scholarly journals Gecko-Inspired Biomimetic Surfaces with Annular Wedge Structures Fabricated by Ultraprecision Machining and Replica Molding

ACS Omega ◽  
2021 ◽  
Author(s):  
Tianfeng Zhou ◽  
Benshuai Ruan ◽  
Jiangtao Che ◽  
Hui Li ◽  
Xi Chen ◽  
...  
Keyword(s):  
Ultraprecision Machining ◽  
Replica Molding ◽  
Biomimetic Surfaces

Optical Waveguide SHG Devices Using LiNbO3 Epitaxial Grown and Ultraprecision Machining Technique.

2000 ◽  
Vol 28 (9) ◽  
pp. 600-603 ◽  
Author(s):  
Tatsuo KAWAGUCHI ◽  
Kiminori MIZUUCHI ◽  
Kazuhisa YAMAMOTO ◽  
Takashi YOSHINO ◽  
Minoru IMAEDA ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Ultraprecision Machining

A Versatile Wax Assisted Double Replica Molding and its Application in Flexible Electronic Skin

2021 ◽  
pp. 130132
Author(s):  
Huihui Chai ◽  
Feng Chen ◽  
Zhaoxi Song ◽  
Lulu Xiong ◽  
Gang Xiao ◽  
...  
Keyword(s):  
Replica Molding ◽  
Electronic Skin ◽  
Flexible Electronic

scholarly journals Mineralization of Titanium Surfaces: Biomimetic Implants

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2879
Author(s):  
Javier Gil ◽  
Jose Maria Manero ◽  
Elisa Ruperez ◽  
Eugenio Velasco-Ortega ◽  
Alvaro Jiménez-Guerra ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Dental Implants ◽  
Early Stage ◽  
Calcium Phosphates ◽  
Biological Fixation ◽  
Biomimetic Surfaces ◽  
Titanium Surfaces ◽  
Deposition Processes ◽  
Fast Dissolution ◽  
Plasma Sprayed

The surface modification by the formation of apatitic compounds, such as hydroxyapatite, improves biological fixation implants at an early stage after implantation. The structure, which is identical to mineral content of human bone, has the potential to be osteoinductive and/or osteoconductive materials. These calcium phosphates provoke the action of the cell signals that interact with the surface after implantation in order to quickly regenerate bone in contact with dental implants with mineral coating. A new generation of calcium phosphate coatings applied on the titanium surfaces of dental implants using laser, plasma-sprayed, laser-ablation, or electrochemical deposition processes produces that response. However, these modifications produce failures and bad responses in long-term behavior. Calcium phosphates films result in heterogeneous degradation due to the lack of crystallinity of the phosphates with a fast dissolution; conversely, the film presents cracks, which produce fractures in the coating. New thermochemical treatments have been developed to obtain biomimetic surfaces with calcium phosphate compounds that overcome the aforementioned problems. Among them, the chemical modification using biomineralization treatments has been extended to other materials, including composites, bioceramics, biopolymers, peptides, organic molecules, and other metallic materials, showing the potential for growing a calcium phosphate layer under biomimetic conditions.

Ultrapräzise Hochgeschwindigkeitsbearbeitung*/Ultra-precision high performance cutting - Part 1: Increasing the surface generation rate using tools with multiple cutting edges and high-speed spindels

2015 ◽  
Vol 105 (06) ◽  
pp. 366-370
Author(s):  
L. Schönemann ◽  
W. Preuß ◽  
O. Riemer ◽  
E. Foremny ◽  
E. Brinksmeier ◽  
...  
Keyword(s):  
High Speed ◽  
High Performance ◽  
Generation Rate ◽  
Surface Generation ◽  
Ultraprecision Machining ◽  
Single Edge ◽  
Ultra Precision ◽  
Optical Freeform Surfaces ◽  
Novel Approaches ◽  
Milling Tools

Die ultrapräzise Fräsbearbeitung ist eine flexible Möglichkeit zur Herstellung optischer Freiformflächen. Aufgrund der hohen Genauigkeitsanforderungen kommen hierbei jedoch zumeist einschneidige Werkzeuge und niedrige Spindeldrehzahlen zum Einsatz. Diese Arbeit zeigt zwei neue Ansätze zur Steigerung der Flächenleistung in der Ultrapräzisionsbearbeitung: den Einsatz thermisch verstellbarer Mehrfachwerkzeuge sowie die Verwendung ultrapräziser Hochgeschwindigkeitsspindeln in Verbindung mit neuen Methoden zur Auswuchtung.   Ultraprecision milling is a flexible process for generating optical freeform surfaces. Due to the tight tolerances of such parts, only single-edge tools and low spindle frequencies are applied. This publication presents two novel approaches to increase the surface generation rate in ultraprecision machining: the use of milling tools with multiple cutting edges that are aligned via a thermomechanical actuator and the application of high speed spindels that require novel approaches for balancing.

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