Results 41 to 50 of about 70,491 (281)

Roles of Free Electrons and H2O2 in the Optical Breakdown-Induced Photochemical Reduction of Aqueous [AuCl4]- [PDF]

, 2017
Free electrons and H2O2 formed in an optical breakdown plasma are found to directly control the kinetics of [AuCl4]− reduction to form Au nanoparticles (AuNPs) during femtosecond laser-assisted synthesis of AuNPs.
John, Mallory G, Meader, Victoria K, Rodrigues, Collin, Tibbetts, Katharine M   +3 more
core   +2 more sources

EBSD Study of Creep‐Induced Lattice Misorientation in MgO‐Particle‐Reinforced Austenitic Steel Composites

Advanced Engineering Materials, EarlyView.
Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller, Amaya Compart, Mahnaz Mehdizadehlima, Serhii Yaroshevskyi, Christos G. Aneziris, Horst Biermann, Anja Weidner   +6 more
wiley   +1 more source

Development of a laser-induced breakdown spectroscopy method for the issues of geological exploration and ecological monitoring of aquatic environments in real time

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2021
Background. Currently, the priority task is to develop the resources of the continental shelf. At the same time, ensuring the environmental safety of marine areas remains an important aspect.
D.Yu. Proshchenko, S.S. Golik, A.Yu. Mayor, A.A. Il'in, A.V. Borovskiy, O.A. Bukin   +5 more
doaj   +1 more source

OC-OT-LIBS: A novel approach to the chemical characterization of single particles [PDF]

, 2016
Spectral identification of individual micro- and nano-sized particles by the sequential intervention of optical catapulting, optical trapping and laser-induced breakdown spectroscopy is presented [1]. The three techniques are used for different purposes.
Fortes, Francisco Javier, Laserna-Vázquez, José Javier, Purohit, Pablo   +2 more
core  

LIBS-Based Detection of Antioxidant Elements in Seeds of Emblica officinalis [PDF]

, 2010
The aim of the study was to determine the effect of the elements of the extract of seed from Emblica officinalis on antioxidant enzymes and osmotic fragility of erythrocytes membrane in normal as well as streptozotocin-induced severely diabetic albino ...
Bicanic, D.D., Mehta, S., Rai, A.K., Rai, D.K., Rai, N.K., Rai, P.K., Sharma, B., Watal, G.   +7 more
core   +2 more sources

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Laser‐Induced Breakdown Spectroscopy Online Quantitative Analysis for Laser Processing

Advanced Photonics Research
Plasma fluctuations, the uncertainty of laser ablation, and bremsstrahlung limit the identification of online element analysis during laser processing and cause difficulty in achieving concentration results with sufficient accuracy and repeatability.
Tianzhuo Zhao, Qixiu Zhong, Shuzhen Nie, XiaoLong Liu, Hong Xiao, Chenxuan Yin, Fanghui Zhong, Yachen Ke, Fei Li   +8 more
doaj   +1 more source

Spectroscopic analysis of magnesium-aluminum alloys by laser induced breakdown spectroscopy

Iraqi Journal of Physics, 2018
In this work, the spectra of plasma glow produced by Nd:YAG laser operated at 1.064 μm on Al-Mg alloys with same molar ratio samples in air were analyzed by comparing the atomic lines of aluminum and magnesium with that of strong standard lines.
Ali A-K. Hussain
doaj   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

LIBS spectroscopy meets the ocean. Chemical analysis of archeological materials in Mediterranean waters [PDF]

, 2015
After decades of development in laboratories and land operations, chemical analysis of submerged objects is starting to become a reality. While the analysis of water at variable depth has been demonstrated in the past using florescence spectroscopy and ...
Laserna-Vázquez, José Javier
core