Abstract

Laser heating was used to study the rates and trajectories of carbon black during the earliest stages of annealing. A commercial carbon black, Regal 250 (R250 Cabot Corporation) was heated with a Q-switched Nd:YAG laser and a continuous wave CO2 laser. Structural transformations were observed with transmission electron microscopy. Micrographs were processed with in-house codes for the purpose of extracting distributions of fringe length, tortuosity (curvature), and number of lamellae per stack. Time-temperature-histories with nanosecond temporal resolution and temperature reproducibility within tens of degrees Celsius were determined by spectrally resolving the laser induced incandescence signal and applying multi-wavelength pyrometry. The Nd:YAG laser fluences include: 25, 50, 100, 200, 300, and 550 mJ/cm2. The maximum observed temperature ranged from 2400 °C to the C2 sublimation temperature of 4180 °C. The CO2 laser was used to collect a series of isothermal (2600 °C) heat treatments versus time (100 ms–20 s). Laser heated samples are compared against R250 annealed in a furnace at 2600 °C. The material transformation trajectory of Nd:YAG laser heated R250 was different than the traditional furnace heating. The traditional furnace annealing pathway is followed for CO2 laser heating as based upon equivalent end structures.

Original languageEnglish (US)
Pages (from-to)380-390
Number of pages11
JournalCarbon
Volume124
DOIs
StatePublished - Nov 1 2017

Fingerprint

Soot
Carbon black
Pulsed lasers
Annealing
Lasers
Laser heating
Furnaces
Trajectories
Pyrometry
Heating furnaces
Temperature
Continuous wave lasers
Sublimation
Heat treatment
Transmission electron microscopy
Wavelength
Industry

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

Abrahamson, Joseph P. ; Singh, Madhu ; Mathews, Jonathan P. ; Vander Wal, Randy Lee. / Pulsed laser annealing of carbon black. In: Carbon. 2017 ; Vol. 124. pp. 380-390.
@article{f1f3cc481aec4fc8be9a7aaee67b43ba,
title = "Pulsed laser annealing of carbon black",
abstract = "Laser heating was used to study the rates and trajectories of carbon black during the earliest stages of annealing. A commercial carbon black, Regal 250 (R250 Cabot Corporation) was heated with a Q-switched Nd:YAG laser and a continuous wave CO2 laser. Structural transformations were observed with transmission electron microscopy. Micrographs were processed with in-house codes for the purpose of extracting distributions of fringe length, tortuosity (curvature), and number of lamellae per stack. Time-temperature-histories with nanosecond temporal resolution and temperature reproducibility within tens of degrees Celsius were determined by spectrally resolving the laser induced incandescence signal and applying multi-wavelength pyrometry. The Nd:YAG laser fluences include: 25, 50, 100, 200, 300, and 550 mJ/cm2. The maximum observed temperature ranged from 2400 °C to the C2 sublimation temperature of 4180 °C. The CO2 laser was used to collect a series of isothermal (2600 °C) heat treatments versus time (100 ms–20 s). Laser heated samples are compared against R250 annealed in a furnace at 2600 °C. The material transformation trajectory of Nd:YAG laser heated R250 was different than the traditional furnace heating. The traditional furnace annealing pathway is followed for CO2 laser heating as based upon equivalent end structures.",
author = "Abrahamson, {Joseph P.} and Madhu Singh and Mathews, {Jonathan P.} and {Vander Wal}, {Randy Lee}",
year = "2017",
month = "11",
day = "1",
doi = "10.1016/j.carbon.2017.08.080",
language = "English (US)",
volume = "124",
pages = "380--390",
journal = "Carbon",
issn = "0008-6223",
publisher = "Elsevier Limited",

}

Pulsed laser annealing of carbon black. / Abrahamson, Joseph P.; Singh, Madhu; Mathews, Jonathan P.; Vander Wal, Randy Lee.

In: Carbon, Vol. 124, 01.11.2017, p. 380-390.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pulsed laser annealing of carbon black

AU - Abrahamson, Joseph P.

AU - Singh, Madhu

AU - Mathews, Jonathan P.

AU - Vander Wal, Randy Lee

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Laser heating was used to study the rates and trajectories of carbon black during the earliest stages of annealing. A commercial carbon black, Regal 250 (R250 Cabot Corporation) was heated with a Q-switched Nd:YAG laser and a continuous wave CO2 laser. Structural transformations were observed with transmission electron microscopy. Micrographs were processed with in-house codes for the purpose of extracting distributions of fringe length, tortuosity (curvature), and number of lamellae per stack. Time-temperature-histories with nanosecond temporal resolution and temperature reproducibility within tens of degrees Celsius were determined by spectrally resolving the laser induced incandescence signal and applying multi-wavelength pyrometry. The Nd:YAG laser fluences include: 25, 50, 100, 200, 300, and 550 mJ/cm2. The maximum observed temperature ranged from 2400 °C to the C2 sublimation temperature of 4180 °C. The CO2 laser was used to collect a series of isothermal (2600 °C) heat treatments versus time (100 ms–20 s). Laser heated samples are compared against R250 annealed in a furnace at 2600 °C. The material transformation trajectory of Nd:YAG laser heated R250 was different than the traditional furnace heating. The traditional furnace annealing pathway is followed for CO2 laser heating as based upon equivalent end structures.

AB - Laser heating was used to study the rates and trajectories of carbon black during the earliest stages of annealing. A commercial carbon black, Regal 250 (R250 Cabot Corporation) was heated with a Q-switched Nd:YAG laser and a continuous wave CO2 laser. Structural transformations were observed with transmission electron microscopy. Micrographs were processed with in-house codes for the purpose of extracting distributions of fringe length, tortuosity (curvature), and number of lamellae per stack. Time-temperature-histories with nanosecond temporal resolution and temperature reproducibility within tens of degrees Celsius were determined by spectrally resolving the laser induced incandescence signal and applying multi-wavelength pyrometry. The Nd:YAG laser fluences include: 25, 50, 100, 200, 300, and 550 mJ/cm2. The maximum observed temperature ranged from 2400 °C to the C2 sublimation temperature of 4180 °C. The CO2 laser was used to collect a series of isothermal (2600 °C) heat treatments versus time (100 ms–20 s). Laser heated samples are compared against R250 annealed in a furnace at 2600 °C. The material transformation trajectory of Nd:YAG laser heated R250 was different than the traditional furnace heating. The traditional furnace annealing pathway is followed for CO2 laser heating as based upon equivalent end structures.

UR - http://www.scopus.com/inward/record.url?scp=85028948802&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85028948802&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2017.08.080

DO - 10.1016/j.carbon.2017.08.080

M3 - Article

AN - SCOPUS:85028948802

VL - 124

SP - 380

EP - 390

JO - Carbon

JF - Carbon

SN - 0008-6223

ER -