Materials Literature
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Cateniporids as one of the groups of tabulate corals are characterized by having the chainlike corallum. They are commonly distributed in Ordovician and Silurian rocks. The criteria for taxonomy of cateniporids still have been disputed as to diagnosis and scope of genera included in this group. Based on published data…
B4C/Al composite was fabricated by pressureless infiltration.The phase and microstructure of the composite were studied by XRD,EDS,SEM,TEM and optical microscopy.The results show that,Al3BC forms on the interface of B4C and Al,connecting aluminum with ceramic toughly.AlB2 as strip crystal forms between B4C and Al,whic…
We focused on the flashover mechanism on wet contaminated composite insulator when bird streamer dropping by the insulator using iron wires,and investigated the low temperature nature of silicon rubber.We think that the contamination layer on the insulator may be saturated when unexplained flashover typically occurs.T…
The microstructure evolution of 7050 aluminum alloy plates after homogenization was studied by optical microscopy,transmission electron microscopy,hardness and electric conductivity measurements.The influence of such processing on the quenching sensitivity was investigated by different homogenization methods.The resul…
Zinc calcium phosphate conversion films were prepared via chemical deposition on AZ31 magnesium alloy.The influence of the temperature of phosphate baths on the surface morphologies of phosphate conversion films on AZ31 magnesium alloy and their corrosion resistance were investigated by scanning electron microscopy(SE…
Improving the hydrophobic property for hydrophobic membrane could make it have wider use in many areas,such as membrane distillation,membrane absorption,and so on.In this paper,we prapared the super-hydrophobic polyvinylidene fluoride(PVDF) membranes by non-solvent induced phase separation,researched the influences of…
Fe74Cr2Mo2Sn2P10Si4B4C2 flakes were prepared by water atomization and ball milling.The microwave absorbers of flakes oriented distributed were prepared by coating process and the random distributed ones were prepared by non-coating process.The effect of orientation on the electromagnetic properties was discussed.The r…
The self-inoculant with the same composition as the melt of alloy was introduced into the melt.The effects of the inoculant parameters,such as addition method,particle size,addition amount and precursor microstructure,on grain refinement were investigated.The results indicate that the grain size of AM60 alloy is refin…
The influences of Fe3+,Al3+,F -,SO42-ions on the crystallization process of ammonium dihydrogen phosphate(MAP) were studied by means of batch crystallization process.The results showed that the dopant of Fe3 +,Al3 + had siginificate effect on MAP crystallization process,which made the crystal shape changeing from pris…
Al_2O_3-Al-C slide gate plate samples were prepared using tabular alumina,alumina powder,aluminum powder,zinc powder as main starting materials and phenolic resin as a binder.The effects of zinc content on property and microstructure of Al_2O_3-Al-C slide gate plate heat treated at 450 to 1050℃were investigated.The re…
In order to study the iron loss and magnetic flux distribution of the power transformer laminated core under DC-biased magnetization working condition in HVDC,a laminated core model of product level was proposed and prototyped.The loss curves under different biased magnetic strength of the ferromagnetic material which…
Spacecrafts need release devices to realize space release function. The traditional pyrotechnic release devices have the drawbacks of high shock and contamination. NASA-developed release device with shape memory alloy(SMA) column has the disadvantages of long release lasting time and unavailability of reset. Based on…
Based on a dock of Zhapu port in Jiaxing of Zhejiang,the surface chloride concentration distribution law within the scope of 0-10 mm of concrete was compared between in underwater zone and in dry-wet cycling zone by means of experimental testing,analysis and discussion in the paper.And peak values distribution of surf…
Pozzolanic activity of polishing powder was investigated by measuring heat of hydration,chemical combined water,chemical undissolved quantity and dissolution amount by the acid dissolution method and rules of silicon ion and aluminum ion in alkaline environment.It is revealed that the speed of hydration of cement at e…
Kang is the most popular heating equipment in north rural areas.As for the old type Kang,the temperature is unevenly distributed on the bed surface,moreover,the indoor thermal environment is weak and the indoor air quality is poor.Hot-wall type Kang is with both the thermal performance of Kang and hot wall,so it can m…
In this study,life cycle assessment methodology was applied to assess two kinds of manure treatment processes in scaled cattle farms from the point of life cycle environmental impacts.By establishing and analyzing life cycle inventory of manure treatment in a certain scaled cattle farm,the results showed that the sign…
A current research status on the preparation and application of Ti(C,N)-based cermet composite is reviewed in this paper. The results indicate that the key of the research is to improve the toughness of Ti(C,N)-based cermet composite,on the other hand,reducing the content of scarce resources such as Co is important fo…
The development of the molecular simulation and the significance of molecular simulation in macromolecular material was discussed.Quantum mechanics initio,molecular mechanics,molecular dynamics simulation and Monte Carlo method were introduced The most popular sofeware of the molecular simulation was simplely introduc…
Various XLPE cable online monitoring and detection techniques were reviewed,including main insulation online monitoring(DC component method,DC superposition,low frequency superposition,tangent of dielectric loss angle method and PD online monitoring);metallic shield online monitoring(capacitive and general earthing cu…
In this paper,boron-containing KTA-304 stainless steel for slow neutron absorption and attenuation is studied by Monte Carlo method,and compared with the traditional SUS304 stainless steel.Taking into account some factors,such as processing conditions,corrosion resistance,hot ductility,etc.we may reasonably come to th…