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Journal articles on the topic 'Size layer'

Author: Grafiati

Published: 9 September 2021

Last updated: 29 July 2025

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1

Ekgardt, V. F., D. A. Dorofeev, T. B. Shaimov, and R. V. Deev. "About the optic disc size." Kazan medical journal 94, no. 6 (2013): 850–53. http://dx.doi.org/10.17816/kmj1804.

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Aim. To compare the dependence of retinal nerve fibre layer thickness on the optic disc size in confocal scanning laser ophthalmoscopy and optical coherence tomography. Methods. 201 outpatient’s cards with verified diagnosis of glaucoma or with suspicion of glaucoma were retrospectively analyzed. The mean age of the patients was 64 (56; 72) years [Me, (Q1; Q3)]. A group of patients who underwent confocal scanning laser ophthalmoscopy (181 eyes), and a group who underwent optical coherence tomography (183 eyes), were separated. Besides, all the groups were twice divided into 3 subgroups each, b

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2

Hossain, Md Sajid, and Dewan Mohammed Abdul Ahad. "Performance Analysis of Modulation Response of a Designed 1550 nm Oxide Confined Vertical Cavity Surface Emitting Laser." AIUB Journal of Science and Engineering (AJSE) 17, no. 3 (2018): 83–88. http://dx.doi.org/10.53799/ajse.v17i3.13.

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This paper aims to present the impact of using oxidized layer and the effect of oxide aperture size on VCSEL’s modulation performance. After the introduction of oxidized layer, the characteristics of VCSEL have improved immensely, especially in modulation performance. The peak material gain of Al0.06Ga0.24In0.70As/InP MQW VCSEL found from the MATLAB simulation tools has been utilized for investigating the modulation characteristics of the laser model. The optical output power of 27.23 dBm is found at 2.5 mA of current injection. Later, by varying the injection current up to 2.5 mA a maximum fr

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3

Tersoff, J., A. W. Denier van der Gon, and R. M. Tromp. "Critical island size for layer-by-layer growth." Physical Review Letters 72, no. 2 (1994): 266–69. http://dx.doi.org/10.1103/physrevlett.72.266.

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4

Wang, Jun-hua, Fu-zhu Han, and Wei-sheng Ying. "Prediction and verification of the single cladding layer thickness for laser solid forming." MATEC Web of Conferences 242 (2018): 01010. http://dx.doi.org/10.1051/matecconf/201824201010.

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In order to accurately measure the powder effective utilization rate and to predict the single cladding layer thickness in laser solid forming process, a new method to measure powder distribution density is presented in this paper. Using this method, the powder material entering molten pool was collected by a copper tube with the same size as laser spot and its mass was measured to accurately calculate powder effective utilization rate in the laser solid forming process. And then, the single cladding layer thickness were calculated according to the conservation law of powder material mass befo

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Xu, X., and K. H. Song. "Radiative Transfer in Pulsed-Laser-lnduced Plasma." Journal of Heat Transfer 119, no. 3 (1997): 502–8. http://dx.doi.org/10.1115/1.2824124.

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When a high-power pulsed laser interacts with materials, a plasma layer containing micrometer-size particles is formed above the target surface. The laser induced plasma changes the energy coupling mechanism between the laser beam and the target. This work investigates the radiative heat transfer process in the excimer laser generated plasma layer on the Ni specimen, in the laser fluence range between 1.5 and 5 J/cm2. Novel diagnostic techniques are developed to measure transient transmission and scattering of the thin plasma layer within the duration of the laser pulse. Based on the measureme

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6

Yang, Xu, Mingran Pan, Ping Li, et al. "Research on multi-angle lateral laser cladding process of 316L stainless steel." Journal of Physics: Conference Series 2954, no. 1 (2025): 012054. https://doi.org/10.1088/1742-6596/2954/1/012054.

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Abstract Multi-angle transverse laser cladding experiments are conducted using 316L stainless steel powder to investigate the effects of powder feeding rate, laser power, and scanning speed on the cross-sectional size of the cladding layer (cladding layer height, width, and depth) and top offset of the cladding layers at 0°, 45°, 90°, and 135°. Concurrently, the microstructure and hardness of the cladding layer are examined. The results show that increasing the powder feed rate leads to a gradual rise in the cladding layer height from 0° to 135°, with the width initially increasing and then de

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7

Wu, Fengjuan, Weimin Zhou, Lianqiang Shan, et al. "Effect of inside diameter of tip on proton beam produced by intense laser pulse on double-layer cone targets." Laser and Particle Beams 31, no. 1 (2013): 123–27. http://dx.doi.org/10.1017/s0263034612000997.

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AbstractThe laser-driven acceleration of proton beams from a double-layer cone target, comprised of a cone shaped high-Z material target with a low density proton layer, is investigated via two-dimensional fully relativistic electro-magnetic particle-in-cell simulations. The dependence of the inside diameter (ID) of the tip size of a double-layer cone target on proton beam characteristics is demonstrated. Our results show that the peak energy of proton beams significantly increases and the divergence angle decreases with decreasing ID size. This can be explained by the combined effects of a st

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8

Zhou, Zhanwang, Zhenyu Zhao, Jin He, and Ruikang Shi. "Pulsed Laser Polishing of Zirconia Ceramic Microcrack Generation Mechanism and Size Characterization Study." Crystals 14, no. 9 (2024): 810. http://dx.doi.org/10.3390/cryst14090810.

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In order to study the mechanism of microcrack generation in the process of pulsed laser polishing of zirconia ceramics and the influence of laser polishing process parameters on the surface temperature and surface stress, this paper establishes a finite element computational model of pulsed laser polishing of zirconia ceramics based on the COMSOL Multiphysics multi-physics field simulation software. Firstly, in the process of establishing the finite element model, the temperature field and stress field coupling is used to analyze the temperature field and stress field changes during the laser

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9

Chen, Yu Ru, and Long Sun Chao. "Experimental Analysis for Low-Temperature Poly-Si Films Produced by Using the Excimer Laser Annealing Method." Materials Science Forum 505-507 (January 2006): 277–82. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.277.

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This paper is to investigate the effects on grain size of different working conditions for making poly Si films by using the excimer laser annealing method. In this research, a KrF excimer laser of 248 nm in wavelength is used to irradiate a-Si films of 0.1 μm in thickness on glass substrate to produce poly-Si ones. The control parameters are laser intensity (200~500 mJ/cm2), pulse number (1~10 shots) and coverage fraction (0~100%). Besides, the effect of a SiO2 layer is also studied, which is utilized as a heat-isolated zone located between the Si film and glass substrate. Average grain sizes

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10

Ai, H., and J. Gao. "Size-controlled polyelectrolyte nanocapsules via layer-by-layer self-assembly." Journal of Materials Science 39, no. 4 (2004): 1429–32. http://dx.doi.org/10.1023/b:jmsc.0000013910.63194.db.

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11

Huang, Haibo, Wenlei Sun, Yong Huang, and Jiangtong Yu. "Properties of Curved Parts Laser Cladding Based on Controlling Spot Size." Applied Sciences 10, no. 2 (2020): 728. http://dx.doi.org/10.3390/app10020728.

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In this study, a method based on controlling the laser spot size was proposed in the process of curved parts laser cladding, and the coatings obtained by this method were analysed through investigation of the microstructure, microhardness, adhesion property and wear resistance properties. The nonuniform rational B-spline surface (NURBS) reconstruction method was used to obtain the workpiece geometrical characteristics of laser cladding, and through the establishment of a mathematical model, the process of the laser beam working on the curved surface was simplified as the intersection of the cy

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12

Jia, Yanxing, Jun Wang, Qing Ge та ін. "Monolithic integration of 1.3 μm asymmetric lasers grown on silicon and silicon waveguides with tapered coupling". Laser Physics 32, № 9 (2022): 096201. http://dx.doi.org/10.1088/1555-6611/ac8c41.

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Abstract We proposed a design scheme to enable the monolithic integration between a silicon waveguide and a 1.3 μm wavelength band III–V quantum dot laser, which is epitaxially grown on silicon with an asymmetric structure. The III–V laser is grown in a deep trench of a silicon-on-insulator wafer by the selective area epitaxy technique, and a GaAs coupling layer is inserted into the lower cladding layer of the laser, which can make the optical field distribution of the laser shift down. Besides, a mode-size converter with a three-segment tapered structure is designed to couple the output laser

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Mahmood, Muhammad, Asif Ur Rehman, Carmen Ristoscu, et al. "Advances in Laser Additive Manufacturing of Cobalt–Chromium Alloy Multi-Layer Mesoscopic Analytical Modelling with Experimental Correlations: From Micro-Dendrite Grains to Bulk Objects." Nanomaterials 12, no. 5 (2022): 802. http://dx.doi.org/10.3390/nano12050802.

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This study presents two analytical models for the laser powder bed fusion (LPBF) process. To begin, the single layer’s dimensions were measured using principal operating conditions, including laser power, laser scanning speed, powder layer thickness, and hatch distance. The single-layer printing dimensions were transformed into multi-layer printing using the hatch distance. The thermal history of the printed layers was used as an input to the Johnson–Mehl–Avrami-Kolmogorov model to estimate the average dendrite grain size. LPBF experiments were conducted for a Cobalt–chromium (Co–Cr) alloy to

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14

Chen, Ju Fang, Xing Cheng Li, Jiang Tao Wang, and Wei Ning Lei. "Effect of CO₂ Laser Surface Melting on the Microstructure of AZ91D Magnesium Alloy." Key Engineering Materials 464 (January 2011): 461–64. http://dx.doi.org/10.4028/www.scientific.net/kem.464.461.

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In the present study, the effect of laser surface melting (LSM) on microstructure of AZ91D magnesium alloy was investigated with a 2kW continuous wave CO2 laser. The results indicate that both the substrate and laser melted layer mainly consisted of α-Mg and β-Mg17Al12, the amount of β-phase in laser melted layer was decreased as compared to that of the substrate. The microstructure of the laser surface melted zone consists of fine dendrites with an average grain size of less than 10m, the grain size was reduced by a factor of more than 10 times as compared to that of the substrate. The micro

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15

Park, Seong-Hyun, Kiyoon Yi, Peipei Liu, Gwanghwo Choi, Kyung-Young Jhang, and Hoon Sohn. "In situ and layer-by-layer grain size estimation in additively manufactured metal components using femtosecond laser ultrasonics." Journal of Laser Applications 35, no. 2 (2023): 022002. http://dx.doi.org/10.2351/7.0000938.

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Directed energy deposition (DED) is an additive manufacturing technique wherein a focused thermal energy source and a coaxial powder delivery system are combined for the fabrication of metallic parts. Although rapid progress has been made in DED, the amount of research performed for in situ quality monitoring during fabrication is limited. Grain size monitoring during DED is particularly important because the grain size is directly related to the mechanical strength and stiffness of the final products. In this study, a layer-by-layer grain size estimation technique using femtosecond laser ultr

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16

Yu, Jinqing, Xiaolin Jin, Weimin Zhou, et al. "Influence of the initial size of the proton layer in sheath field proton acceleration." Laser and Particle Beams 31, no. 4 (2013): 597–605. http://dx.doi.org/10.1017/s0263034613000517.

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AbstractWe investigate the influence of the initial size of the proton layer on proton acceleration in the interaction of high intensity laser pulses with double-layer targets by using two-dimensional particle-in-cell code. We discuss the influence of proton layer initial sizes on the cut-off energy, energy spread, and divergence angle of proton beam. It is found that Coulomb explosion plays an important role on the proton cut-off energy. This causes the cut-off energy to increase for increasing proton layer thickness, at the expense of energy spread. The proton divergence angle reaches a peak

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17

Kim, Hwan Ju, Hwa Soo Lee, and Yong Jae Chung. "A Study on the Material Characteristics and Functionality Evaluation of a Size Layer of a Canvas." Journal of Conservation Science 32, no. 2 (2016): 167–78. http://dx.doi.org/10.12654/jcs.2016.32.2.06.

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18

Etzold, Bastian J. M., Ioannis Neitzel, Manfred Kett, Florian Strobl, Vadym N. Mochalin, and Yury Gogotsi. "Layer-by-Layer Oxidation for Decreasing the Size of Detonation Nanodiamond." Chemistry of Materials 26, no. 11 (2014): 3479–84. http://dx.doi.org/10.1021/cm500937r.

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19

Guo, Yan Ling, Yue Qiang Yu, and Kai Yi Jiang. "Study on the Forming Accuracy and Density of Eucalyptus/PES Fabricated by Laser Sintering." Key Engineering Materials 667 (October 2015): 200–205. http://dx.doi.org/10.4028/www.scientific.net/kem.667.200.

