Plasma-assisted conversion of solid hydrocarbon to diamond

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870619

Valone, Steven M ^[1]; Pattillo, Stevan G ^[2]; Trkula, Mitchell ^[2]; Coates, Don M ^[1]; Shah, S Ismat ^[3]

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1. Santa Fe, NM
2. Los Alamos, NM
3. Wilmington, DE

A process of preparing diamond, e.g., diamond fiber, by subjecting a hydrocarbon material, e.g., a hydrocarbon fiber, to a plasma treatment in a gaseous feedstream for a sufficient period of time to form diamond, e.g., a diamond fiber is disclosed. The method generally further involves pretreating the hydrocarbon material prior to treatment with the plasma by heating within an oxygen-containing atmosphere at temperatures sufficient to increase crosslinking within said hydrocarbon material, but at temperatures insufficient to melt or decompose said hydrocarbon material, followed by heating at temperatures sufficient to promote outgassing of said crosslinked hydrocarbon material, but at temperatures insufficient to convert said hydrocarbon material to carbon.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: Regents of University of California Office of Technology Transfer (Alameda, CA)
• Patent Number(s): US 5560897
• OSTI ID: 870619
• Country of Publication: United States
• Language: English

Related Subjects

plasma-assisted
conversion
solid
hydrocarbon
diamond
process
preparing
fiber
subjecting
material
plasma
treatment
gaseous
feedstream
sufficient
period
time
form
disclosed
method
involves
pretreating
prior
heating
oxygen-containing
atmosphere
temperatures
increase
crosslinking
insufficient
melt
decompose
followed
promote
outgassing
crosslinked
convert
carbon
material prior
hydrocarbon material
carbon fiber
carbon material
gaseous feed
sufficient period
plasma treatment
oxygen-containing atmosphere
solid hydrocarbon
temperatures sufficient
diamond fiber
containing atmosphere
preparing diamond
/423/