Thermal and Flame Retardant Behavior of Neem and Banyan Fibers When Reinforced with a Bran Particulate Epoxy Hybrid Composite

Awareness of environmental concerns influences researchers to develop an alternative method of developing natural fiber composite materials, to reduce the consumption of synthetic fibers. This research attempted testing the neem (Azadirachta indica) fiber and the banyan (Ficus benghalensis) fiber at different weight fractions, under flame retardant and thermal testing, in the interest of manufacturing efficient products and parts in real-time applications. The hybrid composite consists of 25% fiber reinforcement, 70% matrix material, and 5% bran filler. Their thermal properties—short-term heat deflection, temperature, thermal conductivity, and thermal expansion—were used to quantify the effect of potential epoxy composites. Although natural composite materials are widely utilized, their uses are limited since many of them are combustible. As a result, there has been a lot of focus on making them flame resistant. The thermal analysis revealed the sample B was given 26% more short-term heat resistance when the presence of banyan fiber loading is maximum. The maximum heat deflection temperature occurred in sample A (104.5 °C) and sample B (99.2 °C), which shows a 36% greater thermal expansion compared with chopped neem fiber loading. In sample F, an increased chopped neem fiber weight fraction gave a 40% higher thermal conductivity, when compared to increasing the bidirectional banyan mat of this hybrid composite. The maximum flame retardant capacity occurred in samples A and B, with endurance up to 12.9 and 11.8 min during the flame test of the hybrid composites.

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Friction and Wearing Behaviour of Sintered Composites Made from Copper Mixed with Carbon Fibers

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.660.81 ◽

2015 ◽

Vol 660 ◽

pp. 81-85 ◽

Cited By ~ 1

Author(s):

Radu Caliman

Keyword(s):

Thermal Conductivity ◽

Thermal Expansion ◽

Composite Materials ◽

Friction Coefficient ◽

Carbon Fiber ◽

Carbon Fibers ◽

Coefficient Of Thermal Expansion ◽

Density Ratio ◽

Point Of View ◽

Short Carbon

This paper presents a study regarding friction and wear comportment of sintered composite materials obtained by mixture of copper with short carbon fibers. Sintered composites are gaining importance because the reinforcement serves to reduce the coefficient of thermal expansion and increase the strength and modulus. In case of composites form by carbon fiber and copper, the thermal conductivity can also be enhanced. The combination of low thermal expansion and high thermal conductivity makes them very attractive for electronic packaging. Besides good thermal properties, their low density makes them particularly desirable for aerospace electronics and orbiting space structures. Compared to the metal itself, a carbon fiber-copper composite is characterized by a higher strength-to-density ratio, a higher modulus-to-density ratio, better fatigue resistance, better high-temperature mechanical properties and better wear resistance. Varying the percentage of short carbon fibers from 7,8% to 2,4%, and the percentage of copper from 92,2% to 97,6%, five dissimilar composite materials have been made and tested from the wear point of view. Friction tests are carried out, at room temperature, in dry conditions, on a pin-on-disc machine. The friction coefficient was measured using abrasive discs made from steel 4340 having the average hardness of 40 HRC, and sliding velocity of 0,6 m/sec. The primary goal of this study work it was to distinguish a mixture of materials with enhanced friction and wearing behaviour. The load applied on the specimen during the tests, is playing a very important role regarding friction coefficient and also the wearing speed.

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Thermal Properties Characterization of Glass Fiber Hybrid Polymer Composite Materials

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.34.19359 ◽

2018 ◽

Vol 7 (3.34) ◽

pp. 455 ◽

Cited By ~ 1

Author(s):

Gurushanth B Vaggar ◽

S C Kamate ◽

Pramod V Badyankal

Keyword(s):

Thermal Conductivity ◽

Composite Material ◽

Composite Materials ◽

Hybrid Composite ◽

Gravimetric Analysis ◽

Thermal Gravimetric ◽

Hybrid Polymer ◽

Hybrid Composite Material ◽

Hybrid Polymer Composite

In the current work characterization of thermal properties are find out to the prepared specimens of silicon filler hybrid composite materials (silicon filler glass – fiber chop strand). The specimens were prepared by hand layup followed by compression molding machine by non-heating molding technique. Thermal conductivity (K), Coefficient thermal expansion (CTE) and Thermal gravimetric analysis (TGA) are found by composite slab method and by thermal muffler oven in a laboratory. The guard heater is used to supply heat which is measured by voltmeter and ammeter. Thermocouples are placed between the interface of the copper plates and the specimen of silicon filled hybrid polymer composite material (HPC), to read the temperatures. By the experimental readings it is found that the K of silicon filler hybrid composite material directly proportional to the % of silicon fillers for the different trails. The CTE inversely varies with % of silicon fillers and in thermal gravimetric analysis the failure of material takes place at 300°C for a time of 20 minutes and also reduction in mass of silicon inserted hybrid composite material. From the results it has been concluded that the considerable enhance in thermal conductivity with negligible decrease in CTE and increase in thermal resistivity of hybrid composite materials.

