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 1,800 C and 30 PSI (206.8 MPa) argon pressure for four hours produces a bulk density of 2.34 g/cc. Complex shapes can be made.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6266113
- Patent Number(s):
- 5240691
- Application Number:
- PPN: US 7-539392
- Assignee:
- Univ. of California, Oakland, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 18 Jun 1990
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; BORON; HOT PRESSING; ARGON; CONTAINERS; DENSITY; POWDERS; REFRACTORY METALS; TEMPERATURE RANGE 1000-4000 K; VERY HIGH PRESSURE; ALLOYS; ELEMENTS; FABRICATION; FLUIDS; GASES; MATERIALS WORKING; METALS; NONMETALS; PHYSICAL PROPERTIES; PRESSING; RARE GASES; SEMIMETALS; TEMPERATURE RANGE; 360601* - Other Materials- Preparation & Manufacture
Citation Formats
Hoenig, C L. High density crystalline boron prepared by hot isostatic pressing in refractory metal containers. United States: N. p., 1993.
Web.
Hoenig, C L. High density crystalline boron prepared by hot isostatic pressing in refractory metal containers. United States.
Hoenig, C L. Tue .
"High density crystalline boron prepared by hot isostatic pressing in refractory metal containers". United States.
@article{osti_6266113,
title = {High density crystalline boron prepared by hot isostatic pressing in refractory metal containers},
author = {Hoenig, C 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 1,800 C and 30 PSI (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 = {8}
}
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