Materials Literature
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Maraging steel has ultra-high strength and fine comprehensive characteristics.However,a large number of banded structure was found in the forging process,such structure has seriously affected the properties of the material,such as anisotropy,lower plasticity,impact toughness and reduction of area.This paper focuses on…
OBJECTIVE To prepare aluminum hydroxide granules modified with stearic acid,and test the release rate in vitro.METHODS The modified aluminum hydroxide was synthesized with stearic acid and used to prepare the sustained-release preparation;The modified sample was indentified by FT-IR and determined release rate using U…
The scab of transmission gearbox shell was studied, and the possible causes of the scab in the green sand casting were analyzed. Finally the defect of scab was eliminated through controlling properties of molding sand, pouring time and coating, etc.
This article introduced a kind of squeeze roller of special manganese-titanium alloy steel used in high frequency welded pipe.The squeeze roller belongs to non-quenched casting steel with extraording anti-abrasion property and low conductivity magnetic.It can be used by unlimited reapair in case of OD permission,and m…
The preparation of surfactant-free styrene-acrylate coplymer and emulsification of fluid anthraquinone was in-vestigated and a cooking experiment of triploid of polulus tomentosa with the prepared composite emulsion was performed and a performance test was carried out.When using the copolymer emulsion as dispersant an…
In this study,we investigated the microstructure and magnetic properties of Nd2Fe14B/α-Fe nanocrystalline two-phase composite permanent magnets prepared by controlled melt-solidification and amorphous crystallization.Analysis of X-ray diffraction(XRD) showed that,with a wheel speed of 20m/s,a proper degree of undercoo…
Pore structure is one of critical factors for influencing intrinsic characteristic and application effect of metallic porous material. Pore structure is decomposed into pore shape, pore tortuosity and roughness, porosity, pore diameter and surface area. The usual characterization technology and development and technic…
β-cyclodextrin was taken as wall materia1 and the deer placenta polypeptide was made into microcapsules by ultrasonic.The orthogonal test results showed that the optimum conditions of process are as follows:ratio of core material to wall material 1:20,ultrasonic power 160 W,ultrasonic time 100 min,ultrasonic temperatu…
With AlCl3 as catalyst in solution system,the influence of temperature,amounts of catalyst,kinds of solvent on properties of crosslinking and grafting of ethylene-propylene-diene terpolymer(EPDM)were investigated.The results show:At low temperature,the crosslinking reaction is difficult,but the grafting reaction betwe…
The spot welding of rapidly solidified Fe-Cu alloy foils with 35-45 μm in thickness was conducted using a mini-type capacitor discharge welder. The microstructure of nugget was observed. The cooling rate and the temperature gradient of nugget were analyzed theoretically and the relationship between the microstructure…
The uncertainty in the determination of Sn in tin bronze was evaluated by Photoelectric Direct Reading Spectrometry.The uncertainties including calibration curve,standard value,and randomicity of measurement have a great influence on the determination.Therefore,controlling the above factors can effectively reduce the…
This article mainly introduced the prospect and today's major new technology in the coating pretreatment.
A series of Zr-Al-N composite films with different Al contents and a series of Zr-Al-Si-N composite films with different Si contents were prepared by multi-target reactive magnetron sputtering.The films were surveyed with energy dispersive spectroscopy,X-ray diffraction and microhardness tester.The effects of Al conte…
A nanocrystalline surface layer is fabricated on a quenched and tempered 38CrSi Steel by using Supersonic Fine Particles Bombarding(SFPB).The micro-structural evolution of 38CrSi Steel is characterized by using X-ray diffraction,scanning electron microscopy and transmission electron microscopy.Experimental evidence sh…
ABS/DBDPO/Sb2O3 and ABS/DBDPE/Sb2O3 composites have been prepared,and their flame retarding performance was studied using cone calorimeter and simulated with field simulation software(FDS).Compared with ABS/Sb2O3,the average value of heat release rate,peak heat release rate,effect heat combustion,and total heat releas…
The nano-Ag-loaded vermiculite was prepared at room temperature by ion exchang using Xinjiang vermiculite,treated with acid,heat and sodium chloride,as raw material and was characterized by IR spectrometry,XRD,atomic absorption spectruometry,and SEM.The results show that the nano-Ag-loaded vermiculite has the similar…
The microstructure,mechanical properties and retained austenite stability of CMnAlCu-TRIP steel were investigated.The cold-rolled steel sheet with a thickness of 1mm was intercritically annealed at 820℃ for 2min then isothermally treated at 500℃,450℃ and 400℃ for different time.The microstructures of the specimens wer…
In order to investigate the mechanical properties of polycarbonate/(acrylonitrile-styrene-acrylic)terpolymer(PC/ASA) alloy reinforced with inorganic particles,both PC/ASA/SAN/TiO2 and PC/ASA/SAN/CaCO3 were prepared by the melt blending method.The effect of the mass fraction of filler and the particle size on the tough…
FeCu thin films were prepared by magnetron sputtering on Si substrates and annealed in vacuum in the temperature range from 300 to 600 ℃.The structure and magnetic properties was analysed by XRD and VSM.The results showed that metastable FeCu alloys decomposed into fcc Cu and bcc Fe at 300 ℃.With the increasing of the…
ZnO:Al thin films were prepared by the sol-gel dip-coating process on soda-lime glass substrates.The physical and chemical changes of the precursors during thermal treatment were analyzed by the thermogravimetry-differential scanning calo-rimetry curves and the crystalline quality was characterized by X-ray diffractio…