Electron field emission from Q-carbon

Haque, Ariful; Narayan, J.

doi:10.1016/j.diamond.2018.04.008

Cited by 41 publications

(42 citation statements)

References 46 publications

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“…It was found that the CS94 model describes the experimental data better. This observation might be further examined at high temperatures (e.g., T > 1500 K) using some novel experimental techniques, such as the pulsed laser annealing technique with superfast T -quenching capability [ 56 , 57 ].…”

Section: Discussionmentioning

confidence: 99%

Thermodynamics of Mg–Al Order-Disorder Reaction in MgAl2O4-Spinel: Constrained by Prolonged Annealing Experiments at 773–1123 K

Bao

Liu

2021

Molecules

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MgAl2O4-spinel has wide industrial and geological applications due to its special structural and physical–chemical features. It is presumably the most important endmember of complex natural spinel solid solutions, and therefore provides a structural model for a large group of minerals with the spinel structure. There exists a well known but still inadequately understood phenomenon in the structure of MgAl2O4-spinel, the Mg–Al cations readily exchanging their positions in response to variations of temperature, pressure, and composition. A large number of experiments were performed to investigate the Mg–Al cation order-disorder process usually quantified by the inversion parameter x (representing either the molar fraction of Al on the tetrahedral T-sites or the molar fraction of Mg on the octahedral M-sites in the spinel structure), and some thermodynamic models were thereby constructed to describe the x-T relation. However, experimental data at some key T were absent, so that the different performance of these thermodynamic models could not be carefully evaluated. This limited the interpolation and extrapolation of the thermodynamic models. By performing some prolonged annealing experiments with some almost pure natural MgAl2O4-spinel plates and quantifying the x values with single-crystal X-ray diffraction technique, we obtained some critical equilibrium x values at T down to 773 K. These new x-T data, along with those relatively reliable x values at relatively high T from early studies, clearly indicate that the CS94 Model (a model constructed by Carpenter and Salje in 1994) better describes the Mg–Al cation order-disorder reaction in MgAl2O4-spinel for a wide range of T. On the basis of the CS94 Model, a geothermometer was established, and its form is T-closure = 21362 × x3 − 12143 × x2 + 6401 × x − 10 (T-closure standing for the closure temperature of the Mg–Al cation exchange reaction). This geothermometer can be used to constrain the thermal history of the geological bodies containing MgAl2O4-spinel.

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Section: Discussionmentioning

confidence: 99%

Thermodynamics of Mg–Al Order-Disorder Reaction in MgAl2O4-Spinel: Constrained by Prolonged Annealing Experiments at 773–1123 K

Bao

Liu

2021

Molecules

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“…During the laser annealing process, the as-deposited films were melted in a super-undercooled state and subsequently quenched within 200-250 nanoseconds. 40,41 The single crystal, sapphire template helped to grow epitaxial single crystal c-BN structures via domain matching epitaxy.…”

Section: Methodsmentioning

confidence: 99%

Conversion of h-BN into c-BN for tuning optoelectronic properties

Haque

Narayan

2020

Mater. Adv.

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“…8 Many studies on the electrical conductivity of the resin with nanocomposites, for examples, carbon nanotubes (CNTs), carbon black, graphene and Q-carbon, have been reported. [9][10][11][12][13] Another approach to incorporate electrical conductivity into composites is to use conductive polymers. One of the polymers that is being studied widely is polyaniline (PANI).…”

Section: Introductionmentioning

confidence: 99%

Electrically conductive carbon fiber layers as lightning strike protection for non-conductive epoxy-based CFRP substrate

Manomaisantiphap

Kumar

Okada

et al. 2020

Journal of Composite Materials

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A large amount of electrically conductive fillers is needed to enhance a Carbon Fiber Reinforced Plastics (CFRP) electrical conductivity enough to withstand lightning strikes of peak currents. However, such large alien constituents hamper the inherent good mechanical properties of CFRP structures. In this work, a solution has been proposed to retain both desired properties in a CFRP laminate. Layer-wise hybrid laminate has been demonstrated as a solution for lightning strike protection of Carbon Fiber Reinforced Plastics (CFRP). Top few layers of a hybrid laminate are prepared using electrically conductive polymer-based resin (CF/C-POLY) to provide effective dissipation of lightning current while epoxy-based CFRP substrate (CF/Epoxy) provides the main structural strength. An insulating adhesive layer is used to bond CF/C-POLY and CF/Epoxy to prepare the laminate. The hybrid laminates were tested for their effectiveness against lightning strikes. Laminates were struck by modified lightning waveform of component A with peak current of -14 kA and -40 kA. The performance of the laminates against lightning strike were evaluated using high speed camera, high-speed and thermal camera. It is found that CF/C-POLY layer successfully defended the main structural component i.e. CF/Epoxy from lightning direct damage.

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Electron field emission from Q-carbon

Cited by 41 publications

References 46 publications

Thermodynamics of Mg–Al Order-Disorder Reaction in MgAl2O4-Spinel: Constrained by Prolonged Annealing Experiments at 773–1123 K

Thermodynamics of Mg–Al Order-Disorder Reaction in MgAl2O4-Spinel: Constrained by Prolonged Annealing Experiments at 773–1123 K

Conversion of h-BN into c-BN for tuning optoelectronic properties

Electrically conductive carbon fiber layers as lightning strike protection for non-conductive epoxy-based CFRP substrate

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