Characterization of internal pores in polycrystalline diamond compact after cobalt removal

Evaluation of cobalt removal from polycrystalline diamond compact in the coupling mechanism of acid leaching and electrolysis

The novel and facile electrolysis method for removing the cobalt binder phase from large diameter polycrystalline diamond compacts

Effect of ultrasound on cobalt removal from PDC in a weak acid electrolyte

In this study, an insoluble nanosponge biopolymer composite was synthesized, using a combined process of amidation reaction, cross-linking polymerization, and sol-gel method to obtain a phosphorylated multiwalled carbon nanotube-cyclodextrin/silver-doped titania (pMWCNT-βCD/TiO2-Ag). This work mainly emphasized on the removal of lead (Pb2+) and cobalt (Co2+) metal ions from synthetic and real wastewater samples using the synthesized pMWCNT-βCD/TiO2-Ag as a biosorbent. The new material was characterized by Fourier transform infrared (FTIR) spectroscopy, zeta potential, Brunauer-Emmett-Teller (BET) method, and scanning electron microscopy (SEM). Adsorption studies for the model pollutants were performed in batch mode. The effect of the solution pH, adsorbent dosage and the presence of competiting ions were investigated. The isotherm, kinetic, thermodynamic, and regeneration studies were also undertaken. The ability of the new material to effectively remove Pb2+ and Co2+ from synthetic wastewater and mine effluent samples was tested. The maximum removal capacities achieved for the removal of Pb2+ and Co2+ from mine effluent sample were 35.86 and 7.812mg/g, respectively.

Cobalt removal process from PDC with ultrasonication in neutral electrolyte

Study on cobalt removal process of polycrystalline diamond compact with high efficiency and environmental protection

Kinetics, Isotherms and Equilibrium Study of Co(II) Adsorption from Single and Binary Aqueous Solutions by Acacia nilotica Leaf Carbon

Femtosecond laser processing of cemented carbide for selective removal of cobalt

Surface treatment of AISI 52100 steel by supersonic fine particles bombarding (SFPB) was studied in this article. The surface topography, morphology of the surface layer, and microhardness distribution of the surface layer have been investigated using a surface profiler system, a scanning electron microscopy (SEM), and a microvickers hardness tester. The microstructure, phase composition, and residual stress distribution of the surface layer in AISI 52100 steel after the SFBP treatment have been characterized by means of x-ray diffraction, SEM, and transmission electron microscopy. The results showed that a nanocrystalline surface (NS) layer was formed on the top surface of the SFBP-treated AISI 52100 steel samples. The NS layer is about 2 μm in thickness with a surface roughness of Ra = 1.2 μm, Ry = 6.7 μm, Rz = 6.0 μm. Phase transitions occurred in the surface of the SFBP-treated samples. Residual compressive stress is obtained at the surface of the SFBP-treated samples. The maximum value of compressive stress appears at the outermost of the surface, and the affection region of the whole surface is about 60 μm in thickness. A hardened surface layer has been fabricated in the AISI 52100 steel. The thickness of the hardened surface layer is about 70 μm. The maximum value of hardness occurs at the depth of 20 μm from the outermost surface.

Improvement of ambient temperature tribological properties of polycrystalline diamond compact treated by cobalt removal

High-temperature annealing of polycrystalline diamond compact with cobalt removal and evolution of tribological properties of grinding balls

A Cleave-Engineered Layer Transfer (CELT) substrate was fabricated consisting of a thin InP template layer transferred, via wafer bonding and hydrogen exfoliation, onto a silicon handle wafer with a porous layer at its surface. The mechanically weak porous silicon layer enables transfer of subsequent epitaxial growth and device fabrication on the template layer by initiating cleavage through the porous layer. Structural and mechanical property changes in the porous silicon layer after various processing conditions were studied. Characterization included atomic force microscopy, high-resolution x-ray diffraction, scanning electron microscopy, and nanoindentation measurements. Atomic force microscopy and transmission electron microscopy show the template layer has high surface- and crystalline- quality for subsequent epitaxial deposition. Layer transfer capability was demonstrated on a similar structure by fracture through the porous layer.

Morphology of porous silicon layers: image of active sites from reductive deposition of copper onto the surface

Structural and photoelectrical properties of FeS2 (pyrite) thin films grown by MOCVD

A protein-bonded porous-layer open-tubular (PLOT) column has been synthesized and applied to the separation of amino acids by CEC. The porous layer was coated on the capillary inner wall by in situ polymerization of 2-hydroxyethyl methacrylate and 2-vinyl-4,4-dimethylazlactone in the presence of 1-decanol as a porogen inside a fused-silica capillary silanized with gamma-methacryloxypropryltrimethoxysilane. The azlactone functionalities at the surface of the porous polymeric support layer were allowed to react with BSA to yield a protein-bonded PLOT column. This porous layer was characterized by scanning electron microscopy and its thickness was about 1 microm. CEC on this column gave enhanced resolution of three amino acids (histