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Title: High density crystalline boron prepared by hot isostatic pressing in refractory metal containers

Abstract

Boron powder is hot isostatically pressed in a refractory metal container to produce a solid boron monolith with a bulk density at least 2.22 g/cc and up to or greater than 2.34 g/cc. The refractory metal container is formed of tantalum, niobium, tungsten, molybdenum or alloys thereof in the form of a canister or alternatively plasma sprayed or chemical vapor deposited onto a powder compact. Hot isostatic pressing at 1800.degree. C. and 30 KSI (206.8 MPa) argon pressure for four hours produces a bulk density of 2.34 g/cc. Complex shapes can be made.

Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
868904
Patent Number(s):
5240691
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
density; crystalline; boron; prepared; hot; isostatic; pressing; refractory; metal; containers; powder; isostatically; pressed; container; produce; solid; monolith; bulk; 22; cc; 34; formed; tantalum; niobium; tungsten; molybdenum; alloys; form; canister; alternatively; plasma; sprayed; chemical; vapor; deposited; compact; 1800; degree; 30; ksi; 206; mpa; argon; pressure; hours; produces; complex; shapes; powder compact; hot isostatically; bulk density; plasma spray; vapor deposited; refractory metal; chemical vapor; hot isostatic; isostatic pressing; isostatically pressed; boron powder; plasma sprayed; metal container; argon pressure; metal containers; alternatively plasma; crystalline boron; density crystalline; complex shapes; solid boron; hours produces; complex shape; /423/264/419/

Citation Formats

Hoenig, Clarence L. High density crystalline boron prepared by hot isostatic pressing in refractory metal containers. United States: N. p., 1993. Web.
Hoenig, Clarence L. High density crystalline boron prepared by hot isostatic pressing in refractory metal containers. United States.
Hoenig, Clarence L. Fri . "High density crystalline boron prepared by hot isostatic pressing in refractory metal containers". United States. https://www.osti.gov/servlets/purl/868904.
@article{osti_868904,
title = {High density crystalline boron prepared by hot isostatic pressing in refractory metal containers},
author = {Hoenig, Clarence L.},
abstractNote = {Boron powder is hot isostatically pressed in a refractory metal container to produce a solid boron monolith with a bulk density at least 2.22 g/cc and up to or greater than 2.34 g/cc. The refractory metal container is formed of tantalum, niobium, tungsten, molybdenum or alloys thereof in the form of a canister or alternatively plasma sprayed or chemical vapor deposited onto a powder compact. Hot isostatic pressing at 1800.degree. C. and 30 KSI (206.8 MPa) argon pressure for four hours produces a bulk density of 2.34 g/cc. Complex shapes can be made.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

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