Materials Literature
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Cf/SiC composite and TC4 were successfully joined by the mixed powders of Ag,Al,Ti and short carbon fibers under vacuum condition.The microstructure of the joints was investigated by X-ray diffraction,scanning electron microscopy and energy dispersive spectrometry.The results show that the maximum shear strength is 90…
The solidification structure and mechanical properties of Al-Si7-Mg0.8 aluminum alloy modified with the Ce-rich RE by lost foam casting(LFC) were studied.The results show that Ce-rich RE can refine the grain size of eutectic silicon in the Al-Si7-Mg0.8 alloy,and reduce the alloy porosity.When the addition of RE is 0.3…
In this paper,the 3D architecture composites conducted by the quasi-static tensile test,and with the finite element software ANSYS/LS-DYNA,a calculation of the quasi-static process is preceded.In order to identify the accuracy of the calculation,a comparison is conducted between the results gotten from the tensile tes…
Factors of influencing the weatherabilities of rigid PVC products were analyzed,and the influences of calcium/zinc stabilizers on the properties of rigid PVC products were studied.
BiFeO_3(BFO) thin films with different thickness/dopants(Nd,Ce,La) were fabricated on Pt/Ti/SiO_2/Si substrate by sol - gel method.High - resolution XRD result indicates all the thin films are composed by polycrystalline BFO with no preferred orientations,and present the phase of rhombohedral. With the thickness incre…
Based on rolling technology of 11 reducing-sizing mill groups,a 3D thermal-force coupling finite element model was established for seamless steel pipe's reducing-sizing process,in which many kinds of boundary conditions were considered.The influence of temperature before reducing-sizing on the wall thickness deviation…
Silk fabrics which were pretreated by proteolytic enzyme were dyed by natural madder dyestuff.The Enzymic treatment effects on silk fabrics were evaluated by the superficial depth(K/S value) and breaking tenacity.The thesis discussed treating temperature,pH value,treating time length's impact on proteolytic enzyme's t…
Based on the review of high velocity arc spraying technology,the latest research and progress of three kinds of anti-wear thermal sprayed coatings are introduced,the performance characteristics and development direction of each coating are pointed out.This study will provide guidance for the application of anti-wear c…
This paper introduces the style features of metallic yarn denim fabric,its design idea,key points in processing design and the processing difficulties and relative counter measures in each process.The product is of high grade and high fashion.But its traditional after finishing should be readjusted due to the metallic…
Characters of nonwoven carding machine clothing was analysed.The configuration and factors effected on carding performance were elaborated.
Described are the technical parameters,structure composition and performance features of the multi-functional adjustment and repair devices for box cars.
The microstructure,surface hardness and wear capacity of NM400 steel plate during tempering at 200～600 ℃ for 1 h were investigated by SEM,TEM and EDS.The results show that the hardness and wear capacity decrease with the increase of tempering temperature,and are stable during tempering in the range of 400 ～450 ℃ due t…
The numerical simulation of high velocity long-rod projectile penetrating into finite thickness target with hydro-code AUTODYN was proposed.The penetrating process and after-working parameters were computed with Lagrange method and SPH method,which have different mesh size.The simulation results were compared with eac…
The TEG cleaning technique of final polycondensation reactor was introduced from cleaning working principle,operation process parameters,cleaning process and preparation work before cleaning.The process operation methods optimization and points for attention were pointed out.The TEG cleaning results was evaluated.
Using CCMC as raw materials,and mixed into the auxiliary strengthening agents and plasticizer of different proportion and different kinds,the different kinds of plastic film of full biodegradation were prepared.After detecting,the conclusion was that the weight of the PVE as auxiliary strengthening agents was 30% in t…
The properties of phase transition relaxation of polycrystalline Cu-Al-Ni-Mn-Ti shape memory alloy were studied in the paper.The experiment results and theoretical analyses show that the relationship of loss modulus to modulus relaxation quantity is M2=0.316δM and the semi-peak width is Δlg ωτ=1.735 in the alloy.Compa…
A catalyst Co20.0-Ni3.0/γ-Al2O3 for the synthesis of butyronitriles through the ammoniation of butanols was selected and its structure was characterized.Then,the process and the stability of the catalyst were investigated for the synthesis of butyronitriles through the ammoniation of butanols using Co20.0-Ni3.0/γ-Al2O…
The thermal decomposition analysis of coal-pharmaceutical waste sludge,coal-sewage waste sludge blends and coal-sunflower seed husk blends are studied by TG dynamic runs at the heating rate of 20 ℃/min within the temperature range of 25 ℃-900 ℃.The effect of different kinetic models on the determination of kinetic par…
To research effect of sodium dodecyl sulfate(SDS) on electrochemical behavior of electrodeposited nickel.Polarization curve and alternating current impedance spectroscopy of SDS solution electrodeposited nickel of different mass concentration are measured separately by adopting dynamic potential scan and alternating c…
Through questionnaire survey,the demand and tendency for style,design,color and performance of silk garments of various groups of consumers with different ages,sexes,and years of schooling,occupation are analyzed.Regarding the development of silk fabrics,suggestions are given such as reinforcing product research and d…