Thermal Conductivity of Composites of Beryllia and Lithium Titanate

Rath, B.N.; Ghanwat, S. J.; Kaity, Santu; Danani, Chandan; Kulkarni, Rahul; Alur, V.D.; Sathiyamoorthy, D.; Anantharaman, S

doi:10.1007/s11665-013-0606-z

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…For the thermal expansion coefficient the following Table 2 summarize the results while the figures 10:11 show the curves of this tests. It was expected that the results will be in a negative values for the phenolic based matrix composites [23,24], while the composites with epoxy based matrix will be in a positive value. For the materials cured with the phenol the CTE values are negative as expected and published before, but when tracing the behavior of the composites we notice that the material (fiber) tends to expands while the phenol tends to retract at the range of temperature up to 300-400 °c, after that the matrix (phenol) overcome the fiber and retract to a lower limits.…”

Section: Results Of Ctementioning

confidence: 99%

Experimental Determination of Thermal Properties of Chopped Fiber Composite Materials

Saif¹,

Kamal²,

Kamal³

et al. 2016

The International Conference on Applied Mechanics and Mechanica

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Thermal properties of chopped composites are important parameters for determining application and use of this category of materials. An experimental identification for thermal properties of different composite materials was conducted. In order to investigate the effect of fiber, three different chopped fibers with a phenol resin as a matrix; Carbon fiber, Basalt, and Fiberglass, were selected to determine their thermal properties. Also, the matrix is changed for carbon fiber; phenol resin and epoxy resin, to show the influence of matrix material. Two important parameters were investigated which are the thermal conductivity (TC) and the thermal expansion coefficient (CTE). For the four materials, the thermal conductivity obtained is very low with a range of K = 0.159 w/m °c for the Carbon / Phenol to K = 0.1942 w/m °c for the Carbon / Epoxy, so those materials are used as thermal insulators. On the other side, thermal expansion coefficient has also very low negative values for the Phenol based composites with a range of -146.6 µm/m°c for fiber glass / phenol to -273.7 µm/m°c for carbon fiber / phenol, and for the Epoxy based composites the CTE has a low positive value which is 1049 µm/m°c for carbon fiber / epoxy .

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Section: Results Of Ctementioning

confidence: 99%

Experimental Determination of Thermal Properties of Chopped Fiber Composite Materials

Saif¹,

Kamal²,

Kamal³

et al. 2016

The International Conference on Applied Mechanics and Mechanica

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“…10 shows the curves of these tests. It was expected that the results will be in a negative values for the phenolic based matrix composites [22,23].…”

Section: Measured Data For Ctementioning

confidence: 99%

Experimental Verification of Composite Material With Chopped Fiber Glass in Phenol as a Rocket Nozzle Insulation

Seif

Kamal

Shoukry

et al. 2018

The International Conference on Applied Mechanics and Mechanica

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This work deals with the characterization of chopped fiber glass composite. The resin matrix was a phenol base. Sheets of this composite have been cured and cut to make sample specimens for testing. Four mechanical testing have been conducted for these material including tensile test at different temperatures, bending test, compression test and hardness test. Three thermal tests including thermal conductivity determination, thermal expansion coefficient determination and ablation test have been conducted. The results show that this material has very good thermal properties capable of resisting high temperatures.A nozzle for rocket motor has been made from this material as insulators, and static firing test has been conducted and the temperatures inside this composite material have been measured. Investigation of the thermal loads response of composite nozzle has been done using FE using ANSYS package software and the calculated temperatures have been recorded from the same places that chosen in the real firing test. By comparing the measured and obtained temperature for the fiber glass, there is a great agreement between them. The selected composite material resists the high temperatures so this used as thermal protective material.

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“…The hybrid filler system plays an important role in the nature of the interface and the formation of thermally conductive paths in a composite [ 14 ]. Therefore, various ceramic fillers have been used in the hybrid filler system on the polymer matrix for enhancing the thermal conductivity and thermal properties of the composites, such as boron nitride (BN), aluminum nitride (AlN), silicon nitride (Si 3 N 4 ) [ 15 , 16 , 17 ], aluminum oxide (Al 2 O 3 ), zinc oxide (ZnO), and beryllium oxide (BeO) [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Grafting Reaction of Aluminum Nitride on the Multi-Walled Carbon Nanotubes on the Thermal Properties of the Poly(phenylene sulfide) Composites

Kim

Park

2017

Polymers

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Abstract:In this study, the PPS/MWCNTs/AlN composite was prepared with poly(phenylene sulfide) (PPS), covalent functionalized multi-walled carbon nanotubes (fMWCNTs), and aluminum nitride (AlN) via melt-blending techniques. The AlN is a fascinating non-oxidizing ceramic material having the highest thermal conductivity among the ceramic materials. In order to introduce the functional groups on the surface of the AlN particles, a silane coupling agent was used as it is able to graft with the functional groups on the covalent functionalized MWCNTs. The silanization reaction of the AlN was confirmed qualitatively and quantitatively by FT-IR (Fourier Transform Infrared Spectroscopy), and XPS (X-ray Photoelectron Spectroscopy). The grafting reaction of the AlN particles on the MWCNTs was confirmed using UV-Vis (Ultraviolet-Visible Spectroscopy), FE-SEM (Field-Emission Scanning Electron Microscopy) and FE-TEM (Field-Emission Transmission Electron Microscopy) images. The grafting reaction was accomplished by observing the change of the transmittance, the morphology of the AlN particle bonded to the MWCNTs. For the morphological changes of the fractured surface of the PPS/MWCNTs/AlN composites by FE-SEM, the hybrid filler was homogeneously dispersed on the PPS matrix when the AlN particle was grafted on the MWCNTs. The homogeneous distribution of the hybrid filler acts as a heat transfer path, which led the higher thermal properties, such as thermal conductivity, thermal resistance, and melting temperature than those of not grafted MWCNTs.

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Thermal Conductivity of Composites of Beryllia and Lithium Titanate

Cited by 6 publications

References 7 publications

Experimental Determination of Thermal Properties of Chopped Fiber Composite Materials

Experimental Determination of Thermal Properties of Chopped Fiber Composite Materials

Experimental Verification of Composite Material With Chopped Fiber Glass in Phenol as a Rocket Nozzle Insulation

Effect of the Grafting Reaction of Aluminum Nitride on the Multi-Walled Carbon Nanotubes on the Thermal Properties of the Poly(phenylene sulfide) Composites

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