A research team at City University of Hong Kong (CityU) has achieved a ground-breaking advancement in materials research by successfully developing the world’s first-ever 4D printing for ceramics, which are mechanically robust and can have complex shapes. This could turn a new page in the structural application of ceramics.
Ceramic has a high melting point, so it is difficult to use conventional laser printing to make ceramics. The existing 3D-printed ceramic precursors, which are usually difficult to deform, also hinder the production of ceramics with complex shapes.
To overcome these challenges, the CityU team has developed a novel “ceramic ink”, which is a mixture of polymers and ceramic nanoparticles. The 3D-printed ceramic precursors printed with this novel ink are soft and can be stretched three times beyond their initial length. These flexible and stretchable ceramic precursors allow complex shapes, such as origami folding. With proper heat treatment, ceramics with complex shapes can be made.
The team was led by Professor LU Jian, Vice-President (Research and Technology) and Chair Professor of Mechanical Engineering, who is a distinguished materials scientist with research interests ranging from fabricating nanomaterials and advanced structural materials to the computational simulation of surface engineering.
With the development of the elastic precursors, the research team has achieved one more breakthrough by developing two methods of 4D printing of ceramics.
4D printing is conventional 3D printing combined with the additional element of time as the fourth dimension, where the printed objects can re-shape or self-assemble themselves over time with external stimuli, such as mechanical force, temperature, or a magnetic field.
In this research, the team made use of the elastic energy stored in the stretched precursors for shape morphing. When the stretched ceramic precursors are released, they undergo self-reshaping. After heat treatment, the precursors turn into ceramics.
The resultant elastomer-derived ceramics are mechanically robust. They can have a high compressive strength-to-density ratio (547 MPa on 1.6 g cm-3 microlattice), and they can come in large sizes with high strength compared to other printed ceramics.
“The whole process sounds simple, but it’s not,” said Professor Lu. “From making the ink to developing the printing system, we tried many times and different methods. Like squeezing icing on a cake, there are a lot of factors that can affect the outcome, ranging from the type of cream and the size of the nozzle, to the speed and force of squeezing, and the temperature.”
It took more than two and a half years for the team to overcome the limitations of the existing materials and to develop the whole 4D ceramic printing system.
In the first shaping method, a 3D-printed ceramic precursor and substrate were first printed with the novel ink. The substrate was stretched using a biaxial stretching device, and joints for connecting the precursor were printed on it. The precursor was then placed on the stretched substrate. With the computer-programmed control of time and the release of the stretched substrate, the materials morphed into the designed shape.
In the second method, the designed pattern was directly printed on the stretched ceramic precursor. It was then released under computer-programming control and underwent the self-morphing process.
The innovation was published in the latest issue of top academic journal Science Advances under the title “Origami and 4D printing of elastomer-derived ceramic structures”. All research team members are from CityU, including Dr LIU Guo, Research Assistant, Dr ZHAO Yan, Senior Research Associate, and Dr WU Ge, Research Fellow.
“With the versatile shape-morphing capability of the printed ceramic precursors, its application can be huge!” said Professor Lu. One promising application will be for electronic devices. Ceramic materials have much better performance in transmitting electromagnetic signals than metallic materials. With the arrival of 5G networks, ceramic products will play a more important role in the manufacture of electronic products. The artistic nature of ceramics and their capability to form complex shapes also provide the potential for consumers to tailor-make uniquely designed ceramic mobile phone back plates.
Furthermore, this innovation can be applied in the aero industry and space exploration. “Since ceramic is a mechanically robust material that can tolerate high temperatures, the 4D-printed ceramic has high potential to be used as a propulsion component in the aerospace field,” said Prof Lu.
Riding on the breakthrough in material and 4D-printing technique advancement, Prof Lu said the next step is to enhance the mechanical properties of the material, such as reducing its brittleness.
The Latest on: 4-D printing
via Google News
The Latest on: 4-D printing
- Global 3D Printing Materials Growth Opportunitieson August 23, 2021 at 1:01 am
This research service presents an assessment of the global 3D printing materials market in 2020 and evaluates its future prospects. Unit shipment and revenue forecasts are provided for each segment ...
- Canon launches new bargain multifunction 4-in-1 printeron August 22, 2021 at 1:36 pm
Canon has further expanded its already extensive range of home office printers with this, the PIXMA TR4720. A 4-in-1 machine, the TR4720 can print, copy, scan and even fax, plus it offers multiple ...
- 4D Printing in Healthcare Market Overview, Merger and Acquisitions , Drivers, Restraints and Industry Forecast By 2027on August 20, 2021 at 7:47 am
The increasing technological advancements in 3D printing and rising demand for innovative products in biomedical implants are expected to be some major drivers for the market the global 4D Printing in ...
- Skulls, trophies, lighthouses, oh my! | One 3D print at a time: Union Grove couple turns hobby into businesson August 19, 2021 at 3:33 am
3D printing is no simple task ... “We sold them for about $3 or $4 and gave 50% of the profits to the GoFundMe they had for the Kenosha Strong fundraiser,” said Miranda.
- Is the Desktop Metal share price a 3D printing bet after ExOne takeover?on August 19, 2021 at 1:10 am
The Desktop Metal share price has faltered in 2021. But with the company still in its growth phase, is it a bargain for investors optimistic about the potential of 3D printing?
- Worldwide 3D Printing in Healthcare Industry Size & Share Expected Massive Rise by 2026on August 19, 2021 at 12:47 am
According to the research report, “ [225+ Pages PDF Report] Global 3D printing in healthcare market was approximately USD 1,600 million in 2019 and is anticipated to reach over USD 19,000 million by ...
- Dental 3D Printing Materials Market Worth $2.60 Billion by 2028 - Exclusive Report by Meticulous Research®on August 18, 2021 at 4:39 am
Composites, Metals, Ceramics (Zirconia, Alumina], Application (Dentures, Dental Trays, Crown Models) - Forecast to 2028London, Aug. 18, 2021 (GLOBE NEWSWIRE) -- According to a new market research ...
- Automotive 3D Printing Market Size, Share, Growth,Trends, COVID-19 Analysis and Forecast 2021-2028on August 18, 2021 at 4:26 am
The global Automotive 3D Printing market size is projected to reach US 3211 1 million by 2027 from US 884 6 million in 2020 at a CAGR of 19 7 during 2021 2028 The worldwide Automotive 3D Printing ...
- 4D Printing? Bridging Additive Manufacturing with Smart Materialson August 17, 2021 at 5:23 am
4D printing is nothing more than a digital manufacturing ... that respond to environmental stimuli. Details of the 4-D Printed Cube and the 4-D Printed Truncated Octahedron. Because of the ...
via Bing News