):

Report Date:

1977-09-23

Pagination or Media Count:

37.0

Abstract:

The density, electrical resistivity, and Hall constant of LiB Alloys in the concentration range 0-60 at B are reported. An analysis of the measured density of the LiB reveals that in the composition range 0-40 at B most of the B is present in a Li-rich phase, probably Li5B4. The electrical resistivity at room temperature was roughly constant between 0 and 45 at B and then started to rise rapidly with increasing B. The Hall coefficient at room temperature was fairly constant from 0 to 40 at B and then started to rise. The temperature dependence and magnitude of the electrical resistivity were metallic in nature, and there was no evidence of semiconducting behavior at higher B concentrations. There was a break in the resistivity of the 40 at B sample at the melting point of Li indicating the presence of free Li, but not in the 50 to 60 at B samples. It was possible to calculate the stoichiometry and density of the LiB phase or phases present in the 40 at B sample 55.3 at Li and 1.07 gcm cc, respectively, very close to the 55.6 at Li and 1.0537 gcm cc calculated for Li5B4 predicted from a recent x-ray and neutron diffraction structure study by Wang, et. al.

Subject Categories:

  • Properties of Metals and Alloys
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE