Materials Literature
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The direct internal reforming high temperature fuel cell(DIR-HTFC),using the steam reforming of methane(SRM),has great capability in dual coupling of mass and energy,and shows a broad application potential.But carbon deposition on SRM catalysts,which resulted in deactivity of catalysts,severely restricted the applicat…
The deformation behavior of Cu bicrystals with the Σ9110{221} symmetric tilt grain boundary (STGB) under pure shear has been studied by atomistic simulation method with an embedded atom method (EAM) interatomic potential. By using an energy minimization method, it shows that there are two optimized structures of this…
The dispersion polymerization of methyl methacrylate was carried out under microwave irradiation in the ethanol/water medium, which polyvinyl pyrrolidone(PVP) and 2,2′-azobisisobutyronitrile (AIBN) was used as stabilizers and initiators respectively. The morphology, size and size distribution of the poly(methyl methac…
After the PEG had been recycled from cutting fluid,the remaining waste materials were used as raw materials for this study.Both acid and alkali methods of dissolve silicon were used to recycle silicon carbide powders.Also the feasibility and conditions of two methods were studied.The results showed that when the HF co…
The development of microcellular foaming technology was introduced and the genoral feqming agent,the microcellular foaming methods were discussed in detail.Microcellular foams can be produced by batch foaming,microcellular injection molding and microcellular continuous extrusion,each method has its advantages and scop…
The hardness and microstructure of 50SiMnVB steel under normalizing,normalizing+quenching+tempering,hardening and tempering were analyzed.It is shown that the hardened and tempered 50SiMnVB steel under 860 ℃×120 min quenching(oil cooling)+600 ℃×60 min tempering(water cooling) possesses better comprehensive mechanical…
Path-plan is one of the important aspects affecting the residual stresses of arc sprayed coatings. Four types of spraying paths were designed based on an automatic arc spraying system. The 82B high carbon steel coatings were prepared by using the designed paths, and the residual stresses on the as-sprayed coating surf…
Sphere impact technique, which derives from Hertzian contact theory, is a novel method of studying mechanical properties of materials and plays an important role in the research of mechanical properties of materials. In this paper, the development and application of sphere impact theory and investigation within forty…
The aging treatment at 100 ～220 ℃ for ZK60 magnesium alloys were carried out,through analyzing microstructure,fracture scanning and testing of mechanical properties. The influences of aging temperature on microstructures and mechanical properties of ZK60 magnesium alloys were researched. The results show that the micr…
The power battery was manufactured with the commercial LiMn2O4 and graphite.Structure and morphology of the LiMn2O4 raw material were observed by XRD and SEM technique,respectively.The effects of additives such as MgO,LiF and Li2CO3 on performance were studied.The results showed that the capacity and cycling performan…
A set of online micro-observation system was made for the research of the initial bubble nucleation mechanism of the thermosetting polyurethane foam.The process parameters including stirring rate(shear stress),solid nucleating agents and the quantity of dissolved gases in the former system which will affect the foamin…
A polylactide macroinitiator(PLLA-Br) was synthesized from L-lactide through the one-step ring opening polymerization(ROP) which was catalyzed by Sn(Oct)_2,and initiated by 2,2,'2'-Tribromoethanol.The relation of the number average molecular weight(M_n) as well as the polydispersity index(PDI) of the polymer and the r…
The structure and heat dissipation of aluminum reduction cell was introduced.The heat dissipating capacity of medial part was calculated,and the heat flux and temperature were tested for the feasibility study of thermoelectric generation.The thermoelectric generator was designed and processed based on the requirements…
To evaluate the aging behavior of glass fiber-reinforced unsaturated polyester composites,an artificial accelerated aging test was carried out with the UV lamp.Scanning Electronic Microscope(SEM),Differential Scanning Calorimetry(DSC) and mechanical testing methods were used to analyze the structure and mechanical pro…
SiC modified Mg2SiO4 ceramics were prepared by hot-press sinteing process at 1 500 ℃ for 1 h. The effects of SiC addition on the sintering property, microstructure and microwave attenuation performance of the Mg2SiO4 ceramics were investigated. The mechanism of microwave attenuation of the Mg2SiO4 ceramics was primari…
A series of Ge/Si multilayer films were prepared by ion-beam sputtering technique. The effects of depositon temperature and growth interruption on the crystallinity and interfacial structure of Ge/Si multilayer films were studied. The measurement of Raman spectroscope and X-ray diffraction ( XRD) showed that the cryst…
The formation mechanism of crack defects in resin-rich areas was studied for the quartz fiber reinforced polyarylacetylene(PAA) composite.The curing characteristic and shrinkage of PAA resin were evaluated by means of differential scanning calorimetry,infrared ray,three-point bending and micrograph.Moreover,the influe…
Theoretical pick cut and principle of drawing cutting pattern were introduced.Computer program was worked out by Matlab to realize simulation for cutting process of cutting head.The cutting pattern was drawn and cutting area of each pick and its coefficient of bias load were given under different conditions.By the pro…
With characters of low phonon energy and better stability and crystallization,oxyhalide glasses could be a good matrix for the birth of nano-crystals.The forming abilities and crystallizing properties of TeO2-Nb2O5-BaO-BaCl2 glasses were investigated by FTIR,DTA,UV-Vis,FESEM.The influences of composition and network o…
There are many arguments on the methanol-to-olefin reaction as different catalysts and experimental conditions were employed by different researchers.The Carbene mechanism,radical mechanism,carbocationic mechanism and hydrocarbon-pool mechanism are the main popular mechanisms for MTO process in literatures.In this pap…