RAM Materials and Structures Manufactured Using Additive Techniques for Military Applications

RAM Materials and Structures Manufactured Using Additive Techniques for Military Applications

Wojciech PRZYBYŁ

Abstract. This paper reviews contemporary radar-absorbing materials (RAM) exhibiting strong microwave attenuation. It discusses fundamental dissipation mechanisms, impedance matching principles and major RAM classes, including carbon composites, ferrites, conductive polymers and metamaterials. The experimental section examines polylactide (PLA) reinforced with flake graphene for fused-filament fabrication, evaluating its microwave absorption efficiency and shielding effectiveness as a structural material for additively manufactured electronic enclosures.

Keywords
RAM, RCS, Stealth, Polymer Composites, Graphene

Published online 1/25/2026, 9 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Wojciech PRZYBYŁ, RAM Materials and Structures Manufactured Using Additive Techniques for Military Applications, Materials Research Proceedings, Vol. 62, pp 142-150, 2026

DOI: https://doi.org/10.21741/9781644904015-18

The article was published as article 18 of the book Terotechnology XIV

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] E.F. Knott et al., Radar cross section, SciTech Publishing, 2004.
[2] P. Thomas et al., Wideband radar absorbing structure using polyaniline-graphene nanocomposite, C 6 (2020) art. 72. https://doi.org/10.3390/c6040072
[3] I. Plebankiewicz et al., Ochrona krzemowych paneli fotowoltaicznych i ładowarek słonecznych przed rozpoznaniem radarowym, Przegląd Elektrotechniczny 100 (2024) 154-157. https://doi.org/10.15199/48.2024.11.28
[4] I. Huynen et al., Multifunctional hybrids for electromagnetic absorption. Acta Materialia, 59 (2011) 3255-3266. https://doi.org/10.1016/j.actamat.2011.01.065
[5] D. Micheli et al., Broadband electromagnetic absorbers using carbon nanostructure-based composites. IEEE Trans. Microwave Theory and Techniques 59 (2011) 2633-2646. https://doi.org/10.1109/TMTT.2011.2160198
[6] F. Ruiz-Perez et al., Carbon-based radar absorbing materials: A critical review. Journal of Science: Advanced Materials and Devices 7 (2022) art.100454. https://doi.org/10.1016/j.jsamd.2022.100454
[7] A.K. Saha, W.G. Pendleton, Role of Dielectric Loss in Microwave Absorber Design. SoutheastCon, Mobile, AL, USA, (2022) 542-543. https://doi.org/10.1109/SoutheastCon48659.2022.9764067
[8] W. Przybył et al., Microwave absorption properties of carbonyl iron-based paint coatings for military applications. Defence Technology 22 (2023) 1-9. https://doi.org/10.1016/j.dt.2022.06.013
[9] M.I. Skolnik, Introduction to radar systems, Vol. 3, New York: McGraw-Hill, New York, 1980, pp. 81-92.
[10] W. Przybył et al., Badania radarowe paneli fotowoltaicznych w kontekście ich ochrony radiolokacyjnej. Przegląd Elektrotechniczny 65 (2024) 6-10. https://doi.org/10.15199/13.2024.9.1
[11] S. Jovanović et al., A review on graphene and graphene composites for application in electromagnetic shielding, Graphene and 2D Materials 8 (2023) 59–80. https://doi.org/10.1007/s41127-023-00065-3
[12] A. Munir, Microwave radar absorbing properties of multiwalled carbon nanotubes polymer composites: A review, Advanced Electromagnetics 6 (2007) 10-19. https://doi.org/10.1002/adv.21617
[13] H. Bayrakdar, Complex permittivity, complex permeability and microwave absorption properties of ferrite–paraffin polymer composites, Journal of Magnetism and Magnetic Materials 323 (2011) 1882-1885. https://doi.org/10.1016/j.jmmm.2011.02.030
[14] S. Bashir et al., Interactive nanomaterials for energy storage and conversion, in: Nanostructured materials for sustainable energy: design, evaluation, and applications, American Chemical Society, 2022, pp. 27-81. https://doi.org/10.1021/bk-2022-1421.ch002
[15] Y. Du et al., Shell thickness-dependent microwave absorption of core-shell Fe3O4@C composites. ACS Applied Materials & Interfaces 6 (2014) 12997-13006. https://doi.org/10.1021/am502910d
[16] Y.B. Feng et al., Absorbing properties and structural design of microwave absorbers based on carbonyl iron and barium ferrite, Journal of Magnetism and Magnetic Materials 318 (2007) 8-13. https://doi.org/10.1016/j.jmmm.2007.04.012
[17] J. Lyu et al., Nanofibrous kevlar aerogel films and their phase-change composites for highly efficient infrared stealth, ACS Nano 13 (2019) 2236-2245. https://doi.org/10.1021/acsnano.8b08913
[18] D.X. Yan et al., Structured reduced graphene oxide/polymer composites for ultra-efficient electromagnetic interference shielding, Advanced Functional Materials 25 (2015) 559-566. https://doi.org/10.1002/adfm.201403809
[19] Z. Chen et al., Lightweight and flexible graphene foam composites for high-performance electromagnetic interference shielding, Advanced Materials 25 (2013) 1296-1300. https://doi.org/10.1002/adma.201204196
[20] Z. Wang et al., Dielectric and microwave attenuation properties of graphene nanoplatelet-epoxy composites, AIP Advances 4 (2014) art.017139. https://doi.org/10.1063/1.4863687
[21] Y. Sani et al., Enhanced electromagnetic microwave absorbing performance of carbon nanostructures for RAMs: A review, Applied Surface Science Advances 18 (2023) art.100455. https://doi.org/10.1016/j.apsadv.2023.100455
[22] J. Liu et al., Hydrophobic, flexible, and lightweight MXene foams for high-performance electromagnetic-interference shielding. Advanced Materials 29 (2017) art.1702367. https://doi.org/10.1002/adma.201702367
[23] A. Gadek-Moszczak, Z. Sabina, Description of 3d microstructure of the composites with polypropylene (pp) matrix and tuf particles fillers, Solid State Phenomena 197 (2013) 186-191. https://doi.org/10.4028/www.scientific.net/SSP.197.186
[24] A. Dudek, M. Klimas, Composites based on titanium alloy Ti-6Al-4V with an addition of inert ceramics and bioactive ceramics for medical applications fabricated by spark plasma sintering (SPS method), Materialwissenschaft und Werkstofftechnik 46 (2015) 237-247. https://doi.org/10.1002/mawe.201500334
[25] O. Kędzia et al., Glass and glass-ceramic porous materials for biomedical applications, System Safety: Human – Technical Facility – Environment 5 (2023) 302-310. https://doi.org/10.2478/czoto-2023-0033
[26] D. Klimecka-Tatar, The powdered magnets technology improvement by biencapsulation method and its effect on mechanical properties, Manufacturing Technology 14 (2014) 30-36.
[27] W. Przybył et al., Microwave absorption properties of carbonyl iron-based paint coatings for military applications, Defence Technology 22 (2023) 1-9. https://doi.org/10.1016/j.dt.2022.06.013
[28] W. Zórawski et al., Plasma-sprayed composite coatings with reduced friction coefficient, Surface and Coatings Technology 202 (2008) 4578-4582. https://doi.org/10.1016/j.surfcoat.2008.04.026
[29] N. Radek, B. Antoszewski, The influence of laser treatment on the properties of electro-spark deposited coatings, Kovove Materialy 47 (2009) 31-38.
[30] N. Radek et al., The effect of laser beam processing on the properties of WC-Co coatings deposited on steel, Materials 14 (2021) art. 538. https://doi.org/10.3390/ma14030538
[31] N. Radek et al., Electrospark alloying of carbon steel with WC-Co-Al2O3: Deposition technique and coating properties, Advanced Materials Research 874 (2014) 101-106. https://doi.org/10.4028/www.scientific.net/AMR.874.101
[32] J. Pietraszek et al., Advanced statistical refinement of surface layer’s discretization in the case of electro-spark deposited carbide-ceramic coatings modified by a laser beam, Solid State Phenomena 197 (2013) 198-202. https://doi.org/10.4028/www.scientific.net/SSP.197.198
[33] P.A. Laski, Proportional valve with a piezoelectric actuator, EPJ Web of Conferences 143 (2017) art. 02064. https://doi.org/10.1051/epjconf/201714302064
[34] D.S. Pietrala, P.A. Laski, Design and Control of a Pneumatic Muscle Servo Drive Containing Its Own Pneumatic Muscles, Applied Sciences 12 (2022) art. 11024. https://doi.org/10.3390/app122111024
[35] I. Krzysztofik et al., Selected methods of control of the scanning and tracking gyroscope system mounted on a combat vehicle, Annual Reviews in Control 44 (2017) 173-182. https://doi.org/10.1016/j.arcontrol.2016.10.003
[36] J. Smyrski et al., Design of the forward straw tube tracker for the PANDA experiment, Journal of Instrumentation 12 (2017) art. C06032. https://doi.org/10.1088/1748-0221/12/06/C06032
[37] P. Krysiak, Microstructural Analysis of Wound Composites with Considerations on the Fiber Winding Force, Mater. Res. Proc. 34 (2023) 43-52. https://doi.org/10.21741/9781644902691-6
[38] P. Krysiak et al., Comparative Analysis of the Strain in Composite Rings Fabricated with Fibre Prestressing, Mater. Res. Proc. 45 (2024) 91-100. https://doi.org/10.21741/9781644903315-12
[39] P. Krysiak et al., Strength testing of a composite mounting frame for a multi-sensor detection system, Mater. Res. Proc. 17 (2020) 165-170. https://doi.org/10.21741/9781644901038-25
[40] D. Klimecka-Tatar, M. Ingaldi, Assessment of the technological position of a selected enterprise in the metallurgical industry, Mater. Res. Proc. 17 (2020) 72-78. https://doi.org/10.21741/9781644901038-11
[41] A. Pacana, K. Czerwińska, Indicator analysis of the technological position of a manufacturing company, Prod. Eng. Arch. 29 (2023) 162-167. https://doi.org/10.30657/pea.2023.29.19
[42] D. Klimecka-Tatar, R. Dwornicka, The assembly process stability assessment based on the strength parameters statistical control of complex metal products, METAL 2019 – 28th Int. Conf. Metall. Mater. (2019) 709-714.
[43] E. Kozień, M.S. Kozień, Ex-ante risk estimation in the production project, System Safety: Human – Technical Facility – Environment 1 (2019) 708-715. https://doi.org/10.2478/czoto-2019-0090
[44] J. Pietraszek, E. Skrzypczak-Pietraszek, The optimization of the technological process with the fuzzy regression, Advanced Materials Research 874 (2014) 151-155. https://doi.org/10.4028/www.scientific.net/AMR.874.151
[45] D. Klimecka-Tatar, Value Stream Mapping as Lean Production tool to improve the production process organization – Case study in packaging manufacturing, Prod. Eng. Arch. 17 (2017) 40-44. https://doi.org/10.30657/pea.2017.17.09
[46] M. Ingaldi, D. Klimecka-Tatar, Digitization of the service provision process – Requirements and readiness of the small and medium-sized enterprise sector, Procedia Computer Science 200 (2022) 237-246. https://doi.org/10.1016/j.procs.2022.01.222
[47] M.S. Kozień, J. Wiciak, Passive structural acoustic control of the smart plate – FEM simulation, Acta Physica Polonica A 118 (2010) 1186-1188. https://doi.org/10.12693/APhysPolA.118.1186
[48] R. Dwornicka, J. Pietraszek, The outline of the expert system for the design of experiment, Production Engineering Archives 20 (2018) 43-48. https://doi.org/10.30657/pea.2018.20.09
[49] A. Pacana et al., Life Cycle Assessment (LCA) of Truck Steel Wheels, Mater. Res. Proc. 45 (2024) 213-222. https://doi.org/10.21741/9781644903315-25
[50] E. Kozień, A. Kozień, The Importance of Corporate Social Responsibility from the Perspective of Customers in the Light of Own Research, Mater. Res. Proc. 45 (2024) 249-257. https://doi.org/10.21741/9781644903315-29
[51] E. Skrzypczak-Pietraszek, A.G. Pietraszek, Phytoremediation and Allelopathy as an Element of Sustainable Circular Economy to Prevent Environmental Pollution, Mater. Res. Proc. 45 (2024) 140-145. https://doi.org/10.21741/9781644903315-17
[52] T. Lipinski, Corrosion effect of 20 % NaCl solution on basic carbon structural S235JR steel, Engineering for Rural Develop. 16 (2017) 1069-1074. https://doi.org/10.22616/ERDev2017.16.N225
[53] R. Ulewicz et al., Fatigue strength of ductile iron in ultra-high cycle regime, Advanced Materials Research 874 (2014) 43-48. https://doi.org/10.4028/www.scientific.net/AMR.874.43
[54] T. Lipinski, J. Pietraszek, Influence of animal slurry on carbon C35 steel with different microstructure at room temperature, Engineering for Rural Develop. 21 (2022) 344-350. https://doi.org/10.22616/ERDev.2022.21.TF115