This work aims to develop and characterize a hybrid composite material with two particles of the same size. As reinforcing particles, the hulls of palm nuts and coconut are chosen. Hybrid composite material composites...This work aims to develop and characterize a hybrid composite material with two particles of the same size. As reinforcing particles, the hulls of palm nuts and coconut are chosen. Hybrid composite material composites in the form of specimens were produced by molding at 10%, 20% and 30% mass fractions in various sizes (0.63<span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm, 1.25</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm and 2.5</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm). The samples were physically characterized (water absorption rate, moisture content, actual, theoretical and apparent density) and mechanical in 3-point flexion. The main results are: the highest and minimum water absorption rate are respectively 3.57% and 0.67% for respectively particle sizes 1.25</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (sample P10C30) and 0.67% in the size of 0.63</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (sample P10C10). The moisture content varies from 0.64 to 7.14% respectively for the P20C20 (2.5 mm) and P10C30 (2.5 mm) samples. The maximum and minimum real density are 1340,518</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> and 1055.981</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;">, for respectively the composites of particles sizes 1.25</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (P20C10) and 0.63</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">mm (sample P20C20). The minimum real density is Its </span><span><span style="font-family:Verdana;">maximum theoretical density is 1194.949 Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> (for samples P20C10,</span></span><span style="font-family:Verdana;"> P10C10 and P30C10);however, the minimum is 1189.966 Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> (P10C20 and P20C20). The bulk density varies from 933.28</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> to 1176.1</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;">, respectively, in sizes from 2.5</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (P10C30) to 0.63</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">mm (for P10C30). As for the mechanical characteristics, the Modulus of Elasticity (MOE) varies from 25.664 GPa to 25.759 GPa, respectively, the samples P10C10 (1.25 mm) and P10C20 (2.5 mm). The MOE values describe a parabola whose peak is reached when the palm shell loads are 20%, that is to say P20C10, whatever the particle size distribution. In resilience, samples with small particles are more resilient with a maximum value of 22.49 J/cm</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> and a minimum value of 4.45 J/cm</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> to verify the principles of Hall-Petch’s law.</span></span>展开更多
文摘This work aims to develop and characterize a hybrid composite material with two particles of the same size. As reinforcing particles, the hulls of palm nuts and coconut are chosen. Hybrid composite material composites in the form of specimens were produced by molding at 10%, 20% and 30% mass fractions in various sizes (0.63<span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm, 1.25</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm and 2.5</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm). The samples were physically characterized (water absorption rate, moisture content, actual, theoretical and apparent density) and mechanical in 3-point flexion. The main results are: the highest and minimum water absorption rate are respectively 3.57% and 0.67% for respectively particle sizes 1.25</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (sample P10C30) and 0.67% in the size of 0.63</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (sample P10C10). The moisture content varies from 0.64 to 7.14% respectively for the P20C20 (2.5 mm) and P10C30 (2.5 mm) samples. The maximum and minimum real density are 1340,518</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> and 1055.981</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;">, for respectively the composites of particles sizes 1.25</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (P20C10) and 0.63</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">mm (sample P20C20). The minimum real density is Its </span><span><span style="font-family:Verdana;">maximum theoretical density is 1194.949 Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> (for samples P20C10,</span></span><span style="font-family:Verdana;"> P10C10 and P30C10);however, the minimum is 1189.966 Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> (P10C20 and P20C20). The bulk density varies from 933.28</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;"> to 1176.1</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Kg/m</span><sup><span style="font-family:Verdana;">3</span></sup><span style="font-family:Verdana;">, respectively, in sizes from 2.5</span></span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">mm (P10C30) to 0.63</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">mm (for P10C30). As for the mechanical characteristics, the Modulus of Elasticity (MOE) varies from 25.664 GPa to 25.759 GPa, respectively, the samples P10C10 (1.25 mm) and P10C20 (2.5 mm). The MOE values describe a parabola whose peak is reached when the palm shell loads are 20%, that is to say P20C10, whatever the particle size distribution. In resilience, samples with small particles are more resilient with a maximum value of 22.49 J/cm</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> and a minimum value of 4.45 J/cm</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> to verify the principles of Hall-Petch’s law.</span></span>
