Materials Literature
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Resistance to chloride stress corrosion cracking for 316L stainless steel welded joint at different test temperatures,pH values,chloride ion concentrations and applied stress in the simulating gas field condensate water and gas field water according to actual gas field containing CO_2 were studied.The applied boundary…
A quantitative method for the determination of the total content of chitooligosaccharides was studied by Imoto colorimetry. The method was improved and verified in the aspects of standard sample,wavelength,reagent,colorimetric conditions. The result showed that the chitooligosaccharides content could be well calculate…
Starch-based films were prepared by a solution casting method,the raw material are starch and poly(vinyl alcohol),glycol is plasticizer.The effects of various factors,such as feed concentration,the mass ratio and plasticizer content,on mechanical,oil resistance and crystallization properties were examined.The results…
In order to improve the mechanical and chemical properties,especially the solvent resistance of the cast films formed from normal waterborne polyurethane(PU) dispersions,a novel ultraviolet(UV)-curable epoxy and acrylate-modified waterborne polyurethane dispersion(UV-EP-AC-WPUD) and its film with high crosslinking den…
Nano-sized CaTiO3∶Zn particles were synthesized by a sol-gel technique.The average particle size of the powder calculated from TEM micrograph is 25 nm.Zn substitution site has great influence on the phase composition and the sintering temperature of the ceramics.The added Zn exists as Zn2TiO4 phase for Ca1-xZnxTiO3 an…
Traditional and up-to-date definitions of pearlite were introduced.Morphology and formation mechanism of martensite which produced during quenching and subsequently was tempered were briefly described.When hightemperature tempered,the quenched martensite will decompose into a dual-phase structure which consists ofα-ph…
According to finite element method,the process of die forging shaping for RL1016R blade was numerically stimulated.The results indicate that the questions are that the stress concentration at the boss connecting area is relatively obvious,the metal streamline at blade-tip-shroud connecting area presents counterflow.Th…
The oxidation mechanism of C/SiC composite material were examined in detail.The C/SiC material exhibit two types of oxidation behaviour: active and passive oxidation at high temperature depending on ambient oxygen partial pressures and mass fractions of C and SiC in the C/SiC composite material.The silicon based mater…
To explain calculation of fingerprint total quantum statistical moment(TQSM) and to decide integral condition with HPLC fingerprint of the BYHW recipe as model drugs.
Polyamide elastomer(polyamide-polyoxyethylene copolymer,PAE) was used to toughen PLA via melt blending.It was found that a brittle-ductile transition occurred when PAE content was between 20 %~30 %.The maximum impact strength was 67.6 J/m,but the tensile strength and modulus decreased sharply.When the PAE contents wer…
In order to evaluate the applicability of ReaxFF in Aluminum, some physical properties about aluminum were calculated by reaction force field (ReaxFF), and compared with embedded atom method (EAM), DFT and the experimental value. The result is that the energy and the elastic constant calculated by ab initio and EAM me…
Carbon microspheres(CMSs) is very important one of the carbon funcfional materials,has a unique structure and excellent physical and chemical properties,is a materials science research focus.Carbon microspheres were firstly modified with tetraethyl orthosilicate as precursor to introduce hydroxyl groups onto the surfa…
The dispersed emulsion droplet behavior in high-frequency electric field is of great importance to demulsification technique and many industry applications.The study of the droplet behavior in high-frequency electric field is less for now.Aiming at providing fundamental insights into this field,a systematic investigat…
External insulation status assessment of contaminated insulator is proposed in this paper using the acoustic emission signals generated when the polluted insulator flashover discharges to improve the accuracy of diagnosis on insulator's external insulation.Through artificial contamination experiments,the acoustic emis…
Using first principle method combined with quasi harmonic Debye Model,the effects of C,N doped on electronic structure and phase transition temperature of β-Ti3O5 and λ-Ti3O5 were studied in this paper.The results showed that C element has a much larger effect on the electronic properties of both phases.The band gap o…
Effects of rolling processes(cross rolling and unidirectional rolling) and 3 kinds of heat treatment processes on mechanical properties in every direction of TC4-DT titanium alloy sheets were investigated through microstructure observation and tensile tests.The results show that compared with the unidirectional rollin…
The electronic structures and optical properties of all kinds of defect caused by self-ion interstitial in silicon have been studied using the first principle with ultra-soft pseudopotentials.The calculated results show that lattice parameter,volume,electronic and optical properties have been changed with different de…
This experiment evaluated biogas slurry compost,and was particularly interested in the changes in maturation time and composition characteristics that resulted from the application of nitrogen additives.We investigated changes in various fermentation and maturation processes in both biogas slurry and leaf composts,and…
Aimed at addressing the vulnerability of anti-corona layer surface to the corona and thermal aging arising out of the uneven distribution of electric field on the large motor stator bar end,this paper describes the numerical calculation of distribution of electric field and loss density of large electric machine by co…
Adsorption and separation of 1∶ 99(volume ratio) H2S/N2 mixture by single wall carbon nanotubes were studied using the grand canonical Monte Carlo(GCMC) method at a range of nanotube diameters,pressures and temperatures.It is demonstrated that the selectivity towards H2S increases and then decreases with increasing na…