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. Based on orthogonal test, the forming accuracy and density of laser sintering eucalyptus/PES blend is studied in this paper. It mainly analysed the effect of the powder size and process parameters (such as laser power, layer thickness, preheating temperature, etc) on the forming precision and density of sintered eucalyptus/PES parts, also the correlation analysis of molding error caused by the powder’s physical properties and machine is performed. By measuring the parts’ dimensions, the results show that the laser power and powder size are two main factors influencing parts’ density, and var

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20

Li, Xiaolei, Sen Zhao, Gang Yuan, et al. "Experimental and Thermal Stress Field Numerical Simulation Study on Laser Metal Deposition of Ti-48Al-2Cr-2Nb Alloy." Materials 17, no. 10 (2024): 2189. http://dx.doi.org/10.3390/ma17102189.

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The experimental and numerical simulation analysis of a TiAl alloy by laser metal deposition technology is presented in this paper. The research examines the macroscopic morphology, microstructure, and mechanical properties of samples as laser power varies. It also delves into how the temperature field and residual stress evolve under different laser powers. The results reveal that the microstructure of samples is mainly composed of α2-Ti3Al phase and a γ-TiAl phase and that the details of the microstructure are significantly affected by laser power. As laser power increases, coarse lamellar s

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21

Yue, Kun, Guofu Lian, Meiyan Feng, and Youji Zhan. "Investigation on the effect of powder size on the properties of cladding layer based on RSM." Metallurgical Research & Technology 119, no. 1 (2022): 113. http://dx.doi.org/10.1051/metal/2022003.

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This paper aims to reveal the influence of different TiC powder particle sizes and process parameters on the cladding morphology of composite materials and realize the forming control of cladding layer. The center composite design of response surface method was adopted to analyze the effects of laser power, scanning speed and particle size on the cladding morphology of composite materials. The mathematical models between process parameters, TiC powder particle size and micro-hardness, wear volume of the composite cladding layer were established and confirmed by variance analysis and model veri

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22

Luo, Hai He, De Hui Zou, Zhi Fen Wang, Han Xiong Dong, and Zhong Bo Dong. "Effect of Slab Quality on the Microstructure and Performance of Q345C Hot Rolling Strip Used for Pipe Pile Foundation." Applied Mechanics and Materials 204-208 (October 2012): 1210–14. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.1210.

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The Effect of slab quality on the microstructure and performance of Q345C hot rolling strip for pipe pile foundation were studied by SEM, EBSD, mechanical test and corrosion test. The results showed that the dendrite size of the slab had a great impact on the grain size of the steel. The fine grain structure can significantly improve the mechanical properties of the steel, but to some extent, reduce its corrosion resistance. In the early and later stage of the corrosion reaction, the coarse grain structure can improve the corrosion resistance. However, in the middle stage of the corrosion reac

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23

Dekhtyaruk, L. V., and Yu A. Kolesnichenko. "Kinetic size effects in two-layer plates." Low Temperature Physics 19, no. 9 (1993): 720–26. https://doi.org/10.1063/10.0033497.

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Exact and asymptotic expressions have been obtained for kinetic coefficients of a two-layer plate. It is predicted that their dependence on the ratio of layer thicknesses is nonmonotonic and sensitive to the nature of interaction of electrons with the boundary between the layers. A detailed numerical analysis of transport coefficients over a wide range of layer thicknesses is carried out for different values of parameters describing the bulk and surface relaxation of charge carriers.

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24

Ren, Jie, Kuosheng Jiang, Hui Guo, Dongyang He, Zhongwen Hu, and Ziyang Yin. "Quantitatively evaluate the cylindricity of Large size pipe fitting via laser displacement sensor and Digital twin technology." Frontiers in Computing and Intelligent Systems 2, no. 2 (2023): 75–80. http://dx.doi.org/10.54097/fcis.v2i2.4147.

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The rapid development of intelligent detection technology guarantees accuracy in the assembly process. Aiming to solve the quantitative inspection of the cylindricity of Large size pipe fitting, this paper presents an online method technology using a laser sensor and Digital twin technology. The detection system comprises visual positioning, servo drive, and laser displacement sensor information acquisition systems. After positioning by the machine vision camera system, the servo system and laser displacement sensor scan the large-size pipe fitting layer by layer and establish the information

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25

Downing, Kenneth H. "Support Films with Uniform Hole Size." Microscopy Today 11, no. 5 (2003): 54. http://dx.doi.org/10.1017/s1551929500053293.

