Whisker orientation controls wear of 3D-printed epoxy nanocomposites

Effects of infill patterns on the strength and stiffness of 3D printed topologically optimized geometries

“…The collection of print paths that make up a given structure will be referred to as the “infill pattern.” The specific choice of print path and infill pattern can have profound implications for the performance of the printed component due to anisotropy that may arise as a result of the print path and the nature of material extrusion AM. For traditional polymer FFF processes, anisotropy is primarily associated with a weak bond between successive deposition print paths (Ahn et al , 2002; Bellini and Güçeri, 2003; Sun et al , 2008), while material extrusion AM of composite materials brings the added complexity that filler materials partially or fully orient along the print direction (Calvert et al , 1997; Compton and Lewis, 2014; Duty et al , 2017; Hmeidat et al , 2018; Peng et al , 1999; Pierson et al , 2019; Shofner et al , 2003; Tekinalp et al , 2014; Grejtak et al , 2020; Trigg et al , 2021). In this case, the anisotropy in a printed composite component may be the result of a combination of intrinsic material anisotropy and extrinsic bonding-related anisotropy.…”

Additive Manufactured Carbon Nanotube/Epoxy Nanocomposites for Heavy-Duty Applications

“…This was caused by the weight of the stacked layers, which deformed previously printed but uncured layers once the load exerted by the part weight exceeded the zero-shear viscosity of the resin . As a result, the height of printed parts was typically limited to 10 mm. , Only some articles reported high printed epoxy parts with dual cured epoxy resin or fast gelling epoxy formulations . Solid epoxy resins do allow for overcoming the height limitation; to demonstrate this, we printed and cured a nanocomposite duck (the icon of our group) with a height of 48 mm (seen in the abstract graphic).…”

“… 25 As a result, the height of printed parts was typically limited to 10 mm. 26 , 27 Only some articles reported high printed epoxy parts with dual cured epoxy resin 28 or fast gelling epoxy formulations. 29 Solid epoxy resins do allow for overcoming the height limitation; to demonstrate this, we printed and cured a nanocomposite duck (the icon of our group) with a height of 48 mm (seen in the abstract graphic).…”

Preparation and mechanical performance of SiCw/geopolymer composites through direct ink writing

“…20,24 Moreover, the size of the whisker is between microns and nanometers, and it can be well dispersed in the matrix during ink extrusion. 25 Among all kinds of whiskers, SiC whisker (SiC w ) has superior tensilestrength due to its monocrystalline structure. 26 Therefore, SiC w will be an appropriate candidate for re-enforcing the mechanical properties of ceramic material.…”

“…Among these, whiskers can be seen as a skeleton in the matrix material due to its ability to transfer stress when crack initiation 20,24 . Moreover, the size of the whisker is between microns and nanometers, and it can be well dispersed in the matrix during ink extrusion 25 . Among all kinds of whiskers, SiC whisker (SiC w ) has superior tensile‐strength due to its monocrystalline structure 26 .…”