Materials Literature
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The theory of thermal conduction of ceramic materials and thermal conductivities of current thermal barrier coatings were reviewed to increase further thermal insulation of plasma sprayed thermal barrier coatings.The methods of increasing thermal insulation of plasma sprayed thermal barrier coatings including seeking…
The new flower-like Bi2WO6 porous microspheres self-assembled by nanosheets were synthesized through a simple hydrothermal process using surfactants(CTAB,or SDBS) as the structure-directing agent.The effect of reaction time and surfactants played important roles in the morphology and size of Bi2WO6.The Bi2WO6 prepared…
Al2O3–ZrO2 composite powders(Al2O3 content of 51.74% in mass,ZrO2 content of 44.95% in mass) were synthesized by a sol–gel process using AlCl3?6H2O and ZrOCl2?8H2O as starting materials,and NH3?H2O as a precipitant.Chemical composition,min-eral phase and particle size distribution of the composite powders were investi…
A one-step electrochemical approach was employed to produce graphene dispersion with the perfect structure and excellent conductive property by exfoliation of graphite in electrolyte.Transmission electron microscopy and Raman spectroscopy were used to characterize morphology and structure of the as-prepared graphene.F…
Effects of Cu and Cr content on mechanical properties and corrosion resistance of high strength low alloy weathering steels were investigated.The experimental results indicate that there is a relatively great effect of Cu element on strength of the alloys.Yield strength of the alloys increases gradually with increasin…
Laser surface alloying with the mixture of WC particles and TA15 titanium alloy powder was employed to improve the wear resistance of titanium alloy.The laser alloyed coating was successfully fabricated with β-Ti riched W element as matrix and primary/eutectic TiC/(TiW)C phase as the reinforcement.The results show tha…
A series of waterborne polyurethanes(WPUs)with 50% solid content were prepared through a prepolymer process.The properties of the dispersion and its film were characterized by Fourier transform infrared spectroscopy(FT-IR),particle size analyzer,X-ray diffraction(XRD),differential scanning calorimetry(DSC)and tensile…
High Mn-high Nb micro-alloyed steels were investigated by electron back-scattering diffraction(EBSD) to determine the effect of cooling rate and ausforming on the characteristic of misorientation and the distribution of high angle boundaries(HABs) in low carbon bainitic microstructure.The results indicate that there i…
The corrosion inhibition performance of sodium dodecyl benzene sulfonate(SDBS) to stainless steel in simulated cooling water containing sulfide and chloride ions was investigated by electrochemical impedance spectroscopy,polarization curves and Mott-Schottky approach.The results revealed that in simulated cooling wate…
于2004-2005年间对洱海水体的硅藻群落进行逐月监测及研究,共发现71个种,分属于18个属.硅藻群落结构的季节变化显著,主要优势种为耐营养的属种.不同季节的硅藻优势种类有明显区别,冬季的主要优势种为Fragilaria crotonensis,春季Aulacoseira ambigua与F. crotonensis的组合占优势地位,夏季以Cyclotella ocellata为主,秋季则A. ambigua与Cyclostephanos dubius组合为优势种.空间上除1#点外,硅藻分布虽然在相对丰度上存在一定的南北差异,但优势属种在全湖具有较好的一致性.说明洱海全湖的水质都已处于中富营养状态.对除1#点外的11个采样点的硅…
Aligned porous conductive carbon black(CB)/polyvinyl alcohol(PVA) composite is obtained through directional freeze-drying process in this paper.The result shows that the conductive property of CB/PVA composite does not obeys the universal percolation theory.The value of critical resistance exponent is not in the range…
A series of supported Cu-Fe catalysts with different oxides(ZnO,ZrO2,TiO2,SiO2,MgO,Al2O3) as support were prepared by co-impregnation method,and were characterized by XRD,N2-adsorption,H2-TPR and CO-TPD.Their catalytic performances for the synthesis of higher alcohols through CO hydrogenation were investigated in a co…
The transferring characteristics of current transformers(TA) are subject to possible changes due to DC magnetic bias caused by geomagnetic induced current(GIC)/high voltage direct current(HVDC).The particularity of TA saturation affected by the DC magnetic bias will severely impact the transformer differential protect…
Work-hardening charactenstics of GH4169 alloy with different δ contents were studied by high temperature tensile test and scanning electron microscopy.The results show that the working-hardening behavior of GH4169 alloy with different δ contents fits the Hollomon hardening law.The strain hardening exponent n of the al…
Based on the former research results,the green nephrite from Taiwan has been experimented by SEM,XRD and FTIR and the experimental results are compared with the green nephrite from Canada.The results indicate that the green nephrite from Taiwan mainly consists of tremolite,small amounts of actinolite and chlorite.The…
A new natural compound,3-O-β-D-glucopyranosyl-(1→2)-β-D-galactopyranosyl-(3β,5β)-pregn-16(17)-ene-20-one(timopregnane A,1),together with five known stroidal glycosides identified as timosaponin AIII(2),timosaponin BIII(3),22-hydroxy-5β-furost-3β,15α-diol-3-O-β-D-glucopyranosyl(1→2)-β-D-galactopyranoside(4),timosaponin…
It is urgent demand for the safety of the power industry to develop an high-performance long-lasting temperature vulcanized silicone rubber coating,which is one of the most important approaches of preventing flashover.The composition characteristics of RTV silicone rubber coating and the technical requirements of the…
Iodine recovery method from the extraction raffinate wastewater of 4-bromo-2-fluorine-iodobenzene production was studied.The distribution constant of iodine extraction by benzene,cyclohexane and other five extractants and the distribution curve of iodine extraction by cyclohexane were determined under the temperature…
The main factors influencing the corrosion of low alloy steel by adding H2O2 into seawater was studied through potentiodynamic polarization curves,rotating disk electrode tests,and weight loss method.The results showed that the corrosion rate was the highest when H2O2 was 0.8 mol/L and the solution temperature was 70…
The first-principles method based on projector augmented wave pseudo-potential and generalized gradient approximation was employed to calculate the ground state properties,elastic constants and electronic structure of face-centered cubic(FCC) Fe and Fe-Cu random solid solution alloys with Cu contents of 25%,37.5% and…