Polyurethane microcapsules containing water-borne polyurethane (PU) paint as a core material for self-repairing protection coatings were successfully manufactured <italic>via</italic> interfacial polymerization of diol–diisocyanate prepolymer and 1,4-butanediol chain extender in an emulsion solution.

Ohmic contact formation mechanism of Ni on n-type 4H–SiC is proposed by comparing the electrical properties with microstructural change. The ohmic behavior was observed at temperatures higher than 900 °C, but Ni2Si phase, as formerly reported to be responsible for contact, formed after annealing 600 °C. work function and observation graphite phase surface silicide 950 °C support that a number carbon vacancies were produced below playing key role in forming an through reduction effective...

In this paper, current conduction mechanisms of an atomic-layer-deposited HfO2 gate stacked on different thicknesses thermally nitrided SiO2 based n-type 4H SiC have been investigated and analyzed. Current-voltage high-frequency capacitance-voltage measurements conducted at various temperatures (25−140 °C) were performed in metal-oxide-semiconductor test structures with 13 nm thick 0-, 2-, 4-, or 6 SiO2. Various mechanisms, such as Schottky emission, Fowler-Nordheim tunneling, Poole-Frenkel...

In the present work, corrosion inhibition properties of three amino acid compounds, glycine (Gly), 2,2′-azanediyldiacetic (IDA), 5-aminopentanoic (5-APA), and two triazine (Tris) derivatives containing Gly or IDA units were investigated. It was found that acids their behaved like mixed-type inhibitors reduced oxidative dissolution retarded a hydrogen emission reaction. case acids, it increase in length number carboxylic groups molecules enhanced properties. also observed presence ring...

A global model was developed to investigate the densities of negative ions and other species in a low-pressure inductively coupled hydrogen plasma with bi-Maxwellian electron energy distribution. Compared Maxwellian plasma, plasmas have higher populations low-energy electrons highly vibrationally excited molecules that are generated efficiently by high-energy electrons. This leads reaction rate dissociative attachment responsible for ion production. The indicated distribution at low...

Polyurethane microcapsules containing the triazole derivative and oleate as core materials were successfully prepared via interfacial polymerization in an oil-in-water emulsion of diol-diisocyanate prepolymer 1,4-butanediol a chain extender under agitation or ultrasound sonication. The diameters resultant capsules which possess agent are 25–276 μm shell thickness is 1.9–18.0 at controlled rates (1000–6000 rpm). Typical content microcapsule yield capsule 45–67% 38–75%, respectively, with...

We added a block copolymer compatibilizer to thermodynamically immiscible blend of poly(lactide) (PLA) and poly(amide11) (PA11) achieved maximum strain at break (εb) toughness (γ) 467% 157 MJ m–3, respectively, which were about 30 times higher than those the neat PLA/PA11 system, while maintaining yield stress (σyield) 87% that PLA homopolymer. The PA11 based di-, tri-, multiblock compatibilizers synthesized via bulk polycondensation reactions 11-aminoundecanoic acid (11-AUDA) hexamethylene...

A phenomenological-based virtual metrology (VM) technique is developed for predicting the silicon nitride film thickness in multi-layer plasma-enhanced chemical vapor deposition (PECVD). Particularly, analysis of optical emission spectroscopy based on excitation kinetics nitrogen plasma used to develop novel variables, named plasma-information (PI) variables. One variable, PIWall, determined by analyzing light transmittances emissions at contaminated window, representing drift reactor-wall...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The MOS characteristics of an atomic layer-deposited <formula formulatype="inline"><tex>$\hbox{HfO}_{2}/ \hbox{N}_{2}\hbox{O}$</tex></formula>-nitrided formulatype="inline"><tex>$\hbox{SiO}_{2}$</tex></formula> stacking gate dielectric on n-type 4H SiC (0001) has been investigated. Three different thicknesses nitrided (2, 4, and 6 nm) have sandwiched between...

Current conduction mechanisms of an atomic-layer-deposited Al2O3 gate on n-type 4H SiC have been systematically investigated, analyzed, and reported in this letter. It has revealed that space charge limited, Poole-Frenkel (PF) emission, combination PF emission Fowler-Nordheim tunneling are the dominate current dielectric. Besides, Schottky also proposed as a possible leakage path at temperature beyond investigated range. A relationship among mechanism, temperature, applied electric field presented.

