Investigations of laser-sustained plasma and its role in laser nitriding of titanium

Abdalla Ramadan Nassar, R. Akarapu, S. M. Copley, Judith Todd Copley

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Laser-sustained plasma (LSP) and CCD imaging of reactant species were employed to investigate the role of near-surface plasma in CO 2 laser nitriding of titanium in open atmosphere. Insights were gained regarding the role of plasma processes and the role of reactive nitriding species in the nitriding process. Studies of single nitrided trails have identified the following regimes, as a function of LSP off-focal distance and beam translation speed, characterized by (1) the formation of heavily oxidized surfaces, (2) the formation of titanium nitride (TiN) nanoparticulate, (3) nitride formation in the absence of a surface-struck or LSP and (4) the formation of near-stoichiometric, oxide-free TiN surfaces with a LSP. For the first time it will be shown that the LSP can access nitriding conditions beyond those achieved with surface-struck plasma (or in the absence of plasma) to produce uniform, near-stoichiometric, titanium nitride coatings.

Original languageEnglish (US)
Article number185401
JournalJournal of Physics D: Applied Physics
Volume45
Issue number18
DOIs
StatePublished - May 9 2012

Fingerprint

nitriding
Nitriding
Titanium
titanium
Plasmas
Lasers
lasers
Titanium nitride
titanium nitrides
Carbon Monoxide
Charge coupled devices
Nitrides
Oxides
nitrides
charge coupled devices
Imaging techniques
coatings
atmospheres
Coatings
oxides

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

@article{1a69666e282045279178a6895b86aaea,
title = "Investigations of laser-sustained plasma and its role in laser nitriding of titanium",
abstract = "Laser-sustained plasma (LSP) and CCD imaging of reactant species were employed to investigate the role of near-surface plasma in CO 2 laser nitriding of titanium in open atmosphere. Insights were gained regarding the role of plasma processes and the role of reactive nitriding species in the nitriding process. Studies of single nitrided trails have identified the following regimes, as a function of LSP off-focal distance and beam translation speed, characterized by (1) the formation of heavily oxidized surfaces, (2) the formation of titanium nitride (TiN) nanoparticulate, (3) nitride formation in the absence of a surface-struck or LSP and (4) the formation of near-stoichiometric, oxide-free TiN surfaces with a LSP. For the first time it will be shown that the LSP can access nitriding conditions beyond those achieved with surface-struck plasma (or in the absence of plasma) to produce uniform, near-stoichiometric, titanium nitride coatings.",
author = "Nassar, {Abdalla Ramadan} and R. Akarapu and Copley, {S. M.} and {Todd Copley}, Judith",
year = "2012",
month = "5",
day = "9",
doi = "10.1088/0022-3727/45/18/185401",
language = "English (US)",
volume = "45",
journal = "Journal Physics D: Applied Physics",
issn = "0022-3727",
publisher = "IOP Publishing Ltd.",
number = "18",

}

Investigations of laser-sustained plasma and its role in laser nitriding of titanium. / Nassar, Abdalla Ramadan; Akarapu, R.; Copley, S. M.; Todd Copley, Judith.

In: Journal of Physics D: Applied Physics, Vol. 45, No. 18, 185401, 09.05.2012.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Investigations of laser-sustained plasma and its role in laser nitriding of titanium

AU - Nassar, Abdalla Ramadan

AU - Akarapu, R.

AU - Copley, S. M.

AU - Todd Copley, Judith

PY - 2012/5/9

Y1 - 2012/5/9

N2 - Laser-sustained plasma (LSP) and CCD imaging of reactant species were employed to investigate the role of near-surface plasma in CO 2 laser nitriding of titanium in open atmosphere. Insights were gained regarding the role of plasma processes and the role of reactive nitriding species in the nitriding process. Studies of single nitrided trails have identified the following regimes, as a function of LSP off-focal distance and beam translation speed, characterized by (1) the formation of heavily oxidized surfaces, (2) the formation of titanium nitride (TiN) nanoparticulate, (3) nitride formation in the absence of a surface-struck or LSP and (4) the formation of near-stoichiometric, oxide-free TiN surfaces with a LSP. For the first time it will be shown that the LSP can access nitriding conditions beyond those achieved with surface-struck plasma (or in the absence of plasma) to produce uniform, near-stoichiometric, titanium nitride coatings.

AB - Laser-sustained plasma (LSP) and CCD imaging of reactant species were employed to investigate the role of near-surface plasma in CO 2 laser nitriding of titanium in open atmosphere. Insights were gained regarding the role of plasma processes and the role of reactive nitriding species in the nitriding process. Studies of single nitrided trails have identified the following regimes, as a function of LSP off-focal distance and beam translation speed, characterized by (1) the formation of heavily oxidized surfaces, (2) the formation of titanium nitride (TiN) nanoparticulate, (3) nitride formation in the absence of a surface-struck or LSP and (4) the formation of near-stoichiometric, oxide-free TiN surfaces with a LSP. For the first time it will be shown that the LSP can access nitriding conditions beyond those achieved with surface-struck plasma (or in the absence of plasma) to produce uniform, near-stoichiometric, titanium nitride coatings.

UR - http://www.scopus.com/inward/record.url?scp=84860199034&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860199034&partnerID=8YFLogxK

U2 - 10.1088/0022-3727/45/18/185401

DO - 10.1088/0022-3727/45/18/185401

M3 - Article

AN - SCOPUS:84860199034

VL - 45

JO - Journal Physics D: Applied Physics

JF - Journal Physics D: Applied Physics

SN - 0022-3727

IS - 18

M1 - 185401

ER -