Fabrication of hollow lattice alumina ceramic with good mechanical properties by Digital Light Processing 3D printing technology

2021 ◽  
Author(s):  
Lijun Sun ◽  
Peng Dong ◽  
Yong Zeng ◽  
Jimin Chen
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Alumina Ceramic ◽  
Printing Technology ◽  
Digital Light Processing ◽  
3D Printing Technology

scholarly journals Additive manufacturing of SiBCN/Si3N4w composites from preceramic polymers by digital light processing

RSC Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 5681-5689 ◽  
Author(s):  
Shan Li ◽  
Yubei Zhang ◽  
Tong Zhao ◽  
Weijian Han ◽  
Wenyan Duan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Printing Technology ◽  
Digital Light Processing ◽  
Preceramic Polymers ◽  
3D Printing Technology

SiBCN/Si3N4w components with high mechanical properties were manufactured using DLP 3D-printing technology.

scholarly journals Possible Applications of Additive Manufacturing Technologies in Shipbuilding: A Review

Machines ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 84
Author(s):  
Marcin Ziółkowski ◽  
Tomasz Dyl
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Weight Reduction ◽  
Maritime Industry ◽  
High Quality ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Manufacturing Technologies ◽  
Very High

3D printing conquers new branches of production due to becoming a more reliable and professional method of manufacturing. The benefits of additive manufacturing such as part optimization, weight reduction, and ease of prototyping were factors accelerating the popularity of 3D printing. Additive manufacturing has found its niches, inter alia, in automotive, aerospace and dentistry. Although further research in those branches is still required, in some specific applications, additive manufacturing (AM) can be beneficial. It has been proven that additively manufactured parts have the potential to out perform the conventionally manufactured parts due to their mechanical properties; however, they must be designed for specific 3D printing technology, taking into account its limitations. The maritime industry has a long-standing tradition and is based on old, reliable techniques; therefore it implements new solutions very carefully. Besides, shipbuilding has to face very high classification requirements that force the use of technologies that guarantee repeatability and high quality. This paper provides information about current R&D works in the field of implementing AM in shipbuilding, possible benefits, opportunities and threats of implementation.

scholarly journals Flexible Pressure Sensor with Micro-Structure Arrays Based on PDMS and PEDOT:PSS/PUD&CNTs Composite Film with 3D Printing

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6499
Author(s):  
Yiwei Shao ◽  
Qi Zhang ◽  
Yulong Zhao ◽  
Xing Pang ◽  
Mingjie Liu ◽  
...  
Keyword(s):  
3D Printing ◽  
Pressure Sensor ◽  
Pressure Sensors ◽  
Human Motion ◽  
Bottom Plate ◽  
Durability Test ◽  
Printing Technology ◽  
Digital Light Processing ◽  
3D Printing Technology ◽  
Flexible Pressure Sensor

Flexible pressure sensors are widely used in different fields, especially in human motion, robot monitoring and medical treatment. Herein, a flexible pressure sensor consists of the flat top plate, and the microstructured bottom plate is developed. Both plates are made of polydimethylsiloxane (PDMS) by molding from the 3D printed template. The contact surfaces of the top and bottom plates are coated with a mixture of poly (3,4-ethylenedioxythiophene) poly (styrene sulfonate) (PEDOT:PSS) and polyurethane dispersion (PUD) as stretchable film electrodes with carbon nanotubes on the electrode surface. By employing 3D printing technology, using digital light processing (DLP), the fabrication of the sensor is low-cost and fast. The sensor models with different microstructures are first analyzed by the Finite Element Method (FEM), and then the models are fabricated and tested. The sensor with 5 × 5 hemispheres has a sensitivity of 3.54 × 10−3 S/kPa in the range of 0–22.2 kPa. The zero-temperature coefficient is −0.0064%FS/°C. The durability test is carried out for 2000 cycles, and it remains stable during the whole test. This work represents progress in flexible pressure sensing and demonstrates the advantages of 3D printing technology in sensor processing.

scholarly journals Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Jiawei Liu ◽  
Haijian Su ◽  
Hongwen Jing ◽  
Chengguo Hu ◽  
Qian Yin
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Failure Mode ◽  
Shear Failure ◽  
Rock Joints ◽  
Image Correlation ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Joint Inclination ◽  
Joint Length

In order to overcome the disadvantage of traditional joint fabrication method—inability to reproduce the rough surfaces of practical rock joints—3D-printing technology was applied to restructure five kinds of rough joint according to the failure surface formed by the triaxial prepeak unloading test in this study. And uniaxial compression test was carried out on the rock-like specimens containing closed 3D-printing rough joint to study the effects of joint inclination and joint length on the mechanical properties (peak strength, peak strain, elastic modulus, and secant modulus), cracking process, and failure modes. Besides, digital image correlation (DIC) method and acoustic emission (AE) system are used to investigate the whole evolution process of strain fields and crack propagation during loading. It is found that the mechanical parameters decrease first and then go up as the joint inclination increases, while presenting a continuous downward trend with the increase of joint length. Inclination of 45° and the larger joint length bring more extensive reduction to mechanical properties of specimens. Specimens exhibit typical brittle failure characteristics. The failure mode of specimens affected by different joint inclination is tension-shear failure. And the joint scale rises; the failure mode of specimens changes from tensile failure to shear failure. Larger joint scale results in the longer prepeak fluctuation phase on axial stress-strain curves and more dispersed distribution of high-value AE counts.

Nano Mechanical Properties of Ceramic Polymer Composite Micro Thruster Developed Using 3D Printing Technology

2018 ◽  
Vol 24 (8) ◽  
pp. 5884-5890 ◽  
Author(s):  
Pravin Khandekar ◽  
Kanishka Biswas ◽  
Dushyant Kothari ◽  
H Muthurajan
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Polymer Composite ◽  
Small Angle ◽  
Large Deviation ◽  
Mems Devices ◽  
Long Distance ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Specific Direction

Nano and micro satellites, when revolving around the earth, may drift by very small angle from their orbit. But this small angle drift may result in large deviation from their original orbit over a long distance which these satellite covers over a period of time. For the course correction of these satellites, very small thrust is required in specific direction. Normal propulsion system cannot serve this purpose, because the thrust may be too large for these satellites. That’s where the role of micro thrusters becomes important. These are MEMS devices which can produce very small thrust and can be used for nano and micro satellite propulsion. In this study, we have developed micro thrusters using 3D printing technology from ceramic polymer composite. They have been characterized for different nano mechanical properties to study their suitability for propelling the nano and micro satellite.

scholarly journals Effects of Carbonyl Iron Powder (CIP) Content on the Electromagnetic Wave Absorption and Mechanical Properties of CIP/ABS Composites

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1694
Author(s):  
Wenwen Lai ◽  
Yan Wang ◽  
Junkun He
Keyword(s):  
Mechanical Properties ◽  
Electromagnetic Wave ◽  
3D Printing ◽  
Iron Powder ◽  
Carbonyl Iron ◽  
Functional Material ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Fused Deposition ◽  
Carbonyl Iron Powder

Three-dimensional (3D) printing technology has proven to be a convenient and effective method to fabricate structural electromagnetic wave (EMW) absorbers with tunable EMW absorption properties. To obtain a functional material with strong EMW absorbing performance and excellent mechanical properties for fused deposition modeling (FDM) 3D printing technology, in this work, carbonyl iron powder (CIP)/acrylonitrile-butadiene-styrene copolymer (ABS) composites with different CIP contents were prepared by the melt-mixing process. The effects of the CIP content on the EMW absorption and mechanical properties of CIP/ABS composites were investigated. The CIP/ABS composite with a CIP content of 40 wt.% presented the lowest reflection loss (RL) of −48.71 dB for the optimal impedance matching. In addition, this composite exhibited optimal mechanical properties due to the good dispersion of the CIPs in the matrix ABS. Not only were the tensile and flexural strength similar to pure ABS, but the tensile and flexural modulus were 32% and 37% higher than those of pure ABS, respectively. With a CIP content of 40 wt.%, the CIP/ABS composite proved to be a novel functional material with excellent EMW absorbing and mechanical properties, providing great potential for the development of structural absorbers via FDM 3D printing technology.

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