We report the first electronic-property results on atomic-layer deposited /thermal-nitrided stacking dielectric n-type 4H SiC. The effects of ultrathin thermal-nitrided (2, 4, and ) SiC-based metal oxide semiconductor (MOS) characteristics have also been investigated, compared, explained. A significant improvement in reliability breakdown field has observed after an nitrided introduced between best reported were obtained from stacked with thickest .

The effects of thermal nitrided gate-oxide thickness on n-type 4H silicon-carbide-based metal-oxide-semiconductor characteristics have been reported. Seven different thicknesses oxide (tox), ranging from 2to20nm, investigated. It has shown that effective charge (Qeff) and total interface-trap density (Nit) demonstrated a cyclic trend as tox is increased. These observations explained in the letter. Correlations Qeff Nit with breakdown field current transport mechanism these oxides also...

The corrosion behavior of mild steel was studied in 1 M HCl solution containing varying amounts triazine derivatives having amine groups and alkyl carboxylic acid groups. synthesized were characterized by Fourier transform infrared (FT‐IR) spectroscopy, NMR , mass elemental analysis ( EA ), their inhibition properties determined potentiodynamic polarization electrochemical impedance spectroscopy EIS ) techniques. We found that the acted as mixed‐type inhibitors adsorption on metal surface....

A series of poly[amide11-alt-poly(dimer acid-alt-1,5-diamino-2-methyl)] multiblock copolymers [PA11Hx-alt-(DA-MP)Sy] with high renewable content (up to 95%) was synthesized via bulk polycondensation a plant oil-based diacid-terminated PA11 hard block (PA11Hx) and diamine-terminated PA soft [(DA-MP)Sy] (wsoft = 0.31–0.90). The tunable superior mechanical properties (E 4–233 MPa, σyield 20–33 σb 744–2233%, γ 222–359 MJ m–3) the PA11Hx-alt-(DA-MP)Sy depended on chain lengths both crystalline...

The enhancement of deuterium retention was investigated for tungsten in the presence both 2.8 MeV self-ion induced cascade damage and fuel hydrogen isotope plasma. Vacancy clustering damaged polycrystalline occurred due to irradiation observed near grain boundary by using all-step transmission electron microscopy analysis. Analysis highest desorption temperature peak thermal spectroscopy supports reasonable evidence defect tungsten. neither on without nor single-crystalline with irradiation....

Green corrosion inhibitors, n-dodecyl succinate derivatives containing one (HSE) or two triazole groups (DSE), were prepared by three step reactions, that is, nucleophilic substitution reaction, click coupling and esterification reaction. The characterization results obtained from 1H NMR, FT-IR, elemental analysis indicated the synthesized successfully. rust preventing properties of final products also investigated using both ASTM D665 weight loss methods. It was found strength...

A mechanically adjustable reinforced thermoplastic superelastomer system, with tunable gas-permeability, was developed. The is based on a graft copolymer structure, using commercial butyl rubbers (or poly(isobutylene-co-isoprene), P(IB-co-I)) and l- or d,l-lactide (LLA LA) derived from renewable feedstocks, by "grafting from" controlled polymerization. First, hydroxyl-functionalized PIB (PIB-g-(OH)) macroinitiators were prepared through epoxidation an economical alternative to...

Polyamide 11 (PA11) is a semicrystalline polymer with excellent mechanical property. However, the use of PA11 high crystallinity as an engineering plastic limited because its low impact resistance. In this work, series sustainable poly(PA11-co-DA) copolymers (PAx-p-DAy) were synthesized via polycondensation from vegetable oil-based dimer acid (DA) and diamine terminated polyamide (ATPA11-x). The molecular structure PAx-p-DAy was characterized by 1H NMR, 13C FT-IR, XRD, viscometry. properties...

The effect of collisions on the motion magnetized ions in sheath and presheath plasma regions was investigated through measurement ion incident angle a hydrogen at graphite surface. experiment conducted deuterium plasmas where mean free path is 5–10 times larger than gyro radius with varying magnetic field ψ from 0° to 90° normal target actively reacted carbon, leading formation conical tips axes directed along flow direction. measured etched images taken by scanning electron microscopy....