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Laser-assisted generation of self-assembled microstructures on stainless steel

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Laser-assisted generation of self-assembled microstructures on stainless steel. / Lloyd, Robert; Abdolvand, Amin; Schmidt, Marc; Crouse, Philip; Whitehead, David; Liu, Zhu; Li, Lin.

In: Applied Physics A: Materials Science & Processing, Vol. 93, No. 1, 2008, p. 117-122.

Research output: Contribution to journalArticle

Harvard

Lloyd, R, Abdolvand, A, Schmidt, M, Crouse, P, Whitehead, D, Liu, Z & Li, L 2008, 'Laser-assisted generation of self-assembled microstructures on stainless steel' Applied Physics A: Materials Science & Processing, vol 93, no. 1, pp. 117-122., 10.1007/s00339-008-4646-4

APA

Lloyd, R., Abdolvand, A., Schmidt, M., Crouse, P., Whitehead, D., Liu, Z., & Li, L. (2008). Laser-assisted generation of self-assembled microstructures on stainless steel. Applied Physics A: Materials Science & Processing, 93(1), 117-122. 10.1007/s00339-008-4646-4

Vancouver

Lloyd R, Abdolvand A, Schmidt M, Crouse P, Whitehead D, Liu Z et al. Laser-assisted generation of self-assembled microstructures on stainless steel. Applied Physics A: Materials Science & Processing. 2008;93(1):117-122. Available from: 10.1007/s00339-008-4646-4

Author

Lloyd, Robert; Abdolvand, Amin; Schmidt, Marc; Crouse, Philip; Whitehead, David; Liu, Zhu; Li, Lin / Laser-assisted generation of self-assembled microstructures on stainless steel.

In: Applied Physics A: Materials Science & Processing, Vol. 93, No. 1, 2008, p. 117-122.

Research output: Contribution to journalArticle

Bibtex - Download

@article{d051dd7637274237bb70c14ecbbf353d,
title = "Laser-assisted generation of self-assembled microstructures on stainless steel",
author = "Robert Lloyd and Amin Abdolvand and Marc Schmidt and Philip Crouse and David Whitehead and Zhu Liu and Lin Li",
year = "2008",
doi = "10.1007/s00339-008-4646-4",
volume = "93",
number = "1",
pages = "117--122",
journal = "Applied Physics A: Materials Science & Processing",
issn = "0947-8396",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Laser-assisted generation of self-assembled microstructures on stainless steel

A1 - Lloyd,Robert

A1 - Abdolvand,Amin

A1 - Schmidt,Marc

A1 - Crouse,Philip

A1 - Whitehead,David

A1 - Liu,Zhu

A1 - Li,Lin

AU - Lloyd,Robert

AU - Abdolvand,Amin

AU - Schmidt,Marc

AU - Crouse,Philip

AU - Whitehead,David

AU - Liu,Zhu

AU - Li,Lin

PY - 2008

Y1 - 2008

N2 - <p>Utilising a Nd:YVO4 laser (wavelength of 532 nm, pulse duration of 8 ns, repetition rate of 30 kHz) and a Nd: YAG laser ( wavelength of 1064 nm, pulse duration of 7 ns, repetition rate of 25 kHz), it was found that during the pulsed laser ablation of metal targets, such as stainless steel, periodic nodular microstructures (microcones) with average periods ranging from similar to 30 to similar to 50 mu m were formed. This period depends on the number of accumulated laser pulses and is independent of the laser wavelength. It was found that the formation of microcones could occur after as little as 1500 pulses/spot ( a lower number than previously reported) are fired onto a target surface location at laser fluence of similar to 12 J/cm(2), intensity of similar to 1.5 GW/cm(2). The initial feedback mechanism required for the formation of structures is attributed to the hydrodynamic instabilities of the melt. In addition to this, it has been shown that the structures grow along the optical axis of the incoming laser radiation. We demonstrate that highly regular structures can be produced at various angles, something not satisfactorily presented on metallic surfaces previously. The affecting factors such as incident angle of the laser beam and the structures that can be formed when varying the manner in which the laser beam is scanned over the target surface have also been investigated.</p>

AB - <p>Utilising a Nd:YVO4 laser (wavelength of 532 nm, pulse duration of 8 ns, repetition rate of 30 kHz) and a Nd: YAG laser ( wavelength of 1064 nm, pulse duration of 7 ns, repetition rate of 25 kHz), it was found that during the pulsed laser ablation of metal targets, such as stainless steel, periodic nodular microstructures (microcones) with average periods ranging from similar to 30 to similar to 50 mu m were formed. This period depends on the number of accumulated laser pulses and is independent of the laser wavelength. It was found that the formation of microcones could occur after as little as 1500 pulses/spot ( a lower number than previously reported) are fired onto a target surface location at laser fluence of similar to 12 J/cm(2), intensity of similar to 1.5 GW/cm(2). The initial feedback mechanism required for the formation of structures is attributed to the hydrodynamic instabilities of the melt. In addition to this, it has been shown that the structures grow along the optical axis of the incoming laser radiation. We demonstrate that highly regular structures can be produced at various angles, something not satisfactorily presented on metallic surfaces previously. The affecting factors such as incident angle of the laser beam and the structures that can be formed when varying the manner in which the laser beam is scanned over the target surface have also been investigated.</p>

U2 - 10.1007/s00339-008-4646-4

DO - 10.1007/s00339-008-4646-4

M1 - Article

JO - Applied Physics A: Materials Science & Processing

JF - Applied Physics A: Materials Science & Processing

SN - 0947-8396

IS - 1

VL - 93

SP - 117

EP - 122

ER -

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