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

Hoenig, Clarence L

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

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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:

Hoenig, Clarence L ^[1]

Livermore, CA

Issue Date:: 1993-01-01

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)

Patent Classifications (CPCs):: C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

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C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B35/6455 - {Hot isostatic pressing}

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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/

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                    Hoenig, Clarence L. High density crystalline boron prepared by hot isostatic pressing in refractory metal containers.  United States: N. p., 1993. 
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                    Hoenig, Clarence L. High density crystalline boron prepared by hot isostatic pressing in refractory metal containers.  United States.

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                    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.

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@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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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 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{degrees}C and 30 KSI (206.8 MPa) argon pressure for four hour produces a bulk density of 2.34 g/cc. Complex shapes can be made.
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