Materials Literature
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Objective: The study aimed at the surface modification of oral biomaterials(expanded polytetrafluoro-ethylene,ePTFE) by means of oxygen plasma immersion ion implantation(PIII) and evaluating its survival condition.Methods: PIII had been used to modify the surface of ePTFE membrane,and the modified ePTFE samples were i…
Metal oxide supported on activated carbon was used to remove low concentration NO at room temperature.Activated carbon was pretreated by oxidant before use.After nitrate acid treatment,both carbonyl and nitro groups on the surface of activated carbon increased,and the capacity of removing NO also increased significant…
A metal toughening azotized Si3N4-based supercharger turbine was manufactured by using hot isostatic pressing.Since the new turbine both has high strength,high thermal conductivity and low thermal expansion coefficient and other characteristics of conventional silicon nitride materials,but also to a large extent overc…
Objective To assess the biocompatibility,efficacy and safty of a self designed and manifactured novel absorbable magnesium alloy stent.Methods An absorbable magnesium alloy stent was implanted into the coronary and femoral artery of 35 hybrid dogs,respectively.The implanted stents were observed by coronary arteriograp…
Sn as an alloying element in the gray cast iron not only can strongly promote the formation of pearlite,but also refine the pearlite.When some pig iron was used to produce gray iron casting,crack or micro-cracks will form due to the excess Sn in the pig iron and this resulted in the reject of the castings.Cast iron sa…
Eight kinds of trousers' materials are chosen to make two types of trousers fit and tight.Through stress testing and data analysis,the main factors affecting the pressure of trousers on the knee,including material characteristic,trousers' fitness,and human movement state are attained.The more flexible a trousers' mate…
With maleic anhydride as raw material,hydrogen peroxide as oxidan,and sodium tungstate as catalyst,the intermediate epoxy succinic acid(ESA) is synthesized.Then,with epoxy succinate(ESA),acrylic acid(AA) and 2-acrylamido-2-methyl propane sulfonic acid(AMPS) as raw materials,and ammonium persulfate as initiator,a new t…
2,4-di-tert-butyl phenol(2,4-DTBP) was sythesized with phenol and tertiary butanol as feedstock in the presence of ultrastable Y(USY) modified by phosphowolframic acid(HPWA) catalyst in a steel-made micro-reactor.The effects of HPWA loading amount,reaction temperature,reaction time and feedstock ratio on the phenol co…
Several typical preparing conditions such as annealed temperatures,annealing atmosphere,and substrate effect on the microstructure and electronic properties were introduced emphatically.The LNO films as bottom electrode or transition layers of PLT,PZT,BST ferroelectric and BFO ferroelectromagnetic on the electronic an…
The effect of starting particle size on the mechanical properties of liquid-phase sintered Si3N4 ceramics was investigated using mill-refined Si3N4 powders and the appropriate additives.The microstructure and phase composition were determined by using SEM and XRD.The results indicate that the density,strength and hard…
This paper investigated the distribution and metabolism of nano-TiO2 and two kinds of rare-earth doped nano-titanium dioxide(nano-TiO2,Ce/TiO2 and CeO2/TiO2) in mice.The mice were treated with nano-TiO2,Ce/TiO2 and Ce-TiO2/KL powder by oral for 28 days.TiO2 in the tissues of the mice was detected by ICP-AES respective…
Based on the basic principles of biomineralization,calcium carbonate was induced by egg white protein(EWP) in the dialysis bag compartment under biomimetic conditions.The different morphology and polymorphy of calcium carbonate were characterized by SEM and FT-IR spectra.The results showed that calcium carbonates were…
Taurine layered double hydroxide(TAU-LDH) and ibuprofen layered double hydroxide(IBU-LDH) were prepared with calcinated-hydration method,by using taurine(TAU) and ibuprofen(IBU) as interlayer anions.XRD and FT-IR were used to characterize the structure of intercalation compounds.Drug release characteristics of TAU-LDH…
The stress corrosion cracking(SCC) behavior of 2024-T351 aluminium alloy in acid NaCl solution was studied by using the electrochemical noise technique.The electrochemical noise signal was recorded during the immersion test of the Wedge Opening Loading(WOL) specimen in the Zero Resistance Ammeter(ZRA) mode.The charact…
The relation of internal stress resulting from discrepancy of thermal expansion coefficient between the alloy core,glass cover layer and Young's modulus,thermal expansion coefficient,and the dimension of the glass-coated alloy microwires is investigated by analyzing of the origination of internal stress of glass-coate…
Al alloy 2E12-T3 was separately treated by Al surface-cladding,anodizing and micro-arc oxidation.An immersion corrosion test rig,a metallographic microscope,a scanning electron microscope and an X-ray diffractometer were performed to study the effect of surface treatment on the intergranular corrosion behavior and exf…
SiC coating was prepared by three technologies on graphite with the purpose of optimizing the phase structure and researching the performance of antioxidant coating.The weight loss of different samples oxidated at 1400℃ for 10h was tested.The surface and cross-section morphology images of the coating before and after…
The non-quenched and tempered CT80 grade coiled tubing steels with different composition were designed.Effects of cooling rate,coiling temperature and Mo and Nb content on microstructure and mechanical properties of the non-quenched and tempered CT80 steels were investigated.The results show that when cooling rate inc…
With the style sense-evaluation method,different components of some hemp fabrics are tested for the characteristics analysis.The works can offer useful data for improving the performance of the hemp fabrics.
Resorcinol-formaldehyde/ammonium perchlorate(RF/AP) nanocomposite with different AP contents were prepared by the sol-gel and freeze drying method and characterized by FTIR,XRD,SEM,BET and TG/DSC methods.Results show that the sol-gel process can't destroy the crystal structure of AP.When AP content is lower than 60%,w…