Additive Manufacturing of fused silica using Coaxial Laser Glass Deposition: Experiment, Simulation and Discussion

2021 ◽  
Author(s):  
Tobias Grabe ◽  
Marius Lammers ◽  
Song Wang ◽  
Xuejian Wang ◽  
Katharina Rettschlag ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Fused Silica ◽  
Laser Glass

scholarly journals Design and Fabrication Technology of Metal Mirrors Based on Additive Manufacturing: A Review

2021 ◽  
Vol 11 (22) ◽  
pp. 10630
Author(s):  
Kai Zhang ◽  
Hemeng Qu ◽  
Haijun Guan ◽  
Jizhen Zhang ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Complex Structure ◽  
Glass Ceramics ◽  
Fused Silica ◽  
Structure Design ◽  
Design Methods ◽  
Powder Materials ◽  
Fabrication Technology ◽  
The Common ◽  
New Generation

In recent years, much progress has been made on the development of metal mirrors based on additive manufacturing (AM). The sandwich mirror is well known for its excellent mechanical properties and challenging machining. Now, AM can be used to fabricate this complex structure and reduce the processing time and cost. In addition, with the aid of some new design methods for additive manufacturing, such as lattice, topology optimization (TO), and Voronoi, the freedom of mirror structure design is enormously improved. The common materials of mirrors include ceramics (SiC), glasses (glass ceramics, fused silica), and metals (aluminum, beryllium). Among them, the AM technology of metals is the most mature and widely used. Researchers have recently extensively developed the new-generation metal mirror to improve performance and lightweight rate. This review focuses on the following topics: (1) AM technologies and powder materials for metal mirrors, (2) recent advances in optomechanical design methods for AM metal mirrors, (3) challenges faced by AM metal mirrors in fabricating, and (4) future trends in AM metal mirrors.

scholarly journals Melt‐Extrusion‐Based Additive Manufacturing of Transparent Fused Silica Glass (Adv. Sci. 23/2021)

2021 ◽  
Vol 8 (23) ◽  
pp. 2170159
Author(s):  
Markus Mader ◽  
Leonhard Hambitzer ◽  
Phillip Schlautmann ◽  
Sophie Jenne ◽  
Christian Greiner ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Silica Glass ◽  
Fused Silica ◽  
Melt Extrusion ◽  
Fused Silica Glass

scholarly journals Additive manufacturing of glass: CO2-Laser glass deposition printing

Procedia CIRP ◽  
2018 ◽  
Vol 74 ◽  
pp. 272-275 ◽  
Author(s):  
Philipp von Witzendorff ◽  
Leonhard Pohl ◽  
Oliver Suttmann ◽  
Peter Heinrich ◽  
Achim Heinrich ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Co2 Laser ◽  
Laser Glass

Material loss analysis in glass additive manufacturing by laser glass deposition

2021 ◽  
Vol 33 (4) ◽  
pp. 042050
Author(s):  
Khodor Sleiman ◽  
Katharina Rettschlag ◽  
Peter Jäschke ◽  
Nicholas Capps ◽  
Edward C. Kinzel ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Material Loss ◽  
Laser Glass ◽  
Loss Analysis ◽  
Glass Additive

SEM analysis of DC magnetron sputtered beryllium films

1988 ◽  
Vol 46 ◽  
pp. 960-961
Author(s):  
E. F. Lindsey ◽  
C. W. Price ◽  
E. L. Pierce ◽  
E. J. Hsieh
Keyword(s):  
Fine Structure ◽  
Electron Emission ◽  
Secondary Electron ◽  
Low Voltage ◽  
Ion Beam ◽  
Secondary Electron Emission ◽  
Sem Analysis ◽  
Fused Silica ◽  
Grain Structure ◽  
Silica Substrate

Columnar structures produced by DC magnetron sputtering can be altered by using RF biased sputtering or by exposing the film to nitrogen pulses during sputtering, and these techniques are being evaluated to refine the grain structure in sputtered beryllium films deposited on fused silica substrates. Beryllium is brittle, and fractures in sputtered beryllium films tend to be intergranular; therefore, a convenient technique to analyze grain structure in these films is to fracture the coated specimens and examine them in an SEM. However, fine structure in sputtered deposits is difficult to image in an SEM, and both the low density and the low secondary electron emission coefficient of beryllium seriously compound this problem. Secondary electron emission can be improved by coating beryllium with Au or Au-Pd, and coating also was required to overcome severe charging of the fused silica substrate even at low voltage. The coating structure can obliterate much of the fine structure in beryllium films, but reasonable results were obtained by using the high-resolution capability of an Hitachi S-800 SEM and either ion-beam coating with Au-Pd or carbon coating by thermal evaporation.

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