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On the thermal expansion of composite materials and cross-property connection between thermal expansion and thermal conductivity

Mechanics of Materials ◽

10.1016/j.mechmat.2011.10.001 ◽

2012 ◽

Vol 45 ◽

pp. 20-33 ◽

Cited By ~ 26

Author(s):

Igor Sevostianov

Keyword(s):

Thermal Conductivity ◽

Thermal Expansion ◽

Composite Materials

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The Thermal Conductivity and Thermal Expansion of Non-Metallic Composite Materials at Low Temperatures

Nonmetallic Materials and Composites at Low Temperatures ◽

10.1007/978-1-4613-3365-4_13 ◽

1982 ◽

pp. 181-195 ◽

Cited By ~ 2

Author(s):

H M Rosenberg

Keyword(s):

Thermal Conductivity ◽

Thermal Expansion ◽

Composite Materials ◽

Low Temperatures ◽

Metallic Composite

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Thermal analysis of Kevlar/basalt reinforced hybrid polymer composite

Materials Research Express ◽

10.1088/2053-1591/ac3aa6 ◽

2021 ◽

Author(s):

V Ramesh ◽

P Anand

Keyword(s):

Thermal Expansion ◽

Thermal Properties ◽

Composite Materials ◽

Hybrid Composite ◽

Hybrid Composites ◽

Thermo Gravimetric Analysis ◽

Linear Thermal Expansion ◽

Thermal Conductance ◽

Mechanical And Thermal Properties ◽

Gravimetric Analysis

Abstract Use of lightweight composite materials in automobile applications such as doors, bonnets, and bumpers and also the utilization of composite materials in building insulations require superior mechanical and thermal properties. This study attempts to determine the thermal conductivity, linear thermal expansion coefficient, heat deflection temperature and thermo gravimetric analysis of hybrid composite containing reinforcement fibers stacked in seven different combinations in an epoxy matrix as per ASTM standards. Each composite contained two different fibre materials, i.e., Kevlar and basalt. The study revealed that the stacked layers of basalt fibers had more influence on the thermal properties. It was observed that the hybrid composite made of least quantity layers of Kevlar and most of basalt exhibited the maximum thermal conductance of 0.219W/mK, while with vice versa laminate developed 0.191W/mK which was least thermal conductance. The composition prepared by made Kevlar as core layer and basalt as its outer layers exhibited coefficient of linear thermal expansion above 11.5x10-6/oC. Maximum decomposition weight loss of 76.92% occurred in the composition prepared by keeping basalt as core and Kevlar as outer layer. The differential thermal graph showed that the said hybrid composite exhibited the peak decomposition rate of 1wt.%/oC. The thermal properties of the laminate prepared by keeping two layers of Kevlar sandwiched between the basalt were excellent when compared to other six hybrid composites investigated in this study.

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Effect of Viscosity Modifying Agent on the Performance of Hybrid Bio-Based Concrete

10.4028/www.scientific.net/cta.1.491 ◽

2022 ◽

Author(s):

Mohammed Sonebi ◽

P. Thiele ◽

A. Abdalqader ◽

Leonid I. Dvorkin ◽

Nataliya Lushnikova ◽

...

Keyword(s):

Thermal Conductivity ◽

Experimental Investigation ◽

Composite Materials ◽

Water Absorption ◽

Hybrid Composite ◽

Mechanical Performance ◽

Capillary Absorption ◽

Modifying Agent ◽

Coefficient Of Thermal Conductivity ◽

Hybrid Composite Material

An experimental investigation was conducted in order to study the water absorption, mechanical performance, thermal properties and durability of hybrid hemp-rapeseed composite materials. The hybrid composite material is made with 50% hemp shives and 50% rapeseed fibres. The purpose of this study is to investigate the influence of the incorporation of viscosity modifying agent (VMA) on hybrid concrete. Four mixes were made for: shuttered walls and roof insulation with and without VMA. The water absorption of the hybrid composite fibres was, first, measured. The compressive strengths of these mixes at 7 and 28 d were then determined in order to compare the mechanical behaviour of the hybrid composite materials made with VMA. In addition, the capillary absorption and coefficient of thermal conductivity were also measured. The results revealed that VMA improved the performance of the hybrid concrete.

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Thermal expansion behavior of Al/CFRP multi-layered hybrid composite materials.

Journal of the Society of Materials Science Japan ◽

10.2472/jsms.36.624 ◽

1987 ◽

Vol 36 (405) ◽

pp. 624-629 ◽

Cited By ~ 1

Author(s):

Osamu HAGA ◽

Minoru KIMURA

Keyword(s):

Thermal Expansion ◽

Composite Materials ◽

Hybrid Composite ◽

Thermal Expansion Behavior ◽

Expansion Behavior

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Processing and Thermal Properties of Cu-AlN Composites

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.65.100 ◽

2010 ◽

Vol 65 ◽

pp. 100-105 ◽

Cited By ~ 1

Author(s):

Marcin Chmielewski ◽

Katarzyna Pietrzak ◽

Dariusz Kaliński ◽

Agata Strojny

Keyword(s):

Heat Transfer ◽

Thermal Conductivity ◽

Thermal Expansion ◽

Composite Materials ◽

Coefficient Of Thermal Expansion ◽

Processing Parameters ◽

Process Conditions ◽

Pressing Method ◽

Materials Used ◽

Effective Transfer

Heat transfer by conduction is involved in the use of heat sinks dissipitating heat from electronic devices. Effective transfer of heat requires using materials of high thermal conductivity. In addition, it requires appropriate values of thermal expansion, matched to the semiconductor materials, high purity of materials used and good contact between bonded elements across which heat transfer occurs. The conventional materials are not able to fulfil still raising and complex requirements. The solutions of this problem could be using the composites materials, where the combinations of different properties is possible to use. This study presents the technological tests and the analysis of correlation between processing parameters and the properties of copperaluminium nitride composites. Composite materials were obtained by mixing in planetary ball mill and then densified using the sintering under pressure or hot pressing method. The microstructure of obtained composite materials using optical microscopy and scanning electron microscopy were analyzed. Coefficient of thermal expansion (CTE) and thermal conductivity (TC) were investigated depending on the process conditions.

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