Laser heating of metals
著者
書誌事項
Laser heating of metals
（The Adam Hilger series on optics and optoelectronics）
Adam Hilger, 1990
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注記
Bibliography: p. 221-231
Includes index
内容説明・目次
内容説明
In order to ensure efficient use of lasers, and for any large-scale implementation, a thorough knowledge of the fundamental laws governing the interaction of radiation with matter is required. Laser Heating of Metals provides a systematic and comprehensive presentation of the fundamental principles underlying the physical and chemical mechanisms governing the interaction of laser radiation with solid targets, and in particular metals in gaseous environments, for a wide range of beam parameters. The authors have been active in the field of interactions between lasers and materials for many years, and this book summarises the results of their work, in particular concerning the action of CO2 lasers on metals. These results are then discussed at some length. Laser Heating of Materials will be of interest to scientists at all levels with an interest in the interaction of radiation with condensed matter, and in particular to those involved in laser cutting and welding etc, and metal-working.
目次
Optical properties of metals: Metal absorptivity at room temperature. Real metallic surfaces. Temperature variation of the absorptivity of metals. Basic regimes of the heating of metal targets by laser irradiation: The laser heating source. The heat conduction equation. Semi-infinite metal target. Consideration of the temperature variation of the thermophysical and optical properties of metals. Laser source in motion. Metal blades (samples of finite thickness). Metal layer on metal base. Superficial melting and metal heating beyond the melting point. Light-induced thermoelastic deformations of metal surfaces: The main phases of the process. Stability criteria of the surface profile of metallic samples (cw laser irradiation regime). Light stability of metal mirrors exposed to pulsed irradiation in a vacuum: Measurement methods. Preparation of the mirror surface. Thermoelastic damage to the surface. Surface melting of metals. Metal vaporisation. Size effects. Surface periodical structures. Non-resonant periodic structures. Resonant periodical structures. Mechanisms of RPS formation. The absorptivity of a rippled surface. Effects caused by RPS on metal surfaces. Laser-induced oxidation and burning of metals. Mechanisms resulting in the increase of the thermal effect of CO^O2-laser radiation upon metals in an oxidising medium. Fundamental equations. Experimental methods of investigation. The low temperature phase in the oxidation of metals and alloys. Activation of the oxidation reaction. Radiation interference in the metal-oxide system. Ignition and burning of metals. Optical effects and diagnosis of thermochemical interaction processes: Optical effects in non-equilibrium systems. Dynamic laser methods used to determine oxide optical and thermodiffusive constants. The choice of optical irradiation conditions: Sample heating in chemically-inert gases. Ways to improve the efficiency of thermochemical metal processing. References. Index.
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