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Holey carbon films mounted on standard EM grids are routinely used as specimen supports in electron cryo-microscopy, Adroplet of the sample containing, for example, a suspension of virus particles or protein molecules, is applied to the grid, blotted to a thin layer and rapidly frozen. The particles are then imaged where the liquid spans the holes, without interference from an underlying carbon support film. Many recipes for holey films have been presented in the literature, generaiiy employing some method of forming bubbles in a layer of solvent in which a material is dissolved that then form

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26

Dewan, Raimi, Nuradilah Yusri, and Maheza Irna Mohamad Salim. "Reduced-size Biocompatible Implantable Planar Inverted F- Antenna." ELEKTRIKA- Journal of Electrical Engineering 21, no. 3 (2022): 62–68. http://dx.doi.org/10.11113/elektrika.v21n3.399.

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The existence of implantable antennas presents intrinsic challenges as the performance of the antenna degrades due to the high losses of body tissues. In this study, a reduced-size Planar Inverted F- Antenna (PIFA) operating at Industrial, Scientific Medical (ISM) band (2.4 GHz) is designed and optimized. The design of PIFA is modeled to study and analyze the effect on the implantable antenna by placing it within the human body model, particularly in the arm. Copper is used as the patch material and the ground layer of the proposed antenna with Rogers RO3210 as its substrates. The simulation w

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27

Leskela, Markku, Emma Salmi, and Mikko Ritala. "Atomic Layer Deposited Protective Layers." Materials Science Forum 879 (November 2016): 1086–92. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1086.

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This paper reviews the use of Atomic Layer Deposition (ALD) in protective coatings. Because of the growth principle ALD allows the deposition of dense conformal films on substrates of different size and shape. Recently, ALD has received increasingly interest in deposition of protective coatings. In protective coatings oxides are the most common materials and especially Al, Ti, and Ta oxides have been applied. The use of nanolaminates enables improving the protection properties. Since ALD films are pinhole-free and often thin they are used to protect against moisture, radiation, out-gassing but

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28

Gurkovskaya, E. A. "Thin-layer size-exclusion chromatography of polymers." Russian Journal of Applied Chemistry 81, no. 3 (2008): 360–69. http://dx.doi.org/10.1134/s1070427208030026.

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29

Abdou, G., and M. Yang. "Multi-layer palletisation of multi-size boxes." International Journal of Advanced Manufacturing Technology 10, no. 4 (1995): 292–97. http://dx.doi.org/10.1007/bf01186880.

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30

Djaiz, Azzeddine, and Tayeb A. Denidni. "A reduced-size two-layer bandpass filter." Microwave and Optical Technology Letters 44, no. 6 (2005): 512–15. http://dx.doi.org/10.1002/mop.20683.

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31

Huang, Lei, Haipeng Jiang, and Wei Gao. "Effect of particle size and dust layer size on ignition characteristics of PMMA dust layer on hot surface." Journal of Loss Prevention in the Process Industries 71 (July 2021): 104515. http://dx.doi.org/10.1016/j.jlp.2021.104515.

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32

Özkan, Burcu, Yusuf Dilsiz, Burak Küçükelyas, et al. "Comprehensive optimization of selective laser melting process parameters for microstructure, density, hardness, and tribological performance of pure copper." Science of Sintering, no. 00 (2024): 7. http://dx.doi.org/10.2298/sos240215007o.

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This study is concerned with the optimisation of the processing parameters for the selective laser melting (SLM) of pure copper. The influence of these parameters on the microstructure, density and mechanical properties of copper samples produced by SLM is investigated in detail. Taguchi analysis is used to assess the importance of key building parameters including layer thickness, laser spot size and hatch distance on density. In addition, ANOVA is used to describe the contribution of each parameter to the density. The results reveal that layer thickness is the most effective parameter on den

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Fukano, H., Y. Sakai, K. Yokoyama, et al. "1.3 µm large spot-size laser diodes with laterally tapered active layer." Electronics Letters 31, no. 17 (1995): 1439–40. http://dx.doi.org/10.1049/el:19950965.

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34

Wang, Jin, Xuemin Wang, Jian Yu, et al. "Tailoring the Grain Size of Bi-Layer Graphene by Pulsed Laser Deposition." Nanomaterials 8, no. 11 (2018): 885. http://dx.doi.org/10.3390/nano8110885.

