Results 1 to 10 of about 1,974,579 (169)

On-machine measurement and compensation machining for ultra-precision cutting of optical aspheric surface

open access: yesJin'gangshi yu moliao moju gongcheng, 2022
An in-situ measurement device combining contact probe and capacitive displacement sensor is developed. An aspherical measurement and compensation machining software is also developed. The single point diamond ultra precision cutting experiments for C3604
Liang ZHANG   +6 more
doaj   +1 more source

High-Efficiency Polarization Multiplexing Metalenses [PDF]

open access: yesNanomaterials, 2022
The polarization multiplexing technique is a well-established method that improves the communication capacity of an optical system. In this paper, we designed orthogonal linear and circular polarization multiplexing metalens using a library of rectangle TiO2 nanostructures.
Xueping Sun   +8 more
openaire   +4 more sources

Segmented Four-Element Photodiodes in a Three-Dimensional Laser Beam Angle Measurement

open access: yesPhotonics, 2023
Based on the registration of two laser beam projections, a method for measuring the angular deviation of a laser beam from its initial position in three-dimensional space is proposed and experimentally demonstrated.
Stanislav Konov   +4 more
doaj   +1 more source

On Defect Minimization Caused by Oxide Phase Formation in Laser Powder Bed Fusion

open access: yesMetals, 2022
The article is devoted to the compressive review of the defects observed in the products of the machinery usage made mainly of anti-corrosion steels of the martensite-austenite group, difficult to process materials such as pure titanium, nickel, and ...
Anna A. Okunkova   +6 more
doaj   +1 more source

The Effect of Plasma–Electrolytic Nitrocarburizing of a Medium Carbon Steel Surface on Friction and Wear in Pair with Tin–Lead Bronze

open access: yesMetals, 2023
The possibility of increasing the durability of steel pins working against bronze bushings through plasma–electrolytic nitrocarburizing of the surface of medium carbon steel is shown.
Anatoly Borisov   +6 more
doaj   +1 more source

Possibilities of Additive Technologies for the Manufacturing of Tooling from Corrosion-Resistant Steels in Order to Protect Parts Surfaces from Thermochemical Treatment

open access: yesMetals, 2021
The structure and physical–mechanical properties of products made from powders of corrosion-resistant steel 12X18H10T by the laser-beam powder bed fusion (LB-PBF) and subsequent ion-plasma nitriding in the work were investigated.
Alexander Metel   +5 more
doaj   +1 more source

Beam Shaping in Laser Powder Bed Fusion: Péclet Number and Dynamic Simulation

open access: yesMetals, 2022
A uniform distribution of power density (energy flux) in a stationary laser beam leads to a decrease in the overheating of the material in the center of the laser beam spot during laser powder bed fusion and a decrease in material losses due to its ...
Sergey N. Grigoriev   +6 more
doaj   +1 more source

Microtexturing of TiZrN-Coated Si3N4 cutting inserts for machining nickel alloy [PDF]

open access: yesEPJ Web of Conferences
Insulating cutting ceramics exhibit outstanding mechanical and thermal properties but have electrical conductivity below the percolation threshold. It does not allow sophisticated shapes to be obtained by diamond grinding and polishing.
Volosova Marina A.   +4 more
doaj   +1 more source

Surface Hardening of Machine Parts Using Nitriding and TiN Coating Deposition in Glow Discharge

open access: yesMachines, 2020
Surface hardening of machine parts substantially improves their performance. The best results are obtained when combined hardening consists of surface nitriding and subsequent deposition of hard coatings.
Alexander Metel   +4 more
doaj   +1 more source

Photoinhibiting via simultaneous photoabsorption and free-radical reaction for high-fidelity light-based bioprinting

open access: yesNature Communications, 2023
Light-based 3D bioprinting is now employed widely to fabricate geometrically complex constructs for various biomedical applications. However, the inherent light scattering defect creates significant challenges in patterning dilute hydrogels to form high ...
Ning He   +11 more
doaj   +1 more source

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