Materials Literature
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Two process routes using carbide/ethylene as raw materials for domestic PVC production are introduced,and the analysis and the comparison of the two are made.It's pointed out that these things must be done:to abandon the outdated processes of production,develop high-end PVC products,optimize the PVC industrial structu…
The basic concepts of metabolism and influencing factors were introduced. The impact of metabolism on PMV was analyzed,and some factors that impact human-body thermal comfort were discussed,especially the metabolism.
The reliability of Yingtan soil simulated solution was investigated by electrochemical impedance spectroscopy and potentiodynamic polarization curves.The effect of environmental factors,including dissolved oxygen,temperature,conductivity and pH,on the corrosion resistance of X70 pipeline steel in Yingtan soil simulate…
A contrast study has been performed of carbon removal by ammonia water before combustion in an IGCC (Integrated Gasi-fication Combined Cycle) and after combustion in the coal-fired power plant of a power generation system. It has been found that when the carbon is removed before the combustion,ammonia loss and content…
Corrosion is one of the main reasons causing the damage of submarine pipelines.The long longitudinal corrosion defect is one of major corrosion pattern for submarine pipelines.In this paper,the ultimate load and failure behavior of submarine pipeline with long longitudinal corrosion defects exposed to internal pressur…
On the basis of the detailed chemical kinetic mechanism of methanol oxidation,the simplified chemical kinetic mechanism of methanol including 18 species and 28-step elementary reaction was presented to describe premixed laminar flame speed with sensitivity analysis.It is found that the methanol oxidation exhibits stro…
Boron carbide ceramics were synthesized and desificated in one step by spark plasma sintering(SPS) technique using boron and graphite powders as raw materials.The impact of sintering temperature,sintering pressure,holding time and heating program,on sintering performance of boron carbide ceramics was studied.The resul…
Polypyrrole was obtained by chemical synthesis. The extension of polymerization time to 96 h produced a polypyrrole that was suitable for absorbing moisture. The structure and morphology of polypyrrole were characterized by infrared (IR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Pr…
FeAl intermetallic compound coating was in-situ prepared by cold spraying a mechanically alloyed FeAl alloy powder on the matrix-heat-resistant 2520 stainless steel,assisted with post-spray annealing. The high-temperature abrasive wear performance of cold-sprayed FeAl coating from room temperature to 800oC was investi…
Taking ecological reconstruction of Suzhou Creek as a research object,by setting six sampling points,Huangdu,Huacao,Beixingjing,Wuninglu Bridge,Changshoulu Bridge,Zhejinanglu Bridge,the survey of phytoplankton community structure was carried out.Nine samples according to the four seasons from October of 2000 to Octobe…
Based on the recent research of Si3N4 powders synthesis methods all over the world,some primary methods were comprehensively reviewed,such as the direct nitridation,ammonolysis of Si(NH)2,vapor deposition.The advantages and disadvantages of each method of making Si3N4 powders for multicrystalline ingot coating were co…
Cementation is one of the most pupular solidifacation technology for the low-and-intermediate levele liquid radioactive waste.It has been applied in all of domestic PWR NPPs.The process characteristics and operation of the cementations in the different NPPs are introduced,and the advantage and disavantage of the cemen…
Potassium dihydrogen phosphate(KDP)crystals were grown in the presence of Al3+ impurities via conventional temperature cooling method and rapid growth method,respectively.The growth rate of the prismatic face of KDP crystals was measured using a laser-polarization-interference technique.Experiments showed that Al3+ do…
The Gibbs free values of different SiAlON were assessed by the thermodynamic quasi-paraboloid rule in Si3N4-AlN-SiO2-Al2O3 system and the thermodynamic parameter for β-SiAlON were explored at 1800K.The synthesis of β-SiAlON based on coal gangue and carbon black by carbonthermal reduction nitridation method,and phase t…
Phenol-biphenylene resin was synthesized with phenol and 4,4′-bi(chloromethyl)biphenyl as monomers and hydrochloric acid as the catalyst by Friedel-Crafts alkylation.The structure of the product was characterized by using Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H NMR, 13C NMR).G…
The thermal decomposition of 2-ethylhexyl nitrate(EHN) was investigated using an adiabatic calorimeter called ARC.The curves of thermal decomposition temperature versus time,self-heating rate versus temperature,pressure versus temperature,and pressure versus self-heating rate were obtained.The thermolysis kinetics and…
It based on the requirement of structure anti-bird impact,selected typical Civil Aircraft leading edge and the aluminum alloy tilted-plate unifies structural form,adopted the ANSYS/LS-DYNA fi-nite element analysis software,analyzed the effect of tilted-plate installation angle and the connection mode on the performanc…
To study the scattering characteristics of the prefabricated multilayer fragment,the numerical simulation and the detonation drive characteristics of a certain stracture were studied for prefabricated multilayer fragment warhead.A contrast was made among the FSI model,the monolayer mesh model and the small angle model…
In this paper,chitosan-β-cyclodextrin(CTS-CD),a kind of high polymer,was synthesized by immobilizing the β-cyclodextrin(β-CD) onto the molecular structure of chitosan by the cross-linking function of glutaraldehyde.The adsorption kinetic and thermodynamic characteristics of acid dyes on CTS-CD were studied by taking t…
During the production of CD insulated HTS cables,the taping quality of polypropylene laminated paper(PPLP) insulation affects directly the electrical performance of the cable and the taping tension plays an important role in taping quality.The comparison between the wood fiber cable paper and PPLP indicated the import…