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Improving the thermoelectric efficiency of a material requires a suitable ratio between electrical and thermal conductivity. Nanostructured graphene provides a possible route to improving thermoelectric efficiency. Bi-layer graphene was successfully prepared using pulsed laser deposition in this study. The size of graphene grains was controlled by adjusting the number of pulses. Raman spectra indicated that the graphene was bi-layer. Scanning electron microscopy (SEM) images clearly show that graphene changes from nanostructured to continuous films when more pulses are used during fabrication.

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Fauzun, Fazliana, Syarifah N. Aqida, and Md Saidin bin Wahab. "Laser Surface Modification of AISI 1025 Low Carbon Steel Using Pulsed Nd:YAG Laser for Enhance Surface Properties." Key Engineering Materials 554-557 (June 2013): 596–602. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.596.

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This paper presents laser surface modification of AISI 1025 low carbon steel for enhance surface hardness properties. An Nd:YAG laser system with pulse mode was used in order to modify 10mm thick plate surface. Three controlled parameters were laser power, pulse duration and overlap percentage which ranged from 100W to 200W, 0.4 to 1.0ms and 50% to 90% respectively. The treated samples was characterised for metallographic study and hardness. Metallographic study was conducted using optical microscope for laser modified layer thickness and grain size. Hardness properties were measured using Vic

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Crockford, R. H., and I. R. Willett. "Application of mineral magnetism to describe profile development of toposequences of a sedimentary soil in south-eastern Australia." Soil Research 39, no. 5 (2001): 927. http://dx.doi.org/10.1071/sr00077.

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Mineral magnetism and chemical properties of soil profiles across a valley with an erosion gully in a Yellow Dermosol sedimentary soil suggest that the magnetic profile resulted from a combination of alluviation and pedogenesis. The concentration of soil magnetic minerals in a range of particle sizes (3.36–2 mm to <2 μm) diminished from the surface downwards to a minimum (referred to as layer P), then increased to high values (layer H), after which it decreased to bed rock level at the base layer. It is proposed that the H layer was the surface of a buried soil, and that the ferrimagnetic m

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Hwang, Tae Woo, Sang Wook Han, Dong Myeong Seo, and Young Hoon Moon. "Mechanical and Microstructural Evolutions of the Laser Deposited Titanium Layers under Various Shielding Atmospheres." Materials Science Forum 920 (April 2018): 58–63. http://dx.doi.org/10.4028/www.scientific.net/msf.920.58.

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Direct laser melting process is a kind of prototyping process whereby a 3-D part is built layer-wise by melting the metal powder with laser scanning. The properties of laser melted layer are found to be strongly dependent upon the types of shielding gas used. In this study, the effects of shielding gases on the mechanical and microstructural properties of the deposited titanium layers have been investigated. The laser remelting process has also been implemented at various shielding atmospheres to investigate the changes in surface roughness and hardness of deposited layers. The characterizatio

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Chen, Jie, Deyong Tian, Xiaohong Zhan, Chaoqi Qi, and Junjie Zhou. "Study on grain size of deposition layer in single-layer laser melting deposition additive manufacturing on Invar alloy." Optical Engineering 58, no. 04 (2018): 1. http://dx.doi.org/10.1117/1.oe.58.4.041603.

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Zhang, Wei, Li Zheng Jiang, Rui Quan Wang, and Bo Lin. "Research of Microstructure and Property of Laser Alloying on the Surface of P20 Steel Compared with Nitriding." Advanced Materials Research 217-218 (March 2011): 1629–32. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1629.

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The experiment of laser alloying on the surface of P20 steel was made. Tungsten carbide (WC) powder was used as alloying material. The microstructure and property of laser alloying layer and nitriding layer are studied. The research showed that laser alloying layer had better properties such as minute crystals, deeper layer, higher hardness and good metallurgical bonding with base metal. The average hardness of alloying zone was 600HV0.2. The average hardness of phase-change hard zone was 450HV0.2. P20 steel was widely used in the field of plastic mold manufacture, especially mold core and cav

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40

XU, JIANG, and WENJIN LIU. "THE WEAR BEHAVIOR OF BRUSH-PLATED Ni-W-Co/SiC COMPOSITE LAYER WITH OIL LUBRICATION." Surface Review and Letters 12, no. 04 (2005): 573–78. http://dx.doi.org/10.1142/s0218625x0500744x.

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The wear behavior of brush-plating a Ni-W-Co/SiC composite layer on 1045 steel with oil lubrication is investigated. The composite layer is determined by OM, XRD and TEM. The worn surface of the plated layer is observed with SEM and laser profile analysis. The composition and average size of worn debris are analyzed by means of ferrograph and fluid spectrum. The results show that the brush-plated composite layer with added SiC particles reveals high wear resistance compared to the Ni-W-Co brush-plated layer.

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41

Opalinska, Agnieszka, Iwona Malka, Wojciech Dzwolak, Tadeusz Chudoba, Adam Presz, and Witold Lojkowski. "Size-dependent density of zirconia nanoparticles." Beilstein Journal of Nanotechnology 6 (January 5, 2015): 27–35. http://dx.doi.org/10.3762/bjnano.6.4.

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The correlation between density and specific surface area of ZrO2 nanoparticles (NPs) was studied. The NPs were produced using a hydrothermal process involving microwave heating. The material was annealed at 1100 °C which resulted in an increase in the average grain size of the ZrO2 NPs from 11 to 78 nm and a decrease in the specific surface area from 97 to 15 m2/g. At the same time, the density increased from 5.22 g/m3 to 5.87 g/m3. This effect was interpreted to be the result of the presence of a hydroxide monolayer on the NP surface. A smaller ZrO2 grain size was correlated with a larger co

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Sanpo, Noppakun, Jirasak Tharajak, James Wang, and Christopher C. Berndt. "Surface Investigation of Laser Glazed Mullite Thin Films on Yttria-Stabilized Zirconia Coatings." Applied Mechanics and Materials 804 (October 2015): 104–7. http://dx.doi.org/10.4028/www.scientific.net/amm.804.104.

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Thermal barrier coatings (TBCs) are used in the cooled parts of gas turbines to reduce the temperature of blades and hot engine components, allowing higher operating temperatures and yielding increased efficiency. The corrosive gases which come from combustion of low grade fuels can penetrate into the TBCs and reach the metallic components and bond coat and cause hot corrosion and erosion damage. Mullite thin films have been applied onto the top layer of yttria-stabilized zirconia (YSZ) coatings by sol-gel dipping process in order to decrease the porosity as well as improve thermal stability o

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Dolgova, Svetlana, Alexandr Malikov, Alexander Golyshev, and Aelita Nikulina. "The effect of laser surfacing modes on the geometrical characteristics of the single laser tracks." Metal Working and Material Science 26, no. 2 (2024): 57–70. http://dx.doi.org/10.17212/1994-6309-2024-26.2-57-70.

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Introduction. Laser surfacing is one of the leading trends in the field of additive technologies, which consists in layer-by-layer build of material using a laser as an energy source. To obtain a high-quality product, it is necessary to select the optimal building parameters correctly. The problem is that such optimization is necessary for all equipment, since minor differences in its characteristics can make significant changes in the parameters of layer-by-layer build. In order to determine the optimal build mode, it is enough to analyze the effect of various equipment parameters on the char

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Chen, Bo, Yuhua Huang, Tao Gu, Caiwang Tan, and Jicai Feng. "Investigation on the process and microstructure evolution during direct laser metal deposition of 18Ni300." Rapid Prototyping Journal 24, no. 6 (2018): 964–72. http://dx.doi.org/10.1108/rpj-01-2018-0022.

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Purpose Additive manufacturing is a fabrication technology with flexibility and economy. 18Ni300 is one of maraging steels with ultra-high strength, superior toughness, so it is an excellent candidate of structural material. This paper aims to explore the feasibility of using direct laser metal deposition method to fabricate18Ni300, and the evolution of its microstructure and defects is studied. Design/methodology/approach The experiments were conceived from single-trace-single-layer (STSL) test to multi-trace-multi-layers (MTML) test via single-trace-multi-layers (STML) test. The microstructu

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Labisz, Krzysztof, Tomasz Tański, Beata Krupińska, Mariusz Krupiński, and Wojciech Pakieła. "HPDL Laser Alloying of Al-Si-Cu Alloy with ZrO₂ Powder." Advanced Materials Research 1036 (October 2014): 434–39. http://dx.doi.org/10.4028/www.scientific.net/amr.1036.434.

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The purpose of this paper was the investigation of laser treatment influence on the microstructure and properties of the surface layer of heat treated Al-Si-Cu cast aluminium alloys, using the high power diode laser (HPDL). The performed laser treatment involves remelting and feeding of ZrO2 ceramic powder into the aluminium surface. Based on the performed investigations it was possible to obtain the layer consisting of the heat affected zone, transition zone and remelted zone, without cracks and defects as well as has with a slightly higher hardness value compared to the non remelted material

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Zhang, Ying Yin, Shi Hong Shi, Ge Yan Fu, Ping Zhu, and Wei Cai. "The Influence of Ring Inside-Laser Coaxial Powder Feeding Process Parameter on Forming." Advanced Materials Research 529 (June 2012): 120–24. http://dx.doi.org/10.4028/www.scientific.net/amr.529.120.

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This experiment uses the shower nozzle of the ring laser inside-laser coaxial powder feeding for single channel /layer, defocusing, and multi-channel lap cladding. This study investigates the influence of process parameters (such as the laser power) on forming size and surface morphology. In certain limits, the cladding layer height and width are in positive correlation with laser power and powder feeding rate, and in negative correlation with scanning velocity. When the lap coefficient is 50%, the forming quality is high.

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Fan, Kaijun, Yongjun Shi, Youfan Xu, et al. "Laser Cleaning Combined with Cladding Improves Cladding Quality for Repairing Steel Plates in Pressure Vessels." Coatings 14, no. 4 (2024): 508. http://dx.doi.org/10.3390/coatings14040508.

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Good-quality metallurgical bonding and a high degree of automation are critical for using laser cladding technology in on-site repairs. At present, most of the on-site repairs are carried out manually, which can bring about problems such as complicated operation procedures, uneven repair quality, and personnel injuries. In this study, a surface repair method that combined laser cleaning with cladding (LCC) was proposed. First, the plates were scanned with a high-frequency pulsed laser to remove the surface impurity layer. The surface was then coated with Inconel 625 powder while irradiated wit

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Engehausen, Nick, Jan Thore Benthien, and Jan Lüdtke. "Influence of Particle Size on the Mechanical Properties of Single-Layer Particleboards." Fibers 12, no. 4 (2024): 32. http://dx.doi.org/10.3390/fib12040032.

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While most of the influences on the mechanical properties of particleboard appear to have been investigated, there is a lack of knowledge about the influence of particle size or particle dimensions due to the absence of a suitable particle measuring technique. The introduction of laser-based 3D scanning technology makes it possible to automatically determine the dimensions, surface area, and volume of particles. In this study, the influence of particle size on the mechanical properties of particleboards was investigated. To isolate potentially overlapping influences, single-layer particleboard

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Tanaka, Kenichi, and Xiao Hong Jiang. "Nano-Size Surface Materials Stabilized by Weak Interaction." Materials Science Forum 614 (March 2009): 21–26. http://dx.doi.org/10.4028/www.scientific.net/msf.614.21.

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Scanning tunneling microscopy (STM) proved the existence of quasi-compounds on solid surfaces. A typical example is (-Ag-O-) or (-Cu-O-) chains grown on Ag(110) or Cu(110) surface by exposing to O2. The (-Ag-O-) chains on a Ag(110) reacts with Cu atoms to form a new quasi-compound of (-Cu-O-) chains on the Ag(110) surface. The (-Cu-O-) on the Ag(110) readily decomposes at ca. 570ºK to form Cu6 dots, and a reversible reaction of (Cu2)3 + O2. ↔ (-Cu-O-) takes place by exposing to O2. Deposited Zn, Sn and Ag atoms on a Si(111)-7x7 surface stabilize by forming Zn3, Sn2 and Sn, and Ag in a half uni

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Chen, Ju Fang, Xing Cheng Li, Ren Xing Li, and Lai Di Shen. "Influence of Laser Surface Melting on Wear Resistance of AZ91D Magnesium Alloy." Applied Mechanics and Materials 33 (October 2010): 607–11. http://dx.doi.org/10.4028/www.scientific.net/amm.33.607.

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In the present study, an attempt has been made to improve the surface hardness and wear resistance of magnesium alloy AZ91D by laser surface melting (LSM) with a 2kW continuous wave CO2 laser. The microstructure of the laser surface melted zone consists of fine dendrites with an average grain size of less than 10μm. Micro hardness of the melted zone was improved to 70-85HV as compared to 53HV of the substrate. The wear behavior of the laser surface melted layer was investigated using a ball-on-flat apparatus under dry sliding condition. Compared with the as-received AZ91D, the wear volume of t

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