Materials Literature
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The structure and hardncss of contained Cu high purity steel -0.014C,0. 10Mn,0.05Si,1.18Cu,＜0.002S,0.006P during isothermnal aging at 650 ℃ for 100 s~300 h have been tested and studied by scanning and high resolution electron microscope and HV50 hardhness tester. The test results showed that with aging at 650 ℃,the ri…
Based on elastic-plastic and thermal-mechanical couple finite element method ( FEM), the hot rolling process for 72 mm Q235 steel base plate and 14 mm 304 stainless steel clad plate deforming with 11 pass and small reduction to 12 mm clad steel plate was studied and the model of temperature field has been established…
The tempering embrittlement and its overaging phenomenon (counter^segregation) of alloy steel 2.25Cr-1Mo at tempering temperature have been studied. The non-equilibrium segregation law of phosphorus in alloy steel 2.25Cr-1Mo (0.15C, 2.32Cr, 0.95Mo, 0.009P) tempering at 650 °C for 140 h was obtained with using the kine…
The effect of tempering at 100~700 ℃ on structure and mechanical properties of a new precipitation hardening stainless steel 1Cr16Ni3Cu1MoW has been studied. The test results showed that with solid solution treated at 1070 ℃ for 1 h,oil cooling,cold treated at -70 ℃ for 2 h,then aged at 485 ℃ for 2 h,the tensile stren…
The paper presents the experimental results obtained on the erosion resistance of silicone rubber (SIR) filled with 12 nm size fumed silica (nano filler) to those filled with 5 /spl mu/m size silica filler (micro filler). The ASTM 2303 inclined plane tracking and erosion test was used in the comparison as well as an i…
When a paintbrush is dipped into a pot of paint and pulled out, surface tension forces cause the individual hairs in the brush to coalesce even as the brush becomes impregnated with paint. We study a simple model of this elastocapillary interaction in the context of the surface-tension-driven vertical rise of a liquid…
Abstract The paper investigates critically the feasibility to make fire proof polymer using nanoparticles. It includes organoclay, polyhedral oligomeric silsesquioxanes (POSS) and carbon nanotube (CNT). It is shown that they can be used to make material exhibiting low heat release rate (HRR) when they undergo heat. We…
The chelate phosphine oxide ligand bis(2-(diphenylphosphino)phenyl) ether oxide (DPEPO) was used as a unit neutral ligand to prepare the complex Eu(TTA)(3)(DPEPO) 1 (TTA = 2-thenoyltrifluoroacetonate). Compound 1 has a photoluminescence (PL) quantum yield of 55.3%, which is more than the twice of the PL quantum yield…
The Fermi surface topology of the shape-memory alloy Ni0.62Al0.38 has been determined using Compton scattering. A large area of this Fermi surface can be made to nest with other areas by translation through a vector of approximately 0.18[1,1,0](2pi/a), which corresponds to the wave vector associated with martensitic p…
Measurements of the two dimensional angular correlation of the electron-positron annihilation radiation have been done in the past to detect the momentum spin density and the Fermi surface. We point out that the momentum spin density and the Fermi Surface of ferromagnetic metals can be revealed within great detail owi…
We report on the growth of heterostructures composed of layers of the high-Curie temperature ferromagnet Co-doped $(\mathrm{La},\mathrm{Sr}){\mathrm{TiO}}_{3}$ (Co-LSTO) with high-mobility ${\mathrm{SrTiO}}_{3}$ (STO) substrates processed at low oxygen pressure. While perpendicular spin-dependent transport measurement…
We demonstrate tunnel magnetoresistance junctions based on a trilayer system consisting of an epitaxial NiMnSb, an aluminum oxide, and a CoFe trilayer. The junctions show a tunneling magnetoresistance of ΔR∕R of 8.7% at room temperature which increases to 14.7% at 4.2K. The layers show a clear separate switching and a…
We propose a simple formula for fitting the electron ionization mean free paths in solids both at high and at low electron energies. The free-electron-gas approximation used for predicting electron mean free paths is no longer valid at low impact energies [(E−EF)<50eV], as the band structure effects become sign…
Abstract Natural oils and fats are emerging as a biobased alternative feedstock to conventional crude oil in the production of chemicals and transportation fuel. However, many of these biobased chemicals are not currently cost competitive with petrochemicals because of high raw material and production costs. To improv…
In this Brief Report we experimentally demonstrate a possibility to channel the near field distribution of a line source with sub-wavelength details through a layer of an electromagnetic crystal. Channeled intensity maximum having radius of $\ensuremath{\lambda}∕10$ has been obtained using an electrically dense lattic…
Our study of the adsorption of oxygen molecules on individual semiconductiong single-walled carbon nanotubes at ambient conditions reveals that the adsorption is physisorption, the resistance without O2 increases by approximately two orders of magnitude as compared to that with O2, and the sensitive response is due to…
A novel high-pressure apparatus and technique were developed to measure CO2/water/solid contact angles (theta) in situ for pressures up to 204 bar. For two glass substrates with different hydrophilicities, theta increased significantly with CO2 pressure. As the pressure was increased, an increase in the cohesive energ…
We have studied theoretically optical reflection spectra from the Bragg multiple quantum well structures. We give an analytical explanation of the presence of two special frequencies in the spectra at which the reflection coefficient weakly depends on the quantum well number. The influence of the exciton nonradiative…
The wide-angle scattering of X-rays by anisotropic powders of nano-layered crystallites (nano-stacks) is addressed. Assuming that the orientation distribution probability function f of the nano-stacks only depends on the deviation of the crystallites' orientation from a fixed reference direction, we derive a relation…
We have modified Landau-Khalatnikov approach and shown that both the polar lattice and the screened charged defects determine the response of disordered ferroelectric-semiconductors. This system exhibits the spatially inhomogeneous switching under the external field while Landau-Khalatnikov model describes homogeneous…