Materials Literature
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This paper has examined the hardening effect and mechanism of explosive working on high-manganese steel. According to the experiment result, the surface hardness of high-manganese steel is improved greatly after explosive working and the hardened depth exceeds 40mm. The surface hardness and hardened depth increase sli…
Two cofrequency ultrasonic fields were coupled directly by ultrasonic stationary coupling system to clarify Fe2O3/kerosene sludge medium and achieve the separation of Fe2O3/kerosene. Experimental results show that when sound intensity is close to 80% of the cavitation threshold value, stable stationary field can be fo…
HA/316L powder asymmetrical functionally gradient biomaterial (FGM) with varying 316L content at 100vol%, 80vol%, 60vol%, 40vol%, 20vol%, 0vol% throughout the thickness of the samples was successfully fabricated by hot pressing(HP) technique. The stress relaxation behavior indicates that gradient structure of the asym…
Eu(DBM)3•phen complexes have been Successfully synthesized by the sonication of an Ethanol solution of europium chloride and dibenzoylmethanide (DBM) in the presence of 1,10-phenanthroline(phen). The properties of the Eu(DBM)3•phen complexes were characterized by X-ray diffraction (XRD), scanning electron microscopy (…
A new type photochromic diarylethene, 1-(2-ethylbenzo[b]thiophen-3-yl)-2- (2-methylphenyl)perfluorocyclopentene (1o), was synthesized, and its photochromic and fluorescent properties were investigated. This compound exhibited reversible photochromism and notable fluorescence photoswitches both in solution and in PMMA…
Aqueous oil-modified polyurethane dispersions (PUDs) were synthesized using alcoholysis derivatives of vegetable oil, hydroxyl-terminated polyether, isophorone diisocyanate (IPDI) and dimethylolbutyric acid (DMBA). Alcoholysis was performed in order to insert alcoholysis derivatives, which were used as the polyol comp…
A facile homogenous precipitation method has been developed for the synthesis of multifunctional, luminescent, and magnetic nanocomposites with Fe2O3 nanospheres as the core and europium-doped yttrium oxide (Y2O3:Eu3+) as the shell. The nanocomposites show both ferromagnetic behavior and excellent fluorescence propert…
Biodegradable polyesters with free hydroxyl groups were synthesis by the lipase-catalyzed polycondensation of L-malic acid with different diacids (succinic acid, adipic acid and sebacic acid) and diols (ethandiol, 1,4-butanediol, 1,6-hexanediol and 1,8-octanediol). The molecular weight (Mw) of the copolymers was affec…
Support effects of PW/SiO2 on MPA (p-methoxyacetophenone) synthesis from toluene and acetic anhydride were carefully studied, and catalysts were carefully characterized by BET, XRD and NH3-TPD. The charactrerized results displayed that the interaction between PW and SiO2 prevented the loss of acidic protons from PW to…
CuO-ZnO-ZrO2-TiO2 catalyst was prepared by parallel-slurry-mixing-precipitation method combined with addition of surfactant. The catalyst characterizations were investigated by Nitrogen adsorption-desorption, XRD, SEM and EDS. Results show that the average pore diameter of the mesoporous CuO-ZnO-ZrO2-TiO2 catalyst is…
Graft copolymerization of acrylamide (AM) and diallyl dimethyl ammonium chloride (DMDAAC) onto chitosan in inverse emulsion was studied. The effect on Zeta potential and average granularity of synthetic inverse latex of the main reaction conditions such as the proportion of cationic monomer in total monomers, concentr…
Sulfated zirconia supported on HMS mesoporous silica (SZ-HMS) was prepared and evaluated by catalytic epoxidation of soybean oil. The preparation procedure of SZ-HMS included soaking of HMS with ZrOCl2, and then sulfating with H2SO4. The samples were characterized by IR, XRD, and N2-adsorption. SZ-HMS kept the typical…
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The two component filament/staple fiber core-spun yarn is spun on FA506 ring spinning frame with PTT filament as interlaced yarn and Tencel staple fiber as outer sheath. The spinning process and process parameters were analyzed. The morphology, mechanical property and wear-resisting property of two component core-spun…
Powder of Ti-46at%Al alloy was synthesized through mechanical activation (MA) and then sintered and concurrently consolidated in a short sintering time of 900 s by using spark plasma sintering (SPS) process. The XRD and SEM profiles show that the microstructures of TiAl alloys contained γ TiAl and small amount α-2 Ti3…
Hairball-like bismuth trisulphide microcrystallines has been successfully prepared via one step solvothermal process and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) techniques. The morphologies of the Bi2S3 microcrystallines…
A detailed comparison between kinetic and thermodynamic effects on grain growth in nanocrystalline Gd doped ceria ceramics was given. From the thermodynamic standpoint, the evolution of grain size with annealing time can be described using an analytical model for grain boundary segregation upon isothermal grain growth…
Through the benzene alkylation experiments with long chain olefin over solid acid catalysts activated at different temperature in the fixed-bed reactor, the kinetics of alkylation reaction and the deactivation kinetics of catalyst were established. The results showed that the activity and stability of catalyst decreas…
Poly (methyl methacrylate) (PMMA) sheets were radiated by 60Co γ-ray in air and then irradiated PMMA foams were successfully prepared by supercritical CO2 (SC CO2) as a physical blowing agent via pressure quench method. The effects of radiation dose on the cell morphology and structure of the obtained foams were studi…
Nitrogen-doped mesoporous carbons (NMC) were prepared through a facile procedure using surfactants (polyvinylpyrrolidone) as a nitrogen-containing carbon source. The NMC samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and nitrogen sorption at 77 K. Cyclic voltammetry and…