Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materials
A functionally graded material (FGM) was prepared using epoxy resin reinforced with silicon dioxide with a particle size of 100 μm and weight percentages of 0, 20, 40, 60, and 80 wt%. In a gravity-molding process using the hand layup technique, specimens with international standard (ASTM)-calculated...
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AIMS Press
2023-01-01
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| Series: | AIMS Materials Science |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/matersci.2023010?viewType=HTML |
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| author | Jaafar Sh. AbdulRazaq Abdul Kareem F. Hassan Nuha H. Jasim |
| author_facet | Jaafar Sh. AbdulRazaq Abdul Kareem F. Hassan Nuha H. Jasim |
| author_sort | Jaafar Sh. AbdulRazaq |
| collection | DOAJ |
| description | A functionally graded material (FGM) was prepared using epoxy resin reinforced with silicon dioxide with a particle size of 100 μm and weight percentages of 0, 20, 40, 60, and 80 wt%. In a gravity-molding process using the hand layup technique, specimens with international standard (ASTM)-calculated dimensions were created in a mold of poly(methyl methacrylate), which is also known as acrylic. Tensile, flexural, impact, infrared wave, and thermal conductivity tests, and X-ray diffraction (XRD) were conducted on specimens of the five layers of the FGM. The XRD and infrared spectroscopy demonstrated that the compositions of the silica particles and epoxy had a strong association with their physical structures. The findings of experimental tests indicated that increasing the ratio of silicon dioxide enhanced the mechanical properties, and the increase in modulus of elasticity was directly related to the weight percentage of the reinforcement material. The composite with 80% silica had a 526.88% higher modulus of elasticity than the pure epoxy specimen. Both tensile and flexural strengths of the composite material were maximal when 40 wt% of the particle silicon dioxide was utilized, which were 68.5% and 67.8% higher than those of the neat epoxy, respectively. The test results also revealed that the impact resistance of the FGM increased when the silica proportion increased, with a maximum value of 60 wt% silica particle content, which was an increase of 76.98% compared to pure epoxy. In addition, the thermal properties of epoxy resin improved when SiO<sub>2</sub> was added to the mixture. Thus, the addition of silica filler to composite materials directly proportionally increased their thermal conductivity to the weight ratio of the reinforcement material, which was 32.68–383.66%. FGM composed of up to 80% silica particles had the highest thermal conductivity. |
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| format | Article |
| id | doaj.art-3237d4ae797e48a89f3082a72bb2a4f1 |
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| language | English |
| last_indexed | 2024-03-13T09:31:12Z |
| publishDate | 2023-01-01 |
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| series | AIMS Materials Science |
| spelling | doaj.art-3237d4ae797e48a89f3082a72bb2a4f12023-05-26T01:23:40ZengAIMS PressAIMS Materials Science2372-04842023-01-0110118219910.3934/matersci.2023010Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materialsJaafar Sh. AbdulRazaq 0Abdul Kareem F. Hassan1Nuha H. Jasim21. Department of Mechanical Engineering, College of Engineering, University of Basrah, Basrah, Iraq1. Department of Mechanical Engineering, College of Engineering, University of Basrah, Basrah, Iraq2. Department of Materials Engineering, College of Engineering, University of Basrah, Basrah, IraqA functionally graded material (FGM) was prepared using epoxy resin reinforced with silicon dioxide with a particle size of 100 μm and weight percentages of 0, 20, 40, 60, and 80 wt%. In a gravity-molding process using the hand layup technique, specimens with international standard (ASTM)-calculated dimensions were created in a mold of poly(methyl methacrylate), which is also known as acrylic. Tensile, flexural, impact, infrared wave, and thermal conductivity tests, and X-ray diffraction (XRD) were conducted on specimens of the five layers of the FGM. The XRD and infrared spectroscopy demonstrated that the compositions of the silica particles and epoxy had a strong association with their physical structures. The findings of experimental tests indicated that increasing the ratio of silicon dioxide enhanced the mechanical properties, and the increase in modulus of elasticity was directly related to the weight percentage of the reinforcement material. The composite with 80% silica had a 526.88% higher modulus of elasticity than the pure epoxy specimen. Both tensile and flexural strengths of the composite material were maximal when 40 wt% of the particle silicon dioxide was utilized, which were 68.5% and 67.8% higher than those of the neat epoxy, respectively. The test results also revealed that the impact resistance of the FGM increased when the silica proportion increased, with a maximum value of 60 wt% silica particle content, which was an increase of 76.98% compared to pure epoxy. In addition, the thermal properties of epoxy resin improved when SiO<sub>2</sub> was added to the mixture. Thus, the addition of silica filler to composite materials directly proportionally increased their thermal conductivity to the weight ratio of the reinforcement material, which was 32.68–383.66%. FGM composed of up to 80% silica particles had the highest thermal conductivity.https://www.aimspress.com/article/doi/10.3934/matersci.2023010?viewType=HTMLfgmcompositesepoxysilicamechanical propertiesthermal conductivity |
| spellingShingle | Jaafar Sh. AbdulRazaq Abdul Kareem F. Hassan Nuha H. Jasim Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materials AIMS Materials Science fgm composites epoxy silica mechanical properties thermal conductivity |
| title | Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materials |
| title_full | Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materials |
| title_fullStr | Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materials |
| title_full_unstemmed | Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materials |
| title_short | Characterization of the mechanical properties and thermal conductivity of epoxy-silica functionally graded materials |
| title_sort | characterization of the mechanical properties and thermal conductivity of epoxy silica functionally graded materials |
| topic | fgm composites epoxy silica mechanical properties thermal conductivity |
| url | https://www.aimspress.com/article/doi/10.3934/matersci.2023010?viewType=HTML |
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