Optimization of radiation absorption in metallic particles

Taiqing Qiu; Jon P. Longtin; Chang Lin Tin

Optimization of radiation absorption in metallic particles

Taiqing Qiu
, Jon P. Longtin
, Chang Lin Tin

Mechanical Engineering

University of California at Berkeley

Research output: Contribution to journal › Conference article › peer-review

Abstract

Thermal radiation absorption in metallic particles is an important phenomenon in many contemporary laser-processing techniques, including laser cladding og coating materials and laser cleaning of particulate contaminations. In this work, the Drude free-electron theory and electromagnetic wave theory are utilized to characterize the internal absorption of CO₂ laser radiation in aluminum, chromium and nickel particles, and to explore ways of optimizing radiation absorption. The results show that large particles absorb radiation inefficiently since radiation absorption occurs only in a very narrow region of the front particle surface. On the other hand, micron and submicron particles can absorb radiation very efficiently, due to the strong diffraction effect at the particle surface.

Original language	English
Pages (from-to)	91-98
Number of pages	8
Journal	American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume	276
State	Published - 1994
Event	Proceedings of the 6th AIAA/ASME Thermophysics and Heat Transfer Conference. Part 1 (of 10) - Colorado Springs, CO, USA Duration: Jun 20 1994 → Jun 23 1994

Cite this

@article{a0bf2ac1857d4978bed3898ff2a1ba78,

title = "Optimization of radiation absorption in metallic particles",

abstract = "Thermal radiation absorption in metallic particles is an important phenomenon in many contemporary laser-processing techniques, including laser cladding og coating materials and laser cleaning of particulate contaminations. In this work, the Drude free-electron theory and electromagnetic wave theory are utilized to characterize the internal absorption of CO2 laser radiation in aluminum, chromium and nickel particles, and to explore ways of optimizing radiation absorption. The results show that large particles absorb radiation inefficiently since radiation absorption occurs only in a very narrow region of the front particle surface. On the other hand, micron and submicron particles can absorb radiation very efficiently, due to the strong diffraction effect at the particle surface.",

author = "Taiqing Qiu and Longtin, \{Jon P.\} and Tin, \{Chang Lin\}",

year = "1994",

language = "English",

volume = "276",

pages = "91--98",

journal = "American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD",

issn = "0272-5673",

note = "Proceedings of the 6th AIAA/ASME Thermophysics and Heat Transfer Conference. Part 1 (of 10) ; Conference date: 20-06-1994 Through 23-06-1994",

}

TY - JOUR

T1 - Optimization of radiation absorption in metallic particles

AU - Qiu, Taiqing

AU - Longtin, Jon P.

AU - Tin, Chang Lin

PY - 1994

Y1 - 1994

N2 - Thermal radiation absorption in metallic particles is an important phenomenon in many contemporary laser-processing techniques, including laser cladding og coating materials and laser cleaning of particulate contaminations. In this work, the Drude free-electron theory and electromagnetic wave theory are utilized to characterize the internal absorption of CO2 laser radiation in aluminum, chromium and nickel particles, and to explore ways of optimizing radiation absorption. The results show that large particles absorb radiation inefficiently since radiation absorption occurs only in a very narrow region of the front particle surface. On the other hand, micron and submicron particles can absorb radiation very efficiently, due to the strong diffraction effect at the particle surface.

AB - Thermal radiation absorption in metallic particles is an important phenomenon in many contemporary laser-processing techniques, including laser cladding og coating materials and laser cleaning of particulate contaminations. In this work, the Drude free-electron theory and electromagnetic wave theory are utilized to characterize the internal absorption of CO2 laser radiation in aluminum, chromium and nickel particles, and to explore ways of optimizing radiation absorption. The results show that large particles absorb radiation inefficiently since radiation absorption occurs only in a very narrow region of the front particle surface. On the other hand, micron and submicron particles can absorb radiation very efficiently, due to the strong diffraction effect at the particle surface.

UR - https://www.scopus.com/pages/publications/0028727488

M3 - Conference article

AN - SCOPUS:0028727488

SN - 0272-5673

VL - 276

SP - 91

EP - 98

JO - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

JF - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

T2 - Proceedings of the 6th AIAA/ASME Thermophysics and Heat Transfer Conference. Part 1 (of 10)

Y2 - 20 June 1994 through 23 June 1994

ER -

Optimization of radiation absorption in metallic particles

Abstract

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