Materials Literature
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The microstructure change of high chromium cast iron after quenching with different holding time was analyzed by optical microscope.The hardness and the impact toughness of specimen were measured.The results show that the martensite content is most in the matrix with small dispersing secondary carbides of high chromiu…
In this paper, tilting bed design scheme in which cuttings are removed easily is proposed. Then a vibration force analysis model of thin layer of scraps is built and eventually get the range of angle of bank of the bed validated by experiments,which provides a reference for the design of high-speed NC cutting machines.
Clothing pressure comfort is one of the research focuses in the current clothing engineering,and it is also one of the important indexes for evaluating clothing comfort.Firstly,this paper briefly states test and evaluation methods of clothing pressure,and then introduces the recent research progress,including theory c…
This research prepares CNT/epoxy resin composite material with in-situ polymerization method with bisphenol A and epoxy chloropropane as raw materials and CNT as reinforcing and heat-conducting filler and studies the storage stability,impact resistance,adhesive force,neutral salt mist corrosion resistance and heat dis…
Based on the mechanical heat pump dehumidification principle,combined with the drying temperature requirements of washing machine,this paper designed a type of air circulations system under low temperature for the drying cycles in cloth dryers.A simulation model was established using EES software.This paper presented…
The effects of fillers on the sulfide resistant property of epoxy-amino coatings were investigated by adding the corrosion resistant fillers,i.e.,aluminium powder and zinc oxide.The results showed that zinc oxide had much more ability to improve the sulfide resistant property of epoxy-amino coatings compared with alum…
Bacterial cellulose is a kind of natural and nontoxic nanomaterials that is synthetized by microbial fermentation. There are eight types of micro-organisms that can produce bacterial cellulose,they can produce bacterial cellulose through two ways that the static the fermentation and dynamic fermentation. Bacterial cel…
The mechanical ball milled composite powder with Cr and Al was sprayed on the surface of Q235 steel for hoisting machinery by the method of cold spraying with different process parameters,and the microstructure and salt-spray corrosion resistance of the sprayed steel were tested and analyzed.The results show that,comp…
The FetO activity(aFetO) of BF slag containing alkali was determined by the zirconia solid electrolyte battery using gas-slag-metal balance technique so as to understand the relationship between aFetO,potassium capacity(CK),sulfide capacity(CS) and the composition.The results show that the aFetO and CS increase with t…
To understand salt spray corrosion behavior and corrosion mechanism,the resistance of salt sprays corrosion for a Fe-based alloy 30Cr2Ni4MoV used in ship had been studied in the paper.The surface and section of samples corroded for different times,the corrosion products,the corrosion weight loss and corrosion ratio ha…
Crystal engineering of metal-organic frameworks(MOFs) attracted a great deal of interest in recent years due to their great potential in optical,magnetic,catalytic,and adsorptive applications.The fluorescence properties and adsorption properties were the important properties for the metal-organic framework.How to deve…
Poly(L-lactic acid)(PLLA)is synthesized from L-lactide via ring-opening polymerization(ROP)method,and the structure is characterized by Fourier transform infrared spectroscopy(FTIR).Then the polarized optical microscopy(PLM),differential scanning calorimeter(DSC)and X-ray diffraction(XRD)are used to characterize the c…
The precursors of ZnO∶Cu nano powder were prepared in PVA aqueous solution.Then the products were obtained by calcining under 500℃ for 3h.The effect of doping dosage on the photoluminescence of the ZnO∶Cu nano powder was investigated.The products were characterized by XRD,TEM and Fluorescence spectrophotometer(FS).The…
In order to prepare superhydrophobic cotton fabrics,alkylchlorosilanes were used and deposited on the cotton fabric by chemical vapor deposition,to form on the surface of the fabric a low surface energy material—polymethylsiloxane with rough microstructure,which,in combination with the tortuous structure inherent in t…
High permeability MnZn ferrite materials were prepared using oxide ceramic technology. The effect of CaO and MoO3 additives on the magnetic properties of MnZn ferrites was investigated. The addition of CaO can facilitate to form high resistance grain boundary layers, increasing the resistivity of the ferrite and signi…
The Finite Volume Method was adopted to get the N-S equation of the liquid drop formation in the axisymmetric coordinate system.With the Volume of Fluid(VOF) Method in Ansys 13.0,the drop forming process at capillary tube under the influence of gravity was simulated.The gas-liquid interfaces of the formation, change a…
A comprehensive thermodynamic analysis was made on the carbon deposition behavior for the production of substitute natural gas(SNG) through syngas methanation.The component concentrations and the equilibrium constants of ten reactions involved in the syngas methanation were calculated at different temperatures;the eff…
The reactor pressure vessel(RPV),as the second security barrier of a pressurized water reactor(PWR),is a particular important component for ensuring the safe operation and preventing nuclear leakage of nuclear power plant.In a PWR,neutron bombardment causes a microstructural evolution of reactor pressure vessel steels…
U-Mo alloy is one of candidates of metallic fuel for advanced nuclear reactor due to its good irradiation behavior.Reasonably analysis suggests that the irradiation swell of U-Mo alloy can be decreased by introducing homogenously distributed voids,because they can accommodate gaseous fission products.The process of pr…
Based on the first principle calculations,the geometry structure,electronic structure and Young's modulus of single-wall graphyne nanotubes(GNTs)are studied.It is found that GNTs are semiconductors with the direct band gap in range of 0.40eV~1.3eV.Due to curvature effects,the band gap decreases with the increase of GN…