Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The effects of quenching and tempering temperature on microstructure and properties of medium-carbon wear-resistant cast steel Cr2MnSiV were investigated. The results show that the hardness keeps higher value (54～53HRC) and the impact toughness increases significantly with the increase of quenching temperature. The im…
CoBPcN6 was synthesized by using trimellitic anhydride,pyromellitic dianhydride,urea,CoCl2·6H2O as starting materials and ammonium molybdate as catalyst in BPBF4,and then hydrolysed to CoBPcC6 under alkaline conditions.The products were characterized by IR and UV-Vis、1HNMR and elementary analysis,etc.The main factors…
Single component adhesive for rubber particle was developed with raw materials of polyether,polyester polyol,toluene diisocyanate(TDI),and ground rubber particle.Influence of type and ratio of polyol,and NCO index on the properties of the adhesives were discussed.
In this paper,three primary structures of the woollen sweater fabric were knitted on the common plat machines with acrylic yard.By changing the sinking depth,the paper researched the relationship of the loop length and surface density of three stitches fabric.By systemic testing and analysis,the linearity regress equa…
A high-energy organic potassium salt of 1,1-diamino-2,2-dinitroethlyene(FOX-7) was synthesized by mixing FOX-7 and KOH in water-methanol system.Crystal structure of K(FOX-7) ·H 2 O was determined by X-ray diffraction analysis.The crystal belongs to triclinic crystallographic system,space group P1 and cell parameters:a…
FU-800 series waterborne polyurethane leather finishing products,FU-801(soft film),FU-802(medium soft film)and FU-803(medium hard film),were prepared in industrial scale and were widely used in leather industry.In this paper,properties of the films formed from FU-800 series waterborne polyurethane leather finishers su…
According to PVC by calcium carbide is facing challenges and great pressure of energy saving and emission reduction,resource utilization and over capacity,the measures and suggestions of sustained development were put forward.
Porous silicon film samples with different pore sizes were prepared by electrochemical anodization,and then were annealed at 1050℃.The structure of porous silicon before and after annealing was observed by scanning electron microscopy and Raman spectrometry.The mechanism of pore size changes were analyzed according to…
Book recycling can not only reduce the tuition burden on students, but also reduce the consumption of resources properly thereby achieving greater efficiency of resource and reducing the waste. Book recycling mechanism has been existed in developing countries, such as European countries and USA, for many years, but ou…
It is considered that China foundry industry must have both numerous small powerful and some big and powerful outstanding foundry enterprises in order to become the foundry great-power country from the large foundry country. The technical-economic indexes which the outstanding foundry enterprise should reach and the w…
Two types of high impact polystyrene(HIPS) resins were injection molded several times to determine the changes in mechanical properties and chemical structure.After multiple injections,all the bending strength,elongation at break,fracture strength,and impact strength of the material decreased.The molecular structure o…
This article introduces the preparation of water soluble phenol - formaldehyde resin.The properties of water soluble phenol - formaldehyde resin and TSB - 1 modified starch mixed size were tested by experiments.It proves that the performance of the mixed size shows improved after added right mount of TSB - 1 in water…
According to the process characteristics of cross wedge rolling,the math model of shaping cam shaft was simplified and the rotation formula that indicated the big ending radius of spiral declined cone change with the rotation angles of rolled piece for the cam shaft was derived.The volume formula for each stage was ob…
The ground-state structures and energies of the bimetallic clusters ConCu55 - n(n = 0—55)were obtained by using the semi-empirical Gupta potential combined with a genetic algorithm. The ground-state geometries of those bimetallic clusters can be characterized by the basic Mackay icosahedron of the pure Co55 (Cu55 ) cl…
This article introduced the production processes of 20CrMnTiH gear steel by 90t converter-LF-CC-hot rolling short route.The test results for rolled products and sampling analysis in the production course showed that the gas conten(tN2 +O2)in steel was less than 60×10-6,the width of hardenability band(J9 and J15)was le…
VO2(B) powder was synthesized by reducing V2O5 powders in H2, which was prepared by inorganic sol-gel method. Then VO2(M) is obtained after annealing VO2(B) in Ar. X-ray diffraction(XRD), infrared absorption spectrum(IR) and differential thermal analysis(DTA) were employed to characterize the component and structure o…
A Fe–W–P ternary alloy was electrodeposited in an alkaline bath containing FeSO4·7H2O,Na2WO4·2H2O,NaH2PO2·H2O,Na3C6H5O7·2H2O,C6H8O7·H2O,NH3·H2O and sodium benzenesulfinate. The chemical compositions of the deposits prepared with different bath compositions were analyzed. The effects of process parameters,such as tempe…
The effect of addition of Cr_3C_2 ranging from 0 to 2% as an inhibitor of grain growth was investigated on the microstructure and mechanical properties of WC-6. 5% Co cemented carbide. The results show that WC grains can be refined because of the addition of Cr_3C_2 , while the abnormal growth of WC grains will be una…
Two different substrate materials(50CrMoV and W6Mo5Cr4V2) were strengthened by electro-spark alloying.The microstructure of the two alloyed coatings was characterized.It is found that the first main strengthening phase is the same(W2C),but the content of W2C in the coating of W6Mo5Cr4V2 significantly reduces,and the s…
A novel Λ-shaped compound DMCEM based on Trger′s base was designed,synthesized and its photophysical properties were examined in detail.DMCEM exhibited an aggregation-induced emission enhancement(AIEE) effect and emitted strong red fluorescence in solid states and faint fluorescence in the dilute solution.Nanocrystal…