THE BORON-CARBON SYSTEM. Quarterly Report No. 2 for August 1, 1960 - October 31, 1960

Technical Report · Tue Nov 01 04:00:00 EST 1960

DOI:https://doi.org/10.2172/4075204· OSTI ID:4075204

Elliott, R. P.; Van Thyne, R. J.

A definitive investigation of the boron-carbon equilibrium system is being made by x-ray-diffraction, metallographic, and thermal analytical techniques. Additional boron-- carbon alloys were prepared by sirtering and arc- melting compacts prepared from boron and high-purity graphite. Metallographic examinations of these alloys are in agreement with alloys previously prepared from lampblack. X-ray investigation of sintered compacts indicates that the solubility range of boron carbide extends almost to pure boron. Boron of various purities was annealed for times up to 4 hr, but no structure other than beta - rhombehedral has been detected. Very high purity boron (10 ppm impurity) was obtained for the study of allotropy and the equilibrium relationships at very dilute carbon contents. (For preceding period see ARF-2200-3.) (auth)

• Research Organization: Illinois Inst. of Tech., Chicago. Armour Research Foundation
• NSA Number: NSA-15-006373
• OSTI ID: 4075204
• Report Number(s): ARF-2200-6
• Country of Publication: United States
• Language: English

Related Subjects

ALLOTROPY
ANNEALING
BORON CARBIDES
DIFFRACTION
ELECTRIC ARCS
GRAPHITE
IMPURITIES
LATTICES
MELTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
PHASE DIAGRAMS
PREPARATION
QUALITATIVE ANALYSIS
SINTERED MATERIALS
SINTERING
SOLUBILITY
THERMAL ANALYSIS
X RADIATION