Materials Literature
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Rib fabric with same number of wales of face and back loops features no curling whilst fabric characteristic of plain weft stitch is more easy to happen curling.By combined the above two knitting principles,a new weft knitting method is designed to produce none-curling weft knitted fabric on weft knitting machine,aimi…
Powder metallurgical Fe-2Ni-1Cu-0.6C alloy was prepared by double press/double sinter(DP/DS) processing.The existing forms and evolution of Cu3P additive and Cu powder with different sizes in material preparation,as well as their effects on microstructure and mechanical properties of the iron-based alloy were investig…
Cathode materials LaSrCu0. 7Fe0. 3O4 for solid oxide fuel cell( SOFC) were prepared by a solid state reaction. The structure and morphology of the electrodes were characterized by XRD and SEM,respectively. The results show that no reaction occurred between the electrode and the CGO electrolyte at 900 ℃ for 24 h and th…
To reduce the interface state density of SiO2/SiC interface is the crucial technical problem in research of SiC MOS device.In this paper,SiC MOS capacitors were fabricated and nitrogen plasma was used to treat the SiO2/SiC interface.Gate oxide quality was characterized by using current-voltage test.The breakdown field…
To study the fracture toughness of nitramine( in extruded and slurry cast conditions) and composite solid propellants,a non-contacting type video extensometer was applied to test solid propellant CT specimens. The fracture parameters KF for 3 samples with a thickness of 38mm were 0. 7546,0. 0812 and 0. 3368MPa·m1 /2,r…
The influences of the content,particle size of nucleating agents on the cellular morphology of PVA foams prepared by one-step compression molding were analyzed.The results showed that small particle size and proper content of the nucleating agents could generate more heterogeneous points without affecting the growth o…
Unsymmetrical pyridinyl-imine complexes of cobalt(CoL2n,n = 1,2 … 6) containing functionalities attached to the alkyl or aromatic group bonded to the imino nitrogen were synthesized and evaluated as potential catalysts for epoxidation of styrene,and their related compounds were characterized by means of elemental anal…
In this research,carboxylic functional group was introduced into the fibre backbone of peel dreg of Chinese water chestnut by succinic anhydride modification in pyridine.The adsorption capability of the modified peel dreg on Cu2+,Cd2+and Pb2+was influenced by the initial metal concentration,adsorption time and solutio…
Polyisocyanurate rigid foams were prepared using PM-200 ( the mixture of isocyanate and di- phenylmethane diisocyanate ), isocyanurate-phthalate polyether polyols ( IPPEP ) or polypropylene oxide polyol by a certain isocyanate index of 200.A comprehensive study was performed with the focus on the effect of the applica…
The effects of heat Treatment on intergranular corrosion of 5083 aluminum alloy are investigated by using metallurgical microscope,SEM,EDS.The results show that: By the annealing at 180 ℃ of sample,equiaxed grains is formed and the phase β(Mg 2 Al 3) is precipitated in the grain boundary;By the heat treatment at 350 ℃…
In this paper,the structure and process analysis of flange was performed. The degree of deformation was checked,and then a process scheme was drawn up as follows: upsetting extrusion of flange and stair as the first process then forming center hole step by step. The finite element analysis software was used to simulat…
Objective To evaluate the biocompatibility of titanium alloy before and after casting by cell culture and MTT test. Methods Three kinds of titanium alloys before and after casting were processed into wafers whose diameter was 13. 5 mm and thickness was1 mm. Extracts were prepared for cell culture after cleaning and di…
The magnetic nanosized Fe3 O4 /TiO2 composite was prepared by cladding directly nanosized TiO2 colloids on the surface of magnetic iron oxides.The structure and properties of this kind of composite were characterized by XRD,XPS,SEM,FT-IR and the multiple physical property method system(PPMS)for magnetic materials.The…
Triangular silver nanoparticles were synthesized by stepwise reduction of silver nitrate with sodium borohydride(NaBH4) and hydrogen peroxide(H2O2).Silver nanodisks were obtained by a shape transformation process via a chloride ion etching of silver triangular nanoparticles.With the increasing of chlorine ion concentr…
Microstructure and high-temperature tensile mechanical properties of Super 304H steel after ageing at 650 ℃ for different time were studied,and high-temperature tensile fracture mechanism of the aged steel was also investigated.The results show that the particles,such as Cu-rich e-phase,Nb(C,N) and M7C3 cacbides,are p…
To ensure the quality and mechanical properties of crankshaft castings,the advantages of low-pressure casting in producing crankshaft castings was analyzed,the low-pressure casting process for crankshaft castings was studied,which provides a foundation for improvjng the overall level of castings.
In view of the environmental pollution resulted from fly ash and clam-shell wastes,the feasibility of using the admixture of these two by-product and waste in cement mortar was studied.By grinding and screening,the fineness of the clam-shell powder was controlled at about 124 μm.Effects of clam-shell powders un-sinter…
According to the actual characteristics of dynamic interference,a lab simulation experiment device was designed.The effects of interference voltage,experimental time,interference duration and different frequencies at the same stray current density on the corrosion rate were studied.The influencing law of DC stray curr…
Polypropylene glycol-co-citric acid copolymer(PPGCA) were synthesized by polycondensation.Its blend with polylactide(PLA) were prepared via internal mixing.The toughening effect and its migration in PLA were compared with polyethylene glycol-co-citric acid copolymer(PEGCA).It was found that both PEGCA and PPGCA toughe…
To improve aging resistance of hot-dip galvanized low carbon aluminum killed steel sheet,the effect of coiling temperature on aging resistance was investigated by measuring aging index and internal friction of galvanized sheets.The results show that in the range of 620-710℃higher coiling temperature leads to less soli…