Room-temperature aqueous plasma electrolyzing Al2O3 nano-coating on carbon fiber

Plasma Electrolysis Spraying Al2O3 Coating onto Quartz Fiber Fabric for Enhanced Thermal Conductivity and Stability

“…The effect of the coating on the high thermal conductivity of quartz fibers was investigated. The formation mechanism of the Al2O3 coating was preliminarily discussed [29,30]. We believe that the thermally conductive quartz fiber with high thermal stability by plasma electrolysis spray will be widely used in flexible thermal shielding and insulation materials.…”

Amorphous Alumina Thin Films Deposited on Carbon Microfibers As Interface Layer for Thermal Oxidation Barriers

“…Indeed, carbon microfibers are not subjected to creep with the increase of temperature, and exhibit even higher elongation modulus, contrary to ceramic microfibers such as SiC or boron-doped alumina . Thus, carbon microfibers make a promising material alternative for applications in air at high temperature, provided that they are shielded from oxidation over 670 K. Among the various methods reported for the deposition of a refractory oxygen diffusion barrier layer (OBL), such as chemical vapor deposition (CVD), sol-dipping, , or plasma electrolysis, , atomic layer deposition (ALD) was often preferred for the conformal aspect of the deposited film. ,− Indeed, ALD relies on the sequential injection of two coreactants, thus allowing for the deposition of a conformal layer through self-limitation of the half-reactions, constrained in thickness to one atomic layer of the deposited elements. ,,,, Owing to the gas phase process that is ALD, the conformal deposition was also successfully reported on three-dimensional substrates and textured surfaces. ,,,− To answer the multipart problem of deposition of an efficient refractory OBL on a carbon surface exhibiting a sharp interface with the carbon microfiber and with thermal expansion coefficients in a compatible range and a density light enough to limit the loss in elongation modulus, several compositions of thin films have been explored, namely, vitreous materials such as boron, zirconium, , or silicon, , and light metal oxides such as alumina or titania. ,,, Deposition of the latter two was widely reported feasible by low temperature ALD, which is here crucial considering the sensitivity of the carbon microfibers to thermal oxidation. , Furthermore, the use of partial exposure mode in ALD (outlet valve of the reactor shut during precursor pulses), which favors the diffusion of precursors within the bulk of the substrate, allows for in-depth gradient-free film coverage of the 3D substrate, as opposed to film coverage solely on the microfibers exposed at the surface of the woven fabric …”

“…5 Indeed, carbon microfibers are not subjected to creep with the increase of temperature, and exhibit even higher elongation modulus, contrary to ceramic microfibers such as SiC or boron-doped alumina. 3 Thus, carbon microfibers make a promising material alternative for applications in air at high temperature, provided that they are shielded from oxidation over 670 K. Among the various methods reported for the deposition of a refractory oxygen diffusion barrier layer (OBL), such as chemical vapor deposition (CVD), 5 sol-dipping, 6,7 or plasma electrolysis, 8,9 atomic layer deposition (ALD) was often preferred for the conformal aspect of the deposited film. 1,10−13 Indeed, ALD relies on the sequential injection of two coreactants, thus allowing for the deposition of a conformal layer through self-limitation of the half-reactions, constrained in thickness to one atomic layer of the deposited elements.…”

One−Step Synthesis of Popcorn−Carbon/Co3O4 Composites as High−Performance Supercapacitor Electrodes

“…Therefore, it is urgent to seek an efficient, environmentally friendly, and low−cost technology for realizing a composite of biomass−derived porous carbon and Co 3 O 4 . In this study, a novel assisted liquid−phase plasma electrolysis [15][16][17] was proposed to realize the high−efficiency composite of biomass−derived porous carbon and Co 3 O 4 . Assisted liquid−phase plasma electrolysis was developed on the basis of chemical vapor deposition (CVD), electrodeposition, and traditional cathode plasma electrolysis.…”