A typical laser nitriding process can be described as follows: hardness values close to 1500 HV and dendrites near the melted-unmelted region laser-induced plasma occurred due to gas A Comparative Study of Laser Induced Plasma Micro low melting point polymers via the process of laser induced plasma micro -machining (LIPMM) . LIPMM [14 ] is a micro -texturing process recently proposed by the authors of this work as an alternative to direct laser ablation. In LIPMM a l aser beam is tightly focused inside a dielectric media, usually distilled water or kerosene, to
Nov 01, 2019 · Abstract. Laser induced plasma micromachining (LIPMM) process is an effective approach to create micro-features with high aspect ratio and reduced heat affected zone. However, the throughput of this process is limited by the low scanning speed and low frequency used in the conventional underwater condition due to the disturbance of water layer, generation of bubbles and Effect of process parameters on the formation of laser Apr 01, 2015 · Especially in the field of laser remote processing, the attenuation of laser radiation by nanoparticles can influence the process stability and reduce the processing quality. The presented work is focused on the particle formation at a height of 10 mm above the material surface during the laser welding of stainless steel with a fiber laser. Experimental Study of Laser-Induced Brass and Copper This paper presents time-resolved and space-integrated laser-induced breakdown spectroscopic (LIBS) analysis of copper and brass plasma. It was observed that copper emission is very strong during the first hundred nanoseconds of the plasma, but then some lines (e.g., at 327.4 nm) decrease in intensity, while others (e.g., 521.8 nm) slightly increase.
Dec 14, 2019 · The surface hardness values of the studied samples were spectroscopically determined via the intensity ratios of the ionic-to-atomic spectral lines of iron in the rock samples. Besides, the laser-induced plasma parameters, namely the plasma temperature and the electron density, were calculated from the obtained spectral data. High-energy hundred-picosecond fiber-solid hybrid laser Feb 19, 2020 · The experimental results show that the fiber-solid hybrid picosecond regenerative amplifier is a simple and effective method to obtain high-stability and high-energy laser source. This system is likely to provide a better radiation source for studying thermal damage and plasma damage of the laser-induced photodetector. Integration effect of O2plasma to an excimerlaser To prevent photocorrosion of a Cu 2 O photocathode, composition of a TiO 2 layer onto the Cu 2 O is one of the most effective solutions. For crystallization of the TiO 2 layer alone without heatdamage to the underlying Cu 2 O layer, which is easy to oxidize to CuO, we developed the integration process of O 2 plasma and an excimerlaser irradiation, that a metalorganic precursor film
To prevent photocorrosion of a Cu 2 O photocathode, composition of a TiO 2 layer onto the Cu 2 O is one of the most effective solutions. For crystallization of the TiO 2 layer alone without heatdamage to the underlying Cu 2 O layer, which is easy to oxidize to CuO, we developed the integration process of O 2 plasma and an excimerlaser irradiation, that a metalorganic precursor film Laser induced arc dynamics destabilization in laser-arc Dec 05, 2019 · The laser can also improve weld quality [ 2, 7, 8 ]. Hence, it is generally recognized that the arc plasma can be stabilized by laser in the welding [ 9 11 ]. However, many studies demonstrated that in laser-TIG hybrid welding (LTHW), the arc is no longer in a Laser induced structural and microstructural Sep 28, 2001 · Laser induced structural and microstructural transformations of plasma sprayed Al 2 O 3 coatings. During the process of plasma spraying, alumina powder injected into the high temperature plasma gets melted, entrained in the gas stream, gets accelerated and impinges on the substrate to form the coating. The hardness value of the later
Schematic diagram of the fabrication process flow for the memory device. a-b) Synthesis of LIG by using laser scribing process. c) Formation of a LIG-PDMS composite. d) Detachment of the LIG-PDMS composite from a PI substrate. e) Free-standing LIG-PDMS composite. f) Memory device based on a LIG-PDMS composite by O 2 plasma treatment and Al Laser-induced structure transition of diamond-like carbon We report on the structural evolution of diamond-like carbon (DLC) films by the nanosecond pulsed laser annealing process. DLC film is coated on cemented carbide (WC-Co) by cathodic arc ion plating, which is then annealed by ArF laser (193 nm, 20 ns) at different laser fluences (0.91.7 J/cm 2).Upon laser annealing, Raman spectra divulge higher sp 3 fractions accompanied by a blue shift in Materials Free Full-Text Microstructural Evolution and Wang et al. reported that a laser-induced coating with the addition of Mo 6 Ni 6 C generated alloys with significantly higher hardness than that of the substrate. From the viewpoint of surface engineering, the NiSi intermetallics exhibited outstanding tribological properties due to their high hardness and strong atomic bonding [ 20 ].
Figure 9.22 shows that the hardness of the outermost nitrided layer (00.05 mm) is higher than that of the WC and Co\W laser alloyed layers, while the subsurface hardness (0.050.20 mm) of the nitrided layer decreases quickly and is lower than that of the two laser alloyed layers. This is because the concentration of nitrogen in the outermost layer is higher than that of the subsurface, while elements in the surface of the laser The New Technologies Developed from Laser Shock Laser shock processing (LSP) is an advanced material surface hardening technology that can significantly improve mechanical properties and extend service life by using the stress effect generated by laser-induced plasma shock waves, which has been increasingly applied in the processing fields of metallic materials and alloys. With the rapidly development of modern industry, many new The challenges of laser cutting:Overcoming some common Adding a water quenching system to the laser cutting nozzle can reduce heat-induced stress. Misting the part will lower the overall temperature, but will not affect the recast layer. This process works well when cutting tubes with diameters less than 1/4 inch and usually prevents slag
Jan 22, 2020 · The application of an alternative laser-induced breakdown spectroscopy (LIBS) method based on transversely excited atmospheric (TEA) CO2 laser was investigated for the first time for estimating the hardness of metallic materials. The human eye-safe (TEA) CO2 laser, operating at 10.6 µm, was used for plasma generation. The LIBS spectra were recorded by employing a cost-effective