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http://dx.doi.org/10.1098/rsta.2012.0178 | DOI Listing |
3D Print Addit Manuf
October 2024
State Key Laboratory of Tribology, Department of Mechanical Engineering, Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment Control, Tsinghua University, Beijing, China.
The use of deformable materials in 3D printing has allowed for the fabrication of intricate soft robotics prototypes. Polyjet technology, with its ability to print multiple materials in a single print, has been popular in creating such designs. Vero and Agilus, the commercial materials provided by Polyjet, possess shape memory properties, making Polyjet ideal for high-precision and transformable applications.
View Article and Find Full Text PDFJ Xray Sci Technol
December 2024
Center of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China.
Background: Recent studies have explored layered correction strategies, employing a slice-by-slice approach to mitigate the prominent limited-view artifacts present in reconstructed images from high-pitch helical CT scans. However, challenges persist in determining the angles, quantity, and sequencing of slices.
Objective: This study aims to explore the optimal slicing method for high pitch helical scanning 3D reconstruction.
Langmuir
December 2024
School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300130, China.
When chemical mechanical polishing (CMP) of tantalum (Ta)-based barrier layers is done through silicon via (TSV), it is necessary to control the rate selection of copper (Cu) and Ta to prevent the formation of dishing pit formation due to the rapid removal rate (RR) of copper in the via compared to tantalum outside the via. This paper selected 2-mercapto-1-methylimidazole (TAMZ) as an inhibitor, which has the dual effect of reducing the RR of Cu and increasing the RR of Ta. The experimental results show that the rate selection ratio of Cu and Ta is up to 2.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
Center of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin 150080, China.
Sensors (Basel)
November 2024
College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China.
Ultrasonic vibration-assisted grinding is a critical method for machining ultra-hard optical molds. However, current ultrasonic-assisted grinding spindles, as essential foundational equipment, face limitations in maintaining ultra-high rotational speed, high precision, and a compact structure during ultrasonic operation. This study presents a novel ultra-precision ultrasonic-assisted high-speed aerostatic spindle for grinding ultra-hard optical molds, developed through theoretical calculations, FEM, and CFD simulations.
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