Preparation of high-strength Si3N4 antenna window using selective laser sintering

2021 ◽  
Author(s):  
Kejie Wang ◽  
Chonggao Bao ◽  
Chengyu Zhang ◽  
Yinghong Li ◽  
Rongzhen Liu ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
High Strength ◽  
Laser Sintering

scholarly journals Fabrication of Natural Flake Graphite/Ceramic Composite Parts with Low Thermal Conductivity and High Strength by Selective Laser Sintering

2020 ◽  
Vol 10 (4) ◽  
pp. 1314
Author(s):  
Haihua Wu ◽  
Kui Chen ◽  
Yafeng Li ◽  
Chaoqun Ren ◽  
Yu Sun ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Ceramic Composite ◽  
Selective Laser Sintering ◽  
High Strength ◽  
Laser Sintering ◽  
Post Processing ◽  
Composite Part ◽  
Low Thermal Conductivity ◽  
Powder Composition

The 3D graphite/ceramic composite prototyping parts directly prepared by selective laser sintering (SLS) were porous, which led to poor strength and low thermal conductivity. In order to obtain low thermal conductivity and high strength, its thermal conductivity and compressive strength were adjusted by changing the mixture powder composition and adding post-processing. The result showed that the addition of silicon powder in the mixture powder could significantly improve the compressive strength and thermal conductivity. The addition of expanded graphite was beneficial to the formation of the closed pores in the matrix, which slightly reduced the compressive strength but significantly reduced the thermal conductivity. The 3D graphite/ceramic composite part showed an order of magnitude improvement in compressive strength (from 1.25 to 13.87 MPa) but relatively small change in thermal conductivity (from 1.40 to 2.12 W·m−1K−1) and density (from 0.53 to 1.13 g·cm−3) by post-processing. Reasonable mixture powder composition and post-processing were determined and realized the possibility of fabricating a 3D graphite/ceramic composite part with low thermal conductivity but high compressive strength. Furthermore, it could be used for the repeated casting of steel castings, and through the comparative analysis of casting defects, the prepared graphite/ceramic composite part was expected to replace water glass sand mold.

scholarly journals Preparation of high-strength Si3N4 antenna window using selective laser sintering

2021 ◽  
Author(s):  
Kejie Wang ◽  
Chonggao Bao ◽  
Chengyu Zhang ◽  
Yinghong Li ◽  
Rongzhen Liu ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
High Strength ◽  
Laser Sintering

Design of Small Scale Selective Laser Sintering 3D Printer

2017 ◽  
Author(s):  
Elise M. Hough ◽  
Alexander J. Gurr ◽  
Branden Hans ◽  
Zack D. Annala ◽  
Ryan Gar ◽  
...  
Keyword(s):  
3D Printing ◽  
Preliminary Analysis ◽  
Selective Laser Sintering ◽  
High Strength ◽  
Laser Sintering ◽  
Small Scale ◽  
3D Printer ◽  
Test Results ◽  
Key Features ◽  
Expensive Process

There are several 3D printing technologies available, each offering unique benefits and drawbacks. Selective Laser Sintering (SLS) 3D printing is an up and coming market that offers high resolution and high strength components, but is generally a more expensive process reserved for advanced applications. This paper presents the design and analysis of an affordable small-scale Selective Laser Sintering (SLS) 3D printer, designed to be produced and utilized be everyday consumers. The project management structure, the design process, and preliminary analysis are key features throughout. A continuation paper publication will regard the finished SLS printer, production process, experimentation, testing, and test results.

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