Materials Literature
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40Cr steel substrate was coated with Ti0.33Al0.67N films by Multi-arc ion technology. Analyses of substrate negative bias voltage on morphology thickness of the film, bonding strength and micro hardness and other properties. The substrate negative bias parameter designs within the scope of the existence of an optimal…
The hypereutectic HCCI/plain carbon steel bimetal composite hammer which has metallurgical combination layer were prepared by bimetal liquid casting method and the influence of the pouring temperatures on the microstructure of the hypereutectic HCCI and the combination layer were studied. The results show that lower p…
Abstract The magnetic ordering and relative structural stability (phase diagram) of La2/3Sr1/3MnO3/SrTiO3 (LSMO/STO) (001) interfaces are considered by performing generalized gradient approximation plus on‐site Coulomb correction calculations. A potential antiferromagnetic alignment between the interface layer and bul…
An orthogonal cutting model was presented，and the cutting process was simulated by a finite element software based on the thermal-elastic-plastic FEM theory and updated Lagrange method.We obtained the distributions of residual stresses in machined layer of NAK80 mold-steel.The effects of cutting speeds，cutting depths…
Mechanical alloying(MA) and field activated and pressure assisted synthesis(FAPAS) combining the method of in-situ synthesis were used for the preparing ultra-hard, super-abrasive AlMgB14 metallic ceramic. AlMgB14 was performed at 1500°C under a pressure of 60 MPa from the elemental constituents (aluminium, magnesium…
At the entrance temperature of 300°C, the effect of mill temperature on the texture and microstructure evolution was worked to 85/15 α-brass by two rollings with mill temperatures calibrated as 28°C for one rolling and 55°C for another, in which TEM was employed to reveal the microstructures, and ODF to represent the…
In this study we report on the synthesis and characterization of thermally stable polycrystalline diamond (PCD) using Ni-based alloys catalyst as a sintering aid and the B-doped diamond powder in the infiltrating way. The samples were treated at 5.6 GPa and 1200–1480 °C for 10 min in China-type cubic high pressure app…
Ultrafine silicon dioxide were modified by -NH2-teminated poly(amido-amine) (PAMAM) dendrimers to improve their dispersibility in the coatings. The modification mechanism was studied through density functional theory (DFT) in the gas phase. Virous initial configurations of ion bound to PAMAM were established to invest…
In this work the syntheses of covalently grafted Ni(II)-complexes formed with various N- or C-protected amino acid ligands (L-histidine, L-tyrosine, L-cysteine and L-cystine) inspired by the active site of the Ni-SOD enzyme are presented. Merrifield’s resin was used as support to mimic the proteomic skeleton of the en…
We report on a comparative study of thermoelectric power measurements (S(T)) in ferrimagnetic Gd4(Co1-xAx)3 compounds with A = Cu, Pt, in the temperature range 8 K – 300 K. Whereas in Gd4Co3S(T) is always negative, for x > 0 the substitution of Co for Cu/Pt gives rise to the appearance of a low temperature positive ma…
In this nanoregime attempts to bring forth nanoparticles and nanomaterials are myriads, with there interesting and demanding applications in almost every field. Today the field of nanoscience has bloomed with the confluence of nanotechnology with material science, biology, biotechnology and medicine and the need for n…
The organic-inorganic hybrid sol-gel films have been reported as an effective anti-corrosion and environmentally friendly alternative to Cr(VI) pre-treatment for aluminium alloys. The sol-gel process used to obtain these coatings allows the variation of the different synthesis parameters to achieve coatings with optim…
Compression molding is the most important making method of bonded NdFeB magnets. Characteristics of bonded NdFeB magnets are analyzed. Based on test, research and lot production practice, the important effects of mould structure, press structure and compression molding actions on magnets’ quality are introduced, The k…
Investigation of conductive polymer composites have been carried out using polypropylene (PP) and polyphenylene sulfonate (PPS) for matrix compound and graphite, carbon black and multi walled carbon nanotubes (MWCNT) for fillers. The comparison of these matrix materials with respect to the resulting electrical conduct…
Microstructural evolution and flow behavior of twin-roll cast AZ41 magnesium alloy during hot compression were characterized by employing deformation temperature of 300°C, 350°C and 400°C, and strain rate ranging from 10-3 to 10-2 s -1. When compressed at different temperature (300°C, 350°C and 400°C) and strain rate…
Nanometer europium oxide-doped titania particles were synthesized and electro-rheological fluids (ERFs) were prepared by reactions of those particles and hydroxyl silicone oil. The characteristics of particles were studied by transmission electron microscope, energy spectrum analysis and X-ray diffraction. The results…
Ni/poly(m-toluidine)(PMT) nanocomposites were prepared by in situ chemical oxidative polymerization of m-toluidine (MT) monomer in the presence of Ni powder, with ammonium persulfate (APS) as oxidant and citric acid (C6H8O7) as dopant. The resultant products were characterized by scanning electron microscopy (SEM), X-…
This paper deals with the development of submerged arc welding wires for longitudinal double submerged arc welded (LDSAW) line pipe weld through transmission electron microscopy (TEM). The experimental procedure in the paper describes the test coupons preparation for submerged arc welding (SAW) with various combinatio…
Under the conditions of the presence of surfactants and ultrasonication, the use of different cerium salt, respectively, with oxalic acid under solid state chemistry reactions, the synthesis of nano-rare earth metal complexes of cerium oxalate crystals was formed. The solid phase was characterized by powder X-ray diff…
¹̄The Ni-P-W/Al2O3 composite coatings were deposited on the NdFeB magnetic materials surface by electroless plating method. The morphology of Ni-P-W/Al2O3 coatings was investigated using scanning electron microscopy. And the X-ray diffraction was used to identify the phase constituents. The interfacial bonding strengt…