Materials Literature
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In this study,polycrystalline TiN/AlN multilayer film with various modulation ratios was deposited onto silicon substrate using pulsed laser ablation.The microstructure and the nanoindentation hardness of TiN/AlN multilayer films were also investigated.SEM and AFM confirmed a standard modulation ratio ranging from 1 t…
Let Hn(p,q) be a tree obtained from two stars K1,p and K1,q by identifying the center of K1,p with one end of a path Pn and the center of K1,q with the other end of Pn.We call Hn(p,p-1) a double quasi-star tree.In this paper,we show that a double quasi-star tree is determined by its Laplacian spectrum.
The influence of different content of boron in solid solution on the mechanical properties of low carbon Nb-Ti-B steels of beam plate for automobile produced by FTSR was studied.The results show that the critical of boron in solid solution,which is helpful to increase the strength of the tested steel,is about 0×10-6,a…
Effect of trace heavy metal ions,e.g.,Cu~(2+) and Fe~(3+),on the corrosion behavior of aluminum alloy 5052 immersed in(70 ℃) deaerated artificial seawater were investigated in terms of similar corrosion occurring in low-temperature multi-effect distillator.The polarization curves showed that,trace heavy metal ions(10~…
As the world's phosphate rock resource is being exhausted,it is increasingly important to recover and utilize phosphate tailings.The micro phenomena of reaction process of phosphate tailings in sulphuric acid are detected and studied by SEM,XRD,EDAX,TEM and other analysis methods.It is indicated that the reactive comp…
This article discussed the spinning sandbox used for one step polymerization and spinning of nylon 66 industrial yarn.The uniform of single filament,the life time of spinning pack,spinnability and the yield of the product were compared before and after using advanced spinning sandbox.The results showed that with impro…
By several power shot tests on the specimen of alloy carburizing gears,the effects of shot peening strengthening with different parameters and low temperature aging on contact fatigue strength of bearing surface were researched.It provides an important reference forthe application of shot peening process in industrial…
White organic light-emitting devices(WOLEDs),with the structure of ITO/2T-NATA(15nm)/NPBX(20nm)/rubrene(0.2nm)/NPBX(5nm)/CBP∶6% Ir(ppy)3∶15 %ADN(30nm)/BCP(10nm)/Alq_3(25nm)/LiF(0.5nm)/Al,are fabricated by using phosphorescence sensitizer and hole-blocking layer.The devices show the maximum luminous efficiency…
Представлены результаты первопринципных расчетов методами теории функционала электронной плотности атомной и электронной структуры Pd с симметричными границами наклона 25(210) и 25(310). Обсуждается сорбция водорода на границах зерен и соответствующих свободных поверхностях. Показано, что энергия сорбции водорода увел…
The microstructure morphology of asphalt rubber to be used in the stress absorbing layer was observed with fluorescence microscopy and its mix-melting mechanism was studied. The impacts of the parameters,such as the size of rubber powder,mixing amount and mixing temperature,on the performance of the asphalt were analy…
A normal approach for studying corrosion inhibition performance of polyaspartic acid on carbon steel in sulfuric acid solution was used as the loss-weight method.Effect of polyaspartic acid concentration,temperature and concentration of sulfuric acid on corrosion inhibition performance were investigated.Under the cond…
The paper is related to longitudinal characteristics of the image pre-processing of cotton and modal fibers based on Matlab.According to the order of processing,it applied gray,enhancement,filtering,thresholding,rotation and other methods to identify the cotton fiber and modal fiber from the blended yarn,and extracted…
The average burning time and impact toughness as indexes,n-pentane as blowing agent,ammonium polyphosphate and melamine as flame retardants.The formulation of flame retardant polyurethane foam plastics were studied by SEM,IR spectra,impact testing machine,horizontal and vertical burning tester means.The results indica…
Owing excellent properties superior to other materials,Mg base alloy has been attracting wide attention and has increasing potential of application.In this article,all kinds of studies concerning electrolysis method of Mg base alloy preparation was reviewed in details,whose predominance compared with conventional meth…
Hydration curves of cements with varied superplasticizer were measured by isothermal calorimetry(TAM-AIR).Three heat release curves were analyzed by Db10.Cement hydration curve with new-type superplasticizer of polycarboxylic acid(SPC) lags behind that of cement adding naphthalene sulphonate formaldehyde(NSF) condensa…
Aligned carbon nanofibers(CNFs) were synthesized by chemical vapor deposition(CVD) of acetylene using copper sol as catalyst precursor and acetylene as carbon source on brass substrate.The products were characterized by SEM,XRD and IR.It was observed that CNFs with diameter of 150—200 nm and length of a few to dozens…
On basis of crystal field theory,considered the radius and valence charge of transition metal ion are not the same with that of the substituted one in tetragonal crystal system,the local structure extension model of transition metal ion (3dn/10-n) has been built. Furthermore,in a tetragonal strong field scheme by semi…
Fe5 deposited metal was overlaid on low carbon steel by plasma arc surfacing with transverse magnetic field.The microstructure and properties of the overlayer improve by the effect of magnetic field.The parameters of magnetic field and welding process was altered during welding progress.After PLA with magnetic field,w…
Taking lithium carbonate,nickel hydroxide and nitric acid as raw materials,LiNiO2 was synthesized by half solid-state reaction,and influences of synthesis condition and synthesis process on performance of product were investigated.The thermal behaviors of the samples were analyzed by DSC-TG,and the microstructure and…
The cavitation associated with the formation,growth and the collapse of micro-bubbles leads to the generation of very high pressures and temperatures locally,which can cause a series of physical and chemical reactions. The molecular link of hydrone in the solution is broken by the energy released from the high pressur…