Materials Literature
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Montane volcanic ash soils contain disproportionate amounts of soil organic carbon and thereby play an often underestimated role in the global carbon cycle.Given the central role of Al and Fe in stabilizing organic matter in volcanic ash soils,we assessed various extraction methods of Al,Fe,and C fractions from montan…
Anodic aluminum oxide is one of the important templates,and is widely studied and used The origin of photoluminescence from anodic aluminum oxide was discussed,and the influence of surface factors was mainly studied. Two-step method was used to prepare anodic aluminum oxide template,then the samples were treated by ar…
The oval-shaped nano-hydroxyapatite(HA) was synthesized successfully with Ca(NO3)2?4H2O,(NH4)2HPO4 as raw material by adding polyvinylprrolidone(PVP) reagent,and the crystal phase,chemical composition,morphology of HA was characterized by X-Ray diffraction(XRD) analysis,Fourier transform infrared spectroscopy(FTIR) an…
The paper analyses the cycle efficiency in alumina production with Bayer method.Combining with production practice,the producing technique conditions were presented to improve the cycle efficiency to obtain low consumption and high-yield,which is advantageous to decrease cost and increase efficiency.
PVA-based phosphate flame retardants(PVA-POH) was synthesized using polyvinyl alcohol(PVA) and phosphoric acid as raw materials.The synthesis process of PVA-POH was optimized: reacted at 100℃ for 120 min with 2.0 of molar ratio value of H3PO4 to PVA and 1% of catalyst CO(NH2)2.The structure of PVA-POH was characterize…
Research of the microstructure and texture of laser welded joints of Ti3Al based alloy plays an important role in improving the properties of the joints,while the technique of electron backscatter diffraction(EBSD) is an attractive method in the research.The quality of metallographic sample had great effect on the acc…
Perovskite-type structure La0.9Sr0.1Ga0.8Mg0.2O2.87(LSGM) as interm ediate-temperature electrolyte was prepared by the sol-gel method.It was found that the decomposition of the gel took place at 300 ℃,and the crystallized LSGM of perovskite phase was grown at 800 ℃.Particle size measurement shows that the particle siz…
The filled polyurethane elastomers were synthesized from polyol and TDI-80,with the chain extender of MOCA and inorganic fillers treated by ultrasonic dispersion and coupling reaction.The effects of different inorganic filler on the properties of the elastomer were studied.The structure and performance were analyzed b…
FeTaPt films were prepared by reactive magnetron co-sputtering on Si substrate at 800℃.X-ray difffraction(XRD) measurement revealed that the multilayer films were single phase.The time dependence of magnetization under double-field were measured and studied by Preisach hysteresis model,and we get the parameters throug…
It is important to prepare modified starch material with high toughness and hydrophobic property in an environmentally friendly way. Polyurethane prepolymer (PUP) using toluene diisocyanate (TDI) and castor oil was synthesized,and mixed reactively with thermoplastic starches (TPS) in an intensive mixer to prepare modi…
The microstructure evolution rule of austenitic and critical area in continuous cooling was studied by the analysis method of metallographic microscope and thermal expansion.The results indicate that the hardenability and critical cooling rate can be determined by the composition design of testing steel,the basic dual…
Variable nitrogen content and nickel-free stainless steel 17Cr12Mn2MoN powders were prepared by nitrogen gas atomization process and then formed by hot isostatic pressing(HIP).The effect of nitrogen contents on structure and properties of nickel-free stainless steels was investigated by SEM,EPMA and XRD et al.The resu…
Inorganic bonded solid lubricant coatings are superior to the organic bonded ones in the properties of heat-resistance.The graphite solid lubricant coatings bonded with aluminum dihydrogen phosphate were prepared by spraying method.The wear properties of the formed coatings were investigated with block-on-ring contact…
A new heavy anti-corrosion static conductive paint was prepared with chlorinated rubber as its main film forming substance,the homemade high solids content co-polyester resin as toughening resin,conductive graphite modified by silane coupling agent as conductive material.Its formula,manufacturing process and main perf…
Objective To investigate the residual stress distribution of a bilayered all-ceramic crown during the cooling process using the finite element method.Methods The 3D point picture of a bilayered all-ceramic crown was obtained through three dimentional sensing system(3DSS).Geomagic Studio8 and UG NX5 were employed to tr…
This paper introduces the research status,the properties,the development and the application in modern industries of tungsten heavy alloys.
The analysis of crack tip field is more complex in creeping materials because of the influence of rate-sensitivity.An elastic-viscoplastic constitutive model is adopted and a rate-sensitive constitutive relationship is derived for elastic-perfectly-plastic materials,under the assumption that the viscosity coefficient…
Self-organized TiO2 nanotube arrays,with highly ordered three-dimensional nanostructure,have attracted much attention in recent years due to their distinctive morphology and excellent physical chemistry function,which have become one of the focuses of nanomaterials and solar energy utilization.Widely research has been…
Magnetic stress concentration detector TSC-1M-4 was used to test 20G tubular product,and signal processing software was used to analyse test results under periodic loading.The results showed that the line of stress concentration is zero,which could not judge the point as stress concentration.Coupled with the reduction…
Response of polyaniline conducting polymers(PANI) doped with hydrochloric acid(HCl) or sodium dodecylbenzenesulfonate-HCl(SDBS-HCl) were researched respectively to tetrahydrofuran(THF) saturated vapor at room temperature.The experimental results indicated that the SDBS-HCl doped PANI film showed an excellent sensing f…