Analysis of picosecond pulsed laser melted graphite [electronic resource].

Published:: Los Alamos, N.M. : Los Alamos National Laboratory, 1986.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: 10 : digital, PDF file
Additional Creators:: Los Alamos National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

A Raman microprobe and high resolution TEM have been used to analyze the resolidified region of liquid carbon generated by picosecond pulse laser radiation. From the relative intensities of the zone center Raman-allowed mode for graphite at 1582 cm/sup -1/ and the disorder-induced mode at 1360 cm/sup -1/, the average graphite crystallite size in the resolidified region is determined as a function of position. By comparison with Rutherford backscattering spectra and Raman spectra from nonosecond pulsed laser melting experiments, the disorder depth for picosecond pulsed laser melted graphite is determined as a function of irradiating energy density. Comparisons of TEM micrographs for nanosecond and picosecond pulsed laser melting experiments show that the structure of the laser disordered regions in graphite are similar and exhibit similar behavior with increasing laser pulse fluence.

Report Numbers:

E 1.99:la-ur-86-4339
E 1.99: conf-861207-45
conf-861207-45
la-ur-86-4339

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Note:

Published through SciTech Connect.
01/01/1986.
"la-ur-86-4339"
" conf-861207-45"
"DE87003755"
Materials Research Society fall meeting, Boston, MA, USA, 1 Dec 1986.
Huang, C.Y.; Dresselhaus, M.S.; Speck, J.; Malvezzi, A.M.; Braunstein, G.; Steinbeck, J.; Bloembergen, N.

Funding Information:

W-7405-ENG-36

View MARC record | catkey: 14064971