scholarly journals Influence of the size of walnut shell particulates on mechanical properties of epoxy-based composites

2021 ◽  
Author(s):  
Satish Kumar Shejkar ◽  
◽  
Basant Agrawal ◽  
Alok Agrawal ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Hardness Test ◽  
Mechanical Tests ◽  
Walnut Shell ◽  
Compressive Test ◽  
New Class ◽  
Appreciable Increase ◽  
Particulate Filler ◽  
Shell Powder

In the present work, a new class of polymer composite is developed using walnut shell powder (WSP) as particulate filler in the epoxy matrix. Three different sizes of WSP are used for preparing three different sets of composites. The particle size selected is 50-micron, 75-micron, and 100-micron. In each set of composites with different particle size, four compositions i.e., 5 wt. %, 10 wt. %, 15 wt. % and 20 wt. % of the WSP is fabricated. All prepared composites have undergone testing to study the behavior of the material under mechanical loading. The different mechanical tests performed are the tensile test, flexural test, compressive test and hardness test. From the experimentation, the inclusion of WSP appreciably alters the different mechanical properties of epoxy. With the increase in the content of filler, an appreciable increase in the value of hardness and compressive strength is observed. Though, it has been seen that the tensile strength and flexural strength of the material is compromised slightly when the content of WSP increases beyond a certain limit. Further, it is observed that composites fabricated with smaller size particles give improved mechanical properties as compared to their counterparts.

MECHANICAL PROPERTIES OF EPOXY RESIN BASED GRAPHENE NANO PARTICLES COMPOSITE

2020 ◽  
Vol 15 (4) ◽  
Author(s):  
Durgaprasad Kollipara ◽  
Prabhakar Gope VNB ◽  
Raja Loya
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Composite ◽  
Hardness Test ◽  
Industrial Applications ◽  
Mechanical Tests ◽  
Nano Particles ◽  
Potential Candidate ◽  
Matrix Composites ◽  
Reinforcing Material

Composites have tremendous applicability due to their excellent capabilities. The performance of composites mainly depends on the reinforcing material applied. A Graphene nanoparticle (GNP) is successful as an efficient reinforcing material due to its versatile as well as superior properties. Even at very low content, graphene can dramatically improve the properties of polymer and metal matrix composites. In this paper the effects of GNP on composites based on epoxy resin were analyzed. Different contents of GNP (0 – 4.5 vol. %) were added to the epoxy resin. The GNP/epoxy composite was fabricated under room temperature. Mechanical tests result such as tensile, flexural and hardness test show enhancements of the mechanical properties of the GNP/epoxy composite. The experimental results clearly show an improvement in Young’s modulus, tensile strength, and hardness as compared to pure epoxy. The results of this research are strong evidence for GNP/epoxy composites being a potential candidate for use in a variety of industrial applications, especially for automobile parts, aircraft components, and electronic parts such as super capacitors, transistors, etc.

scholarly journals SEM ANALYSIS AND STUDY OF MECHANICAL PROPERTIES OF UV AGED PVC/CORN COB COMPOSITES

2018 ◽  
Vol 6 (1) ◽  
pp. 347-353
Author(s):  
Krisztina Roman ◽  
Zita Szabo ◽  
Bence Szeman ◽  
Tamas Szabo
Keyword(s):  
Mechanical Properties ◽  
Hardness Test ◽  
Mechanical Tests ◽  
Sem Analysis ◽  
Corn Cob ◽  
Sem Micrographs ◽  
Analysis And Study

In this study, the aged mechanical properties and the modifier structure were determined. Bio-materials are often used as additives to plastics, in order to make the degradation easier in the environment. We examined the differences of the properties of samples differently aged; the ages of the samples were 1 and 3 years. The properties that were gathered from the mechanical tests, such as tensile-, flexural-, impact-, and hardness-test, show changes depending on the ages of the samples. Due to the aging, decrease of mechanical properties was experienced. The microcellular structures of the composites were studied by SEM analysis in order to understand the changes of the structures. It can be seen on the recording that the corn cob strengthens and sticks to the cells wall. The internal changes of the structure that were caused by the aging cannot be seen on the SEM micrographs.

scholarly journals Effects of Silicon Content and Tempering Temperature on the Microstructural Evolution and Mechanical Properties of HT-9 Steels

