Laser modification of the materials surface layer – a review paper

Abstract

Abstract. The state of laser processing in surface materials modification in Poland is reported, based on own experience, coworkers and coauthors results, as well the literature review. The curriculum concerning historical development of lasers and laser technology in Poland, laser-matter interaction, as well basis of different laser techniques applied in materials surface engineering (solid state hardening, melting, alloying, cladding, ablation, shot peening, cleaning and texturing) are reviewed, and compared with results of coauthors, as well with a wide range of Polish authors papers. Finally, it is concluded that overall state of research on laser application in surface engineering in Poland is well developed and still growing industrial application is observed.

Microstructural Analysis of Sintered Gradient Materials Based on Distaloy SE Powder

“…In recent years, new technologies have emerged for the application and shaping of surface layers to mention, among others, diffusion and laser techniques, casting, infiltration and welding [1,2]. An important group of materials includes steels which have the surface layer modified by ceramic materials produced with the use of laser energy [3,4]. A separate group is composed of functional materials used for all kinds of medical implants.…”

Micromachining And Pattering In Micro/Nano Scale On Macroscopic Areas

“…The surface engineering involves the processes of creating top surface layers and coatings as well as their modification (changes in surface topography and its micro-structuring), investigation of the accompanying phenomena as well as obtaining the final, exploitable results [11].…”

Deposition Of Oxide And Intermetallic Thin Films By Pulsed Laser (PLD) And Electron Beam (PED) Methods

“…As shown in our previous paper [7] in case of the PLD technique, the target material is placed inside a chamber with a controlled atmosphere (vacuum or reactive gas) where is irradiated, through an optical window by a high fluency, focused, laser beam. Usually, a vacuum chamber is equipped with a rotating target support and a substrate holder, which can be resistively heated up to 900°C.…”

“…In general, the thin film deposition process, involves evaporation of material (being in the form of a solid target) by pulsed laser beam of very short duration (from micro-to nano-and even femtoseconds) focused on the material surface (target) and of very high fluence and then vapor deposition and thin film growth on the substrate. The dominant mechanisms involved in the formation of a hot plasma from the irradiated surface were found to depend sensitively on laser parameters such as the energy density (fluence), pulse duration, wavelength, polarization, laser repetition rate, as well as the properties of irradiated material [4][5][6][7][8]. The laser's temporal pulse length can have a significant effect on the dynamics of the ablation process.…”