Journal of Materials Science
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The influence of chemical structure on the friction properties between particles and compacted powder surfaces
Journal of Materials Science - - 1996
Friction measurements on particles adhered to compacted powder surfaces have been undertaken by the centrifuge technique to investigate the influence of the variations in the chemical structure of a series of salts of salmeterol. Two mathematical models have been used to evaluate the experiments, and the coefficient of static friction, the friction force and the theoretical shear force on compacte...... hiện toàn bộ
Preparation of functionalized GO coordination compound and its catalytic performance for thermal decomposition of ammonium perchlorate
Journal of Materials Science - Tập 56 - Trang 19599-19613 - 2021
Coordination compounds are very promising as energetic materials and catalysts for improving the comprehensive performance of solid propellants. In this study, to obtain insensitive energetic materials with excellent performance, graphene oxide (GO) as template, nitrogen-rich 3-amino-1,2,4 triazole (AMTZ) and Co(NO3)2·6H2O as ligands, a new energetic coordination compound (GO + Co + AMTZ) was synt...... hiện toàn bộ
Direct experimental evidence for flow induced fibrous polymer crystallisation occurring at a solid/melt interface
Journal of Materials Science - Tập 35 - Trang 5247-5253 - 2000
We report experimental observations on the way that flowing polyethylene melts can crystallise within a processing channel geometry. Using a recently developed Multipass Rheometer (MPR), we present rheological, rheo-optic and coupled X-ray data that follow the evolution of crystallisation, as molten polyethylene flows into a slit geometry. Optical observations show that fibrous crystallisation occ...... hiện toàn bộ
Assembly of mesoporous SnO2 spheres and carbon nanotubes network as a high-performance anode for lithium-ion batteries
Journal of Materials Science - Tập 53 - Trang 15621-15630 - 2018
We report a facile and effective aerosol-spray strategy toward high-performance anodes for lithium-ion batteries by incorporating mesoporous SnO2 spheres of high-capacity materials with surface-modified carbon nanotubes (MCNTs). SnO2 nanocrystals are self-assembled into mesoporous spheres, and MCNTs with abundant carboxylic groups serve as a conductive scaffold. Driven by the strong interaction be...... hiện toàn bộ
Effect of arc current on the microstructure, tribological and corrosion performances of AISI 420 martensitic stainless steel treated by arc discharge plasma nitriding
Journal of Materials Science - Tập 58 - Trang 2294-2309 - 2023
Arc discharge plasma nitriding (ADPN) of stainless steel was achieved using the thermionic electrons generated from column arc discharge to ionize the working gas to form a high-energy plasma. The column arc current is a key influential factor in the ADPN technique. AISI 420 martensite stainless steel (420 SS) was nitrided at a low temperature of ~ 440 °C to improve its mechanical properties and c...... hiện toàn bộ
Yield stress of SiC reinforced aluminum alloy composites
Journal of Materials Science - Tập 45 - Trang 4097-4110 - 2010
This article develops a constitutive model for the yield stress of SiC reinforced aluminum alloy composites based on the modified shear lag model, Eshelby’s equivalent inclusion approach, and Weibull statistics. The SiC particle debonding and cracking during deformation have been incorporated into the model. It has been shown that the yield stress of the composites increases as the volume fraction...... hiện toàn bộ
Evolution of microstructures and phases of Al–Mg alloy under 4 GPa high pressure
Journal of Materials Science - Tập 42 - Trang 7123-7128 - 2007
Optical microscope (OM), energy dispersive X-ray (EDX) analysis, differential scanning calorimetry (DSC), X-ray diffraction (XRD) and transmission electron microscope (TEM) were applied to investigate the solidification microstructures and phases of Al–9.6 wt.% Mg alloy which solidified under 4 GPa high pressure with the melting temperature 1,153 K. Fine dendritic microstructures were obtained, an...... hiện toàn bộ
Influence of purity and level of disorder on the spinnability of CNTs yarn derived from the CNTs forest grown by a parametrically tuned CVD
Journal of Materials Science - Tập 59 Số 1 - Trang 3-19 - 2024
Direct observation by high resolution autoradiography of interfacial diffusion in a Ni, Cr-TaC composite
Journal of Materials Science - Tập 13 - Trang 2333-2338 - 2013
Interfacial diffusion has been evidenced in a eutectic-like Ni, Cr-TaC composite, using high resolution autoradiographic techniques. The structure of the fibre-matrix interface has been determined by using high voltage electron microscopy. The fibre-matrix interface has been shown to be a diffusion short circuit in the temperature range 700° C to 900° C.
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