Materials Literature
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Accelerated corrosion test are carried out for reinforcing steels corroded in concrete by electrochemical method.Mechanical performance of corroded reinforcing steel way studied,through the load experinment of concrete members with corroded reinforcing steel.The influences of reinforcement corrosion on stiffness and l…
Bamboo leaves were soaked in 15% (mass frac-tion) H2SO4,and the resulting extracted fluid was formulated asinhibitive solution for 0235 carbon steel.The effects of the soa-king time and concentration of extracted fluid of bamboo leaves onthe corrosion behavior of 0235 steel in sulfuric acid were investi-gated by using…
Pyrochlore ceramics with formula (Bi1.5Sr0.5)(M1.5Nb0.5)O7(BSMN,M=Sn4+、Zr4+) were prepared by the traditional solid-state reaction method and systematically investigated. X-ray diffraction (XRD)revealed that pure cubic pyrochlore structure were formed for both samples. New high frequency dielectrics, differed by tetra…
The effects of modification on mechanical properties of AlSi7Cu2Mg alloy were investigated.The key influential factors on mechanical properties were determined by orthogonal test.The results show that the influential orders of Sr content,temperature of aluminum melt and standing time on the mechanical properties of th…
The mixed precipitant of NH4HCO3+NH3·H2O with different mixture ratio is used to synthesize YAG∶Ce phosphor by precipitation method.The optical properties and morphology are characterized by excitation spectrum,emission spectrum,X-ray diffraction(XRD) and transmission electron microscope(TEM).The results show that the…
Porous β-sialon/ Si3N4 ceramics were fabricated by resintering after reactive sintering at 1 300 ℃ for 2 h with a pressure of 0.25 MPa using Si powder and Al2O3 hollow sphere as raw materials. X-ray diffraction analysis proves that the phase compositions of the samples resintered at 1 300 ℃ for 2 h in nitrogen gas are…
The review summarizes the up-to-date aspects and application of polysiloxane-based high-temperature resistant adhesives,and the development trends are also mentioned.
The dehydrogenation performances of as-received,ball-milled and different amounts of TiF 3 doped LiAlH4 were investigated by X-ray diffraction(XRD) ,Fourier transformed infrared spectrometer(FTIR) and thermogravimetry(TG) measurements.It was found that LiAlH 4 decomposes a little during ball milling in the presence of…
The synthetic magnesium aluminum silicate gelatin/PEO system and its effect on retention rate were studied in this paper, and the comparison on retention effects between the gelatin/PEO system and PEO-attapulgite, PEO-bentonite systems was carried out.The results indicate that when the PEO charge is 0.16kg/t, syntheti…
A three-dimensional finite element model of diamond coating on cemented carbide milling cutter in a CVD system was created and the gas flow field was simulated.It shows that proper distribution of inlets is a particularly important factor for obtaining a uniform gas flow field.On this basis,some CVD diamond coated cem…
OBJECTIVE To evaluate DNA damage induced by silver nanoparticles in human liver cell lines HL-7702.METHODS Human liver cells HL-7702 were treated with silver nanoparticles and silver microparticles 10,25,50,100 and 250 mg·L-1 for 24 h,respectively.DNA damage was detected by single-cell gel electrophoresis.CASP softwar…
Compensating shim is an important part of freely loaded solid rocket motor(SRM).Based on X-ray real-time radiography technique(RTR),dynamic process of compensating shim in ignition impulsion was observed.A series of continuous photographs captured from RTR system were all processed by means of image-enhancement techni…
Wheat straw and gypsum were used as raw material to press straw/gypsum composite.The effects of the size of wheat straw particles,particle/gypsum ratio,the content of PVAc and pretreatment method on the composite properties were studied.Bonding condition between straw and gypsum was observed by stereo microscope and s…
Polyaniline(Pani) doped with phosphoric acid was synthesized on stainless steel by electrochemical method and the eigenstate Pani was prepared by immersing the doped Pani in 1 mol/L NH_4OH for 4h.The doped pani and eigenstate Pani were characterized by scanning electron microscopy and fourier transform infrared spectr…
The relationship between inclusions and the microstructure of the simulated weld-heat-affected zone (HAZ) in a microalloyed steel as well as low-temperature impact toughness was investigated.The results show that inclusions in the steel are mainly Ti 2O 3-Al 2O 3-MnS,these complex inclusions are well distributed and t…
In order to compare and analyze the shock wave sensitivity of a new aluminum explosive,the initiation behavior of two aluminum explosives(HL-10-L-1 and HL-109-L-1)under long period and low value impulse loading were studied using big gap test and numerical calculation.The critical gap thickness and ∫p2dt of nondetonat…
The effects of blending ratio of ACM/epichlorohydrin rubber(ECO) on the properties of ACM/ECO blends were investigated.The results showed that,as the addition level of ECO increased,the MH of ACM/ECO blends increased,the tensile strength and elongation at break decreased,tear strength and Shore A hardness increased,ho…
As a new deposition technology providing high ionization rate of sputtering materials and depositing dense films of high performance,the high-power pulsed magnetron sputtering(HPPMS) technology has been investigated in many countries.In this work,we prepared a series of CrN_x films using high-power pulsed unbalanced m…
β-SiAlON with a lot of slender cylindrical whiskers,has been synthesized by carbonthermal reduction-nitridation method form Coal gangue and carbon black at 1800 K. FESEM photographs showed that diameter of β-SiAlON whisker is 120-220 nm and length in the majority is about 1.5-5 μm. The VLS (vapor-liquid-solid) and VS…
A styrene-butyl acrylate copolymer was synthesized using potassium persulfate (KPS) as initiator by semi-continuous soap-free emulsion polymerization technique under a emulsifier concentration that was lower than its critical micelle concentration(CMC).The influence of pH variation,which resulted from the decompositio…