Journal ArticleDOI
Process optimization for PA12/MWCNT nanocomposite manufacturing by selective laser sintering
Reads0
Chats0
TLDR
In this article, the free-form fabrication by SLS of parts made from nanocomposites comprised of polyamide 12 and multiwalled carbon nanotubes (MWCNTs) was investigated.Abstract:
Nanocomposites produced through the addition of carbon nanotubes to a polymeric matrix can improve the material properties. The mobility of the polymer chains is usually affected, and this is also related to the properties. Parts produced with the free-form fabrication process using the selective laser sintering (SLS) technique can be used in different high-performance applications as they do not require expensive tools for their manufacture. A specific field of interest is the aerospace industry which is characterized by a low production volume and the need for materials with a high performance to weight ratio. In this study, the free-form fabrication by SLS of parts made from nanocomposites comprised of polyamide 12 and multiwalled carbon nanotubes (MWCNTs) was investigated. Specimens were manufactured by SLS to identify the appropriate processing parameters to achieve high mechanical properties for aerospace applications. Laser energy density was adjusted to improve the material density, flexural modulus, and stress at 10 % elongation. Design of experiments was used to identify and quantify the effects of various factors on the mechanical properties. The results obtained showed that there was a limit to the amount of MWCNTs which could be mixed with the polyamide powder to improve the mechanical properties since a higher content affected the laser sintering process.read more
Citations
More filters
Journal ArticleDOI
Polymeric composites for powder-based additive manufacturing : materials and applications
TL;DR: A comprehensive review of the recent progress on polymeric composite materials, their powder preparation for additive manufacturing, and functionalities and applications of their printed products is provided in this paper, with a focus on their advantages, limitations and challenges in terms of their productivity and processibility.
Journal ArticleDOI
Recent progress and multifunctional applications of 3D printed graphene nanocomposites
Deepalekshmi Ponnamma,Yifei Yin,Nisa V. Salim,Jyotishkumar Parameswaranpillai,Sabu Thomas,Nishar Hameed +5 more
TL;DR: In this paper, a comprehensive analysis of available peer-reviewed literature in which graphene and/or its derivatives are incorporated into a polymer matrix in order to enhance the final properties and functionalities of the 3D printed structure is presented.
Journal ArticleDOI
A primary study into graphene/polyether ether ketone (PEEK) nanocomposite for laser sintering
TL;DR: In this paper, two methods of preparation of graphene/PEEK powders for laser sintering were proposed and investigated in relation to their microstructure and their properties, showing that the GNP act as a nucleation point in crystallisation of PEEK, being at the center of the spherulites.
Journal ArticleDOI
A Review on the Fabrication Techniques of Functionally Graded Ceramic-Metallic Materials in Advanced Composites
TL;DR: In this paper, an extensive review on the various fabrication techniques of FGMs composed by metallic and ceramic phases is presented, where the powder metallurgy (PM) is the most suitable technique for mass production and up-scaling of the FGMs.
Journal ArticleDOI
High Temperature Laser Sintering (HT-LS): An investigation into mechanical properties and shrinkage characteristics of Poly (Ether Ketone) (PEK) structures
TL;DR: In this paper, the properties of poly ether ketone (PEK) components using the commercial high temperature laser sintering system, EOSINT P800, have been investigated and a non-linear shrinkage profile has been obtained.
References
More filters
Book
Laser Material Processing
TL;DR: In this paper, the effect of reflectivity of the surface, when a pure, monochromatic laser (6) is used, is remedied by the simultaneous application of a relatively shorter wavelength beam (1).
BookDOI
Rapid manufacturing : an industrial revolution for the digital age
TL;DR: In this paper, the authors present a discussion of the potential of rapid manufacturing in the automotive industry and present a case study of how to modify a garden fork handle in order to make it more efficient.
BookDOI
Functionally Graded Materials
Book
Carbon materials for advanced technologies
TL;DR: McEnaney et al. as mentioned in this paper discussed the structure and bonding in carbon materials and their application in automotive applications, including the use of carbon fiber composites for batteries. But they did not discuss the application of carbon fibers in cars.