Toward an efficient stress transfer with a fully connected hybrid network from epoxy, oxidized UHMWPE fibers, and silane surface modified silicon carbide nanoparticles

2020 ◽  
Author(s):  
Raouf Belgacemi ◽  
Mehdi Derradji ◽  
Djalal Trache ◽  
Abdeldjalil Zegaoui ◽  
Oussama Mehelli
Keyword(s):  
Silicon Carbide ◽  
Stress Transfer ◽  
Hybrid Network ◽  
Silicon Carbide Nanoparticles ◽  
Uhmwpe Fibers ◽  
Surface Modified ◽  
Fully Connected

Advanced hybrid materials from epoxy, oxidized UHMWPE fibers and silane surface modified silicon nitride nanoparticles

2020 ◽  
pp. 095400832096454
Author(s):  
Raouf Belgacemi ◽  
Mehdi Derradji ◽  
Djalal Trache ◽  
Abdeldjalil Zegaoui ◽  
Oussama Mehelli ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Hybrid Materials ◽  
Stress Transfer ◽  
Surface Modifications ◽  
Hybrid Network ◽  
Uhmwpe Fibers ◽  
Surface Modified ◽  
Fully Connected ◽  
Intended Use ◽  
Uhmwpe Composite

Aiming the development of highly performant polymer-based hybrid materials, the typical bisphenol-A based epoxy resin was reinforced with oxidized UHMWPE fibers and various amounts of silane surface modified silicon nitride (Si3N4) nanoparticles. The reinforcing phases underwent optimized surface modifications to create a fully connected network for an improved stress transfer between the constituents. The efficiency of the grafting methodology was confirmed by vibrational and morphological analyses. Meanwhile, the effects of the adopted modifications techniques on the mechanical properties were thoroughly discussed. Furthermore, static and dynamic mechanical investigations along with impact tests were conducted to study the effects of various amounts of Si3N4 nanoparticles on the overall performances of the epoxy/UHMWPE composite. The obtained results confirmed the great benefits from creating a fully connected hybrid network. The as such developed hybrids can be seen as promising materials for the intended use.

Development of highly performant hybrid materials based on phthalonitrile resin for a simultaneous ballistic and nuclear shielding protection

2020 ◽  
pp. 095400832095452
Author(s):  
Oussama Mehelli ◽  
Mehdi Derradji ◽  
Raouf Belgacemi ◽  
Abdeldjalil Zegaoui ◽  
Kamel Khimeche ◽  
...  
Keyword(s):  
High Performance ◽  
Stress Transfer ◽  
Continuous Phase ◽  
Hybrid Network ◽  
Thick Sample ◽  
National Institute Of Justice ◽  
Nuclear Shielding ◽  
Discontinuous Phase ◽  
Fully Connected ◽  
First Time

In this study, a new high-performance hybrid material was designed targeting an efficient ballistic and nuclear shielding protection. To achieve this goal, a typical highly performant thermosetting resin, namely the phthalonitrile (PN) resin, was reinforced with Kevlar fibers (KF-29), as continuous phase, and erbium oxide (Er2O3) nanoparticles, as discontinuous phase. The reinforcing phases underwent a silane surface modification to create a fully connected network aiming an improved stress transfer between the constituents. The mechanical investigations through tensile and bending testing confirmed the positive effect of the addition of an increasing amount (up to 20 wt%) of the Er2O3 nanoparticles. The hybrids also provided excellent gamma rays shielding performances with a screening ratio of about 33% for a 3 cm thick sample. In the meantime, the ballistic tests evaluated under the National Institute of Justice standard (NIJ standard-0101.06-IIA) also highlighted an improved kinetic energy absorption following the increase in the amounts of the discontinuous phase. Overall, this study unraveled for the first time ever the benefits obtained from a fully connected hybrid network in the field of ballistic and radiation protection.

scholarly journals Direct Observation of Transition from Solid-State to Molecular-Like Optical Properties in Ultrasmall Silicon Carbide Nanoparticles

2018 ◽  
Vol 122 (46) ◽  
pp. 26713-26721 ◽  
Author(s):  
David Beke ◽  
Anna Fučíková ◽  
Tibor Z. Jánosi ◽  
Gyula Károlyházy ◽  
Bálint Somogyi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Optical Properties ◽  
Solid State ◽  
Direct Observation ◽  
Silicon Carbide Nanoparticles

scholarly journals Синтез наночастиц карбида кремния методом лазерного пиролиза смеси моносилана и ацетилена

2020 ◽  
Vol 54 (11) ◽  
pp. 1233
Author(s):  
И.А. Ершов ◽  
Л.Д. Исхакова ◽  
В.И. Красовский ◽  
Ф.О. Милович ◽  
С.И. Расмагин ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Gas Phase ◽  
Reaction Zone ◽  
Phase Reaction ◽  
Synthesis Reaction ◽  
Flow Ratio ◽  
Laser Synthesis ◽  
Gas Phase Reaction ◽  
Silicon Carbide Nanoparticles ◽  
Sic Particles

The conditions of the laser-enhanced synthesis reaction of silicon carbide nanoparticles are determined and the nanoparticles are characterized. The gas-phase reaction of laser synthesis of SiC particles is observed at SiH4/C2H2 flow ratio in the range of 1.6-3.2. The temperature in the reaction zone was ~1400--1500ºC. Silicon carbide nanoparticles ~6 nm in diameter are produced and their composition is studied.

Silicon Carbide Effect as Reinforcement on Aluminium Metal Matrix Composite

2019 ◽  
Vol 41 (4) ◽  
pp. 650-650
Author(s):  
Ali Dad Chandio Ali Dad Chandio ◽  
Muhammad Basit Ansari Muhammad Basit Ansari ◽  
Shahid Hussain Shahid Hussain ◽  
Muhammad Ali Siddiqui Muhammad Ali Siddiqui
Keyword(s):  
Silicon Carbide ◽  
Stress Transfer ◽  
Stir Casting ◽  
Powder Metallurgy Method ◽  
Casting Method ◽  
Morphological Evaluation ◽  
Sic Particulates ◽  
Dislocation Strengthening ◽  
Sic Composites ◽  
Aluminium Metal

In the present study aluminium silicon carbide (Al/SiC) composites were prepared by powder metallurgical method. The mechanical and morphological evaluation were studied upon the variation of reinforcements percentages i.e.10, 15 and 20 wt.% of SiC powder were used as the reinforcements in aluminium matrix. The comparison of powder metallurgy method with stir casting method of Al/ (SiC) composites preparation was performed and the particle reinforcements were visualized through Scanning Electron Microscopy (SEM). The results demonstrated increased hardness with increasing wt. % of SiC particles. This was attributed to efficient stress transfer and dislocation strengthening. In addition, the densification behaviour of the composites was also studied and SiC particulates were found to exhibit profound effect on composites density.

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