Materials Literature
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Cowl collar′s modeling has close relations with many factors.Five kinds of fabrics with different properties were used in the experiment,and their physical properties such as thickness,drape,area density and flexural rigidity were measured.In structure design,different slashing amount was taken for reference,one-piece…
Molecular weight and distribution,crystallization behavior,and mechanical properties of polypropylene(PP) powders with different particle sizes were studied using differential scanning calorimetry and gel permeation chromatography.It was found that the molecular weight and distribution,crystallization temperature,crys…
Describes the three different welding technologies of applied to the steel currently by analyzing the weldability of Cr5Mo steel.It can be proposed that welding with the same materials as much as possible in order to avoid joints early failure in the operation and reduce welding cost when it has the availability of po…
Radar absorbing material was fabricated by using of carbon fiber, glass fiber, epoxy resin and MWCNTs. The effect of MWCNTs content on microwave absorbing properties of single-layered radar absorbing material and the effect of stacking sequence on microwave absorbing properties of double-layered radar absorbing materi…
Based on the first-principles methods,the lattice parameter,equation of states and phonon dispersion curves of the three Mg2Si polymorphs are calculated by using the plane-wave pseudo-potential method.The anti-fluorite structure,the anti-cotunnite structure and the Ni2In-type structure of Mg2Si can retain their mechan…
Cd1-xZnxS single crystalline with comb-like nanostructures were successfully synthesized by a simple chemical vapor deposition technology.As-synthesized Cd1-xZnxS nanostructures were characterized using X-ray diffraction(XRD),scanning electronic microscopy(SEM),transmission electronic microscopy(TEM),and selected area…
The preparation process of silver-coated glass cenospheres used in the fields of electromagnetic shielding coating and conductive filler was reviewed.Different methods of three major preparation steps,i.e.pretreatment,plating,and post-treatment,were introduced.The effects of pretreatment method,bath composition,proces…
The single Al2O3 micro-arc oxidation coating can not satisfy the requirement of Al-Si alloy substrate.An Al2O3-ZrO2 compound ceramic layer was produced on Al-Si alloy by micro-arc oxidation.The composition,structure and growth process of the coating were investigated;the thermal isulation property of the coating was a…
The exchange properties of H1.5Ti1.625O4:the pH titration,distribution coefficient Kd,exchange capacity,exchange isotherm,exchange rate etc.were researched.Results showed that H1.5Ti1.625O4 had excellent exchange selectivity and memory ability to Li+.
The photochromic compound of 1-phenoxy-9,10-anthraquinone with high yield was reported.The target compound had three isosbestic points at 387,319,281 nm by UV-Vis spectrum.The variety of absorbance was very notable at 472 nm.The 1-phenoxy-9,10-anthraquinone was proved to have photochromism and the photochromism was ve…
BaMgAl_(10)O_(17):Eu~(2+)(BAM)phosphors were synthesized by high temperature solid state reaction..H_3BO_3、BaF_2、AlF_3、and MgF_2were chosen as fluxes agents,whose influences on phase purity,particle morphology and luminescent properties of blue phosphors were investigated.The results indicated that samples fluxed by H…
It analyzed the existing short comings and problems of existing checking standard about silk fabrics in the actual execution,then several improving measures were put forward.
Hot-dip galvanized steel was pre-treated with silane doped with cerium nitrate.The morphology and chemical component of the cerium nitrate-doped silane coating were analyzed by means of scanning electron microscope and X-ray photoelectron spectroscopy,and its corrosion resistance was evaluated by conducting accelerate…
The influence of different nucleating agents on the crystallization rate and intrinsic viscosity of poly(ethylene terephthalate) was studied using differential scanning calorimetry(DSC) and Ubbelohde viscometer,respectively.It showed that hybrid nucleating agents(half-crystallization time was 32.3~45.3 s) had advantag…
Up to now,the mandrels of the ring rolling mill all over the world are rotated passively by the workpiece through the main rolling wheel.For the ordinary vertical mill,the ring blank is sleeved on the mandrel.The friction of the main rolling wheel has to above the rotary inertia and other resistance of ring blank and…
A series of Ni2P-modified MoS2/γ-Al2O3 catalysts with constant Mo contents were prepared by the thermal decomposition of ammonium tetrathiomolybdate and nickel hypophosphite under N2 atmosphere.The structure of the catalysts was characterized by N2 adsorption-desorption,X-ray diffraction,and high-resolution transmissi…
The rheological behavior of telechelic liquid polybutadiene rubber/organoclay nanocomposite gels has been studied under the steady shear performed on a HAAKE RheoStress 600 instrument.And the microstructure of nanocomposite gels was characterized by X-ray diffraction(XRD) and transmission electron microscopy(TEM).The…
Circumferential cracks of a Cr12MoV ring mold was found after tempering.The cause of the cracks was studied by metallurgical inspection,chemical composition analysis and hardness testing.The results show that the cracks were quenching cracks,and they were mainly caused by the longer cooling time in the oil quench proc…
Ni(OH)2 and Zn(OH)2 precursor were prepared by sol-gel method.Ni(OH)2gel was sintered into NiO powder by a tube furnace and vacuum sintering furnace respectively.Zn(OH)2 gel was sintered into ZnO powder by the tube furnace.The samples were characterized by X-ray diffraction.The photocatalytic degradation of methyl ora…
Based on analyzing characteristics of the pleat apparel and its pattern,a new grading approach of the pleat apparel pattern is developed by grading examples.The coordinate is established before the piece is spread out.The quantity of grading is distributed by proportion of the part and total.The direction of points of…