Materials Literature
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The performance of the plasma facing components (PFC) and materials in fusion reactor DEMO are fundamental issues affecting the ultimate technological and economic feasibility of fusion power. Many factors influence the choice of a functional and structural material in a fusion reactor. Component lifetime is mainly li…
Deformation can lead both to increase, and to decrease the values of the magnetic susceptibility of alloys based on Ni3Al. The difference in the behavior of alloys takes place due to the different structure of the alloy as a result of the deformation. The formation of a nanocrystalline structure in intermetsllid Ni3Al…
High-temperature thermoelectric properties of BaFexTi1−xO3−δ (BFT100x) ceramics in air were investigated. Crystal structures of BFT100x ceramics were found to be a mixture of tetragonal or cubic provskite and hexagonal BaTiO3 phases for x = 0.05–0.20, and a single phase of hexagonal BaTiO3 for x > 0.30. X-ray diffract…
Polymeric micelle is one of the most fascinating nanoparticles formed by self-assemblies of block copolymers as vehicles for drug delivery system. The therapeutic effects of polymeric micelles carrying antitumor agents in cancer chemotherapy are derived from the results of their localization at tumor sites by EPR (enh…
The age of adiabatic mononitrobenzene (MNB) production began with a meeting held in July 1974 at the Canadian Industries Ltd. (CIL) Explosives Research Laboratory in McMasterville, Quebec, Canada. Two senior scientists of the American Cyanamid Company disclosed the adiabatic MNB concept, and invited CIL to contribute…
Fluorescent nanodiamonds containing nitrogen vacancy centers are created by electron irradiation. The values of spin echo coherence time T2 of nitrogen vacancy centers in nanodiamonds are very small, which are between 0.86 s and 5.6 s. The results of Ramsey interference fringes show that the values of dephasing time T…
A new integral multi-explosively formed penetrator( MEFP) warhead is designed in order to improve the hit probability of explosively formed penetrator( EFP). The feasibility of the warhead structure is verified in static blast experiment. And the processes of MEFP forming and penetrating a target are simulated using L…
A series of polycarboxylate superplasticizers(PCE) with different side chain lengths, a fixed side chain density and gradually-decreased backbone length were synthesized. The molecular weight, the molecular weight distribution and the polymerization conversion ratio were measured by gel permeation chromatograph. The r…
The streamer propagation along the insulation surface is a significant physical process during the surface flashover.Research on the streamer propagation along the insulation surface is not only helpful for understanding the process of surface flashover,but also has important significance on the design of transmission…
To obtain the natural contamination deposition characteristics of UHVDC insulators,we tested contamination deposition of full-scale insulators,in which the equivalent salt deposit density(ESDD) and the non-soluble deposit density(NSDD) were measured.A series of comparisons in ESDD and NSDD were performed based on test…
To investigate the influence of end friction on compressive strength with different specimen shapes,we present a three-dimensional particle element approach for concrete,a series of numerical uniaxial compressive tests for standard cube specimen and standard cylinder specimen are conducted. The material properties are…
A series of catalysts were prepared by calcination of copper(II) hydroxide and pseudo boehmite with a Cu/Al molar ratio of 1/2.When the calcination temperature was raised from 500 ℃ to 900 ℃,the main component of the catalysts varied from CuO to CuAl2O4,and the catalyst surface area declined from 75.0 to 16.6 m2/g.The…
By means of in situ emulsion copolymerization,core-shell silica hybrid particles with poly(MMA-co-BA) shells were fabricated,which were subsequently compounded with isotactic polypropylene(PP) in the molten state to prepare SiO2/PP composites.The non-isothermal crystallization kinetics of SiO2/PP composites was invest…
The BN-based composite ceramics were fabricated with BN, SiO2 and AlN as raw materials by an hot-press sintering process. The effect of AlN content on the phase constitution, microstructure and mechanical properties of the composites was investigated. The results show that SiAlON can appear in the composites sintered…
During the process of exploring new high-performance magnetostrictive materials,Fe-Ga alloy was an important discovery with high stress sensitivity,good thermal-mechanical properties and magnetostrictive properties.It filled the blank between the traditional magnetostrictive materials and rare earth giant magnetostric…
Image segmentation of cotton is the key step of the cotton picker robot vision system. In the complex environment of the cotton fields of the strong light, shadow, etc. accurately and effectively splitting cotton, helps to determine its position in threedimensional space. In accordance with the characteristics of cott…
Flame retardant polyvinyl alcohol(PVA) grafted with acrylonitrile(AN)(FR-PVA-g-AN) was prepared via grafting copolymerization of AN onto PVA(PVA-g-AN) using K2S2O8-NaHSO3 as initiator followed by the chemical modification reaction with phosphoric acid and urea.The structure of FR-PVA-g-AN was characterized by Fourier…
The ESR and ESR-CDS casting microstructure of the M2 high speed steel was studied.The results show that the casting' edge is dendrite and appears three times dendrite with ESR,and the structure of heart are coarse equiaxed grains,between which is network carbide,and the segregation of ingot is more serious,the matrix…
To simulate the hydrophobic microstructure of cicada wing surface,a high speed precise micromilling machine was used to fabricate columnar microstructure arrays on aluminum alloy substrate.Microstructure,hydrophobicity and surface roughness of bionic specimen were investigated,and the hydrophobic mechanism of bionic s…
A high performance Al-Al2O3 metal and oxide composite carbon-free sliding gate was prepared under carbon burial at 1 450 ℃ for 6 h via a transient plastic phase process using tabular alumina,fused white corundum,α-Al2O3 fine powder and a fine Al powder as raw materials and phenolic resin as binder.The composite sample…