TY - JOUR
T1 - Pulsed laser heating of soot
T2 - Morphological changes
AU - Vander Wal, Randy L.
AU - Choi, Mun Y.
N1 - Funding Information:
When this work was performed, RVW was employed by Nyma Inc. through NASA Contract No. NAS3-27186. MYC, gratefully acknowledges support from The Ohio Aerospace Institute through the NASA–ASME Summer Faculty Fellow Program. Special thanks are extended to Professor Vinayak Dravid of Northwestern University for performing the HRTEM and SAED analyses and for informative discussions.
PY - 1999
Y1 - 1999
N2 - Pulsed laser heating of carbon soot is used here to achieve heating in excess of 1011 Ks-1, cooling rates on the order of 109S-1 and total integrated times at elevated temperature of ca 1 milliseconds. To resolve detailed morphological changes induced in the soot by pulsed high intensity laser light, high resolution transmission electron microscopy and selected area electron diffraction are used to examine the laser-heated soot. Partial graphitization, formation of hollow particles and the average number of graphitic planes formed within soot primary particles upon high intensity pulsed laser heating are explained via a thermal annealing mechanism. This mechanism is discussed in the context of the initial physical structure of the soot.
AB - Pulsed laser heating of carbon soot is used here to achieve heating in excess of 1011 Ks-1, cooling rates on the order of 109S-1 and total integrated times at elevated temperature of ca 1 milliseconds. To resolve detailed morphological changes induced in the soot by pulsed high intensity laser light, high resolution transmission electron microscopy and selected area electron diffraction are used to examine the laser-heated soot. Partial graphitization, formation of hollow particles and the average number of graphitic planes formed within soot primary particles upon high intensity pulsed laser heating are explained via a thermal annealing mechanism. This mechanism is discussed in the context of the initial physical structure of the soot.
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U2 - 10.1016/S0008-6223(98)00169-9
DO - 10.1016/S0008-6223(98)00169-9
M3 - Article
AN - SCOPUS:0032631735
SN - 0008-6223
VL - 37
SP - 231
EP - 239
JO - Carbon
JF - Carbon
IS - 2
ER -