Fabrication of boron articles

Patent · 31 December 1975

OSTI ID:862623

Benton, Samuel T ^[1]

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1. Knoxville, TN

This invention is directed to the fabrication of boron articles by a powder metallurgical method wherein the articles are of a density close to the theoretical density of boron and are essentially crackfree. The method comprises the steps of admixing 1 to 10 weight percent carbon powder with amorphous boron powder, cold pressing the mixture and then hot pressing the cold pressed compact into the desired article. The addition of the carbon to the mixture provides a pressing aid for inhibiting the cracking of the hot pressed article and is of a concentration less than that which would cause the articles to possess significant concentrations of boron carbide.

• Research Organization: UNION CARBIDE CORP
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3976735
• OSTI ID: 862623
• Country of Publication: United States
• Language: English

Related Subjects

/264/376/976/
10
addition
admixing
amorphous
amorphous boron
article
articles
boron
boron articles
boron carbide
boron powder
carbide
carbon
carbon powder
close
cold
cold pressed
cold pressing
compact
comprises
concentration
concentrations
crackfree
cracking
density
desired
desired article
directed
essentially
fabrication
hot
hot press
hot pressed
hot pressing
inhibiting
metallurgical
method
method comprise
method comprises
mixture
percent
percent carbon
possess
possess significant
powder
powder metallurgical
pressed
pressing
provides
significant
significant concentration
steps
theoretical
theoretical density
weight
weight percent