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 972 ◽  
Author(s):  
Junkai Liu ◽  
Wenbo Liu ◽  
Zhe Hao ◽  
Tiantian Shi ◽  
Long Kang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Microstructural Evolution ◽  
Charpy Impact ◽  
Hardness Test ◽  
Mechanical Tests ◽  
Fourth Generation ◽  
Martensitic Steels ◽  
Microscopic Mechanism ◽  
Tempering Temperature

Two kinds of experimental ferritic/martensitic steels (HT-9) with different Si contents were designed for the fourth-generation advanced nuclear reactor cladding material. The effects of Si content and tempering temperature on microstructural evolution and mechanical properties of these HT-9 steel were studied. The microstructure of experimental steels after quenching and tempering were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM); the mechanical properties were investigated by means of tensile test, Charpy impact test, and hardness test. The microscopic mechanism of how the microstructural evolution influences mechanical properties was also discussed. Both XRD and TEM results showed that no residual austenite was detected after heat treatment. The results of mechanical tests showed that the yield strength, tensile strength, and plasticity of the experimental steels with 0.42% (% in mass) Si are higher than that with 0.19% Si, whereas hardness and toughness did not change much; when tempered at 760 °C, the strength and hardness of the experimental steels decreased slightly compared with those tempered at 710 °C, whereas plasticity and toughness increased. Further analysis showed that after quenching at 1050 °C for 1 h and tempering at 760 °C for 1.5 h, the comprehensive mechanical properties of the 0.42% Si experimental steel are the best compared with other experimental steels.

scholarly journals Effect of Multiple Passes on Microstructural and Mechanical Properties of Surface Composite Al 2024/SiC Produced by Friction Stir Processing

2020 ◽  
Vol 44 (6) ◽  
pp. 421-426
Author(s):  
Ashish Kumar Srivastava ◽  
Nagendra Kumar Maurya ◽  
Manish Maurya ◽  
Shashi Prakash Dwivedi ◽  
Ambuj Saxena
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Friction Stir Processing ◽  
Hardness Test ◽  
Mechanical Tests ◽  
Matrix Composites ◽  
Application Range ◽  
Friction Stir ◽  
Morphological Aspects ◽  
Processed Sample

The application range in defense, aerospace and automotive sectors have enabled aluminium metal matrix composites to emerge in different technological fields due to enhanced micro structural and mechanical characteristics. In the present study, friction stir processing is used to fabricate Al2024/SiC composite with one, two and three passes of the cylindrical tool. Optical microscopy and scanning electronic microscope (SEM) were used to validate the processed sample and to justify the morphological aspects. Energy dispersive spectroscopy (EDS) analysis has also performed to confirm the presence of SiC particles in the composite. It also includes the analysis of mechanical properties such as tensile strength, Rockwell hardness test and nanoindentation to characterize the prepared samples. Improvement in tensile strength with a maximum of 443 MPa, the hardness of 121 HRB and nanoindentation of the specimen was depicted through the mechanical tests.

scholarly journals Impact of Particle Size on Performance of Selective Laser Sintering Walnut Shell/Co-PES Powder

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 448
Author(s):  
Yueqiang Yu ◽  
Minzheng Jiang ◽  
Suling Wang ◽  
Yanling Guo ◽  
Ting Jiang ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Particle Size ◽  
Powder Particle ◽  
Mechanical Test ◽  
Selective Laser Sintering ◽  
Particle Diameter ◽  
Laser Sintering ◽  
Walnut Shell ◽  
Powder Particle Size ◽  
Shell Powder

The agricultural and forestry waste walnut shell and copolyester hot-melt adhesives (Co-PES) powder were selected as feedstock. A kind of low-cost, low-power consumption, and environmentally friendly walnut shell/Co-PES powder composites (WSPC) was used for selective laser sintering (SLS). Though analyzing the size and morphology of walnut shell particle (≤550 μm) as well as performing an analysis of surface roughness, density, and mechanical test of WSPC parts with different particle sizes, results showed that the optimal mechanical performance (tensile strength of 2.011 MPa, bending strength of 3.5 MPa, impact strength of 0.718 KJ/m2) as walnut shell powder particle size was 80 to 120 μm. When walnut shell powder particle diameter was 120 to 180 μm, the minimum value of surface roughness of WSPC parts was 15.711 μm and density was approximately the maximum (0.926 g/cm3).

scholarly journals EFFECT OF TIC AND B4C ON MECHANICAL PROPERTIES OF AA7075 ALLOY FABRICATED BY POWDER METALLURGY

2018 ◽  
Vol 18 (2) ◽  
pp. 311-319
Author(s):  
Raad H Majid
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Compressive Strength ◽  
Powder Metallurgy ◽  
Mechanical Tests ◽  
Zinc Stearate ◽  
Matrix Composites ◽  
Physical Tests ◽  
Aluminum Metal Matrix Composites ◽  
Experimental Density

In this work, aluminum metal matrix composites (AMMCs) were fabricated by usingpowder metallurgy. AA7075 powder is reinforced with two different ceramic particles(TiC,B4C) with different weight fractions (2.5, 5, 7.5 and 10 wt.%). The composites wereproduced by powder metallurgy by preparing the powder, mixing, compacting andsintering. The particle size of unreinforced AA7075 about 100μm, while particle size ofeach TiC and B4C about 150 μm. The mixing process was done by planetary mixing setuprotating at 250 rpm for 2hr. by adding zinc stearate as an activator material with steel ballmilling. However the mixture was compacted by hydraulic uniaxial press type (LeyboldHarris No.36110) about 200 kg/cm² according to (ASTM-D 618). After compactingprocess, the mixture sintered at 475 °C for 2hr. by using electrical furnace with argonatmosphere.There are many examinations and tests were carried out for the synthesized compositesmaterial (AA7075/ TiC and AA7075/ B4C) such as examination of the microstructure,mechanical tests such as hardness and compressive strength, physical tests such asdensity and porosity.The results of this work showed that improving in physical properties (theoreticaldensity, experimental density, porosity) and mechanical properties (Rockwell hardnessand Compressive strength)

scholarly journals Effect of Epoxy/Al2O3/CeO2 Coating on Corrosion Rate and Mechanical Properties of Mild Steel

2018 ◽  
Vol 7 (4.35) ◽  
pp. 194 ◽  
Author(s):  
M.N. Nasih ◽  
W.V. Vicki
Keyword(s):  
Mechanical Properties ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Sea Water ◽  
Steel Specimen ◽  
Hardness Test ◽  
Mechanical Tests ◽  
Coating Material ◽  
Maintenance Cost ◽  
Ceo2 Coating

In any industry like a power station, corrosion is a natural process that commonly happens and one of the problems that need to be considered. The example is in the underground pipeline where sea water is transported for cooling purposes. This study mainly on corrosion rate and mechanical properties of coating material on mild steel. Theoretically, Metal can get the higher rate of corrosion when exposed to the surrounding environment. Corrosion can cause to a lot of unwanted conditions, including failures in functions and higher maintenance cost as well as it is too risky for safety. The objective of this project is to study the corrosion rate and mechanical properties of the coating material of pure epoxy, aluminum oxide (Al2O3) and cerium oxide (CeO2) on mild steel. Different composition of epoxy/ Al2O3/CeO2 coating tested on mild steel specimen. There is three experimental conduct which is a Gamry test for corrosion rate and impact and hardness test for mechanical tests. As a conclusion, the results from the tests show that the coated mild steel of Al2O3-CeO2-epoxy obtained the best value in term of corrosion resistance and mechanical properties.

scholarly journals Evaluation Microstructure and the Mechanical Properties of Composite Material for Al-Matrix Reinforced by Ceramic Materials (Sic And Al2O3)

2018 ◽  
Vol 24 (8) ◽  
pp. 19
Author(s):  
Lamyaa Kalel
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hardness Test ◽  
Ceramic Materials ◽  
Mechanical Tests ◽  
Strain Hardening Exponent ◽  
Matrix Composites ◽  
Before And After

In this investigation, the mechanical properties and microstructure of Metal Matrix Composites (MMCs) of Al.6061 alloy reinforced by ceramic materials SiC and Al2O3 with different additive percentages 2.5, 5, 7.5, and 10 wt.% for the particle size of 53 µm are studied. Metal matrix composites were prepared by stir casting using vortex technique and then treated thermally by solution heat treatment at 530 0C for 1 hr. and followed by aging at 175 0C with different periods. Mechanical tests were done for the samples before and after heat treatment, such as impact test, hardness test, and tensile test. Also, the microstructure of the metal matrix composites was examined by optical microscopy before and after heat treatment. The results of this work showed that precipitation of Mg2Si as a secondary phase and improvements in mechanical properties with increase in the percentage of SiC and Al2O3.  Also, the results of SiC revealed an improvement in mechanical properties more than for Al2O3 such as hardness, impact strength, yield strength, tensile strength, increasing the plasticity constant (k) and decreasing the strain hardening exponent (n).   

Sign in / Sign up

Export Citation Format

Share Document