Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
To understand the flow stress characteristics of aluminum 7075-T651,dynamic compression tests during the temperature range of 25-400 ℃ and strain rate range of 600-12 000 s-1 were performed on cylindrical samples using SHPB technique.The results show that the flow stress of aluminum 7075-T651 is strongly sensitive to…
Mechanical properties of silicone rubber were studied by Oven accelerated aging test.Dichotomy and linear regression analysis were used for confirming relevant parameters of silicone rubber in life equation and Arrhenius equation.The tensile strength retention rate was used as aging indicators and the storage life pre…
Using the full potential linearized augment plane wave method with the generalized gradient approximation(GGA) and generalized gradient approximation plus modified Becke and Johnson potential(GGA+mBJ),the ferromagnetism and electronic structures for the Cu-doped wurtize ZnO are investigated,respectively.The GGA calcul…
Using nitrocellulose as raw material,poly-hexamethylene diisocyanate,isophorone diisocyanate and toluene diisocyanate as cross linker respectively,dibutyltin dilaurate as catalyst,acetone as solvent,nitrocellulose wet gel was prepared successfully,and nitrocellulose aerogel was prepared by supercritical fluid drying.T…
The damping rubber used in oil-stain situations requires oil-resisting property.In this paper,the physical properties of NBR/NR rubber isolator with different ingredients and oil-soaking time in IRM 903 were analyzed experimentally.The damping effect of the rubber isolator after the oil-soaking was measured.It was fou…
To establish the equivalent of perforating through ceramics and 603 steel,based on the residual penetration rule,the equivalent factor of the thickness ratio between 603 steel and ceramic impacted by rod armor-piercing projectile was introduced. The penetration process of rod armor-piercing projectile into ceramic com…
In order to assess the explosion risk of aluminum powder comprehensively,the influence of humidity on aluminum powder explosion is studied in a explosion tank.The maximum explosion pressure and the maximum pressure rise rate of aluminum powder explosion were obtained at the relative humidities of 33%,60% and 90%,respe…
At the current density of 1-13 A/dm2,Ni coatings were prepared by moving-cathod electroplating technology.The effects of current density on surface morphology,crystallization orientation,porosity,internal stress and microhardness of Ni electroplating were investigated by scanning electron microscopy(SEM),X-ray diffrac…
Adsorption removal of basic nitrogen compounds in the shale diesel with USY molecular sieves was investigated.The effect of adsorption time,temperature and adsorbent/oil weight ratio on the nitrogen removal rate was studied,and found that highest nitrogen removal rate(30.73%) are obtained under the following condition…
Internal thread formation by cold extrusion based on low-frequency vibration can realize vibration extrusion by extruding tap.It can turn the process of dry friction into a more favorable state of boundary friction.Therefore it can overcome the defect of traditional cold extrusion that the coolant cannot easily enter…
The structure of a new divertor cooling module is introduced for EAST superconducting tokamak.By using the FLUENT finite elemente software,the steady state thermal analysis was performed for the model with different parameters so as to quantifictional study the change rule the heat exchanged capacity with its paramete…
On account of difficulty in finding magnetizing inductance when the transformer is no load and secondary-side voltage and current data are unknown, a method is put forward to solve magnetizing inductance of transformer based on hysteresis loop of dispersed data point. The concrete step is as follows. Firstly, accordin…
Magnesium alloy AZ31B and Cu dissimilar metals were bonded by the transient liquid-phase diffusion bonding(TLP) process.The microstructures and properties of AZ31B/Cu TLP bonded joint were researched by SEM, micro-hardness test and XRD.The results show that under the condition of 500 ℃,40 min and 2.5 MPa,the diffusion…
Pollution layer on insulator surface may change under surface discharge activities during the long-term running of insulators,which influences the contamination characteristics of the insulators.In order to investigate these influences,on the basis of discharge simulation experiments on insulator surface,we studied th…
Fe-Cr-Si-B-C composite coatings were fabricated on 45 medium carbon steel substrate using electromagnetic control assisted laser cladding process.The microstructure,phase composition,friction and wear behaviors of the composite coatings were investigated by X-ray diffraction,scanning electron microscopy,energy dispers…
Based on the metal magnetic memory testing(MMMT),the relationship between the magnetic memory signals and the stress concentration degree for Q235steels static tensile test under different conditions are investigated.Then the magnetic domains at different points with various stresses on the sample are observed.The res…
The uniaxial compression experiments were conducted on 120specimens with the size of 70.7mm×70.7mm×228.0mm for hybrid fiber-reinforced reactive powder concrete(RPC)after being exposed to 20-900℃.The effects of fiber content and exposure temperature on the mechanical properties of RPC were investigated,including the un…
The Sb3 +,Bi3 +,Zr4 + and Si4 +doped YAG ∶Ce yellow phosphors were synthesized by high temperature solid-state method.The doping effect and the related mechanism of Sb3+,Bi3+,Zr4+ and Si4+ on the luminescence intensity of YAG ∶Ce were studied.The results show that the luminescence intensity firstly increases with the…
The environment of the indoor substation achieves the integrated control of the temperature,the humidity and the poisonous gas SF6 by combing the exhaust equipment with the air conditioning and refrigeration.Mathematical models of the temperature and the humidity are built according to the integrated factors of indoor…
High-resolution X-ray tomography technology was adopted to analyze inner structural features of multi-directional braided carbon / carbon composites.The tensile property and failure mechanism of this material at room temperature were also studied. Results show that the fiber tows of 4-D C / C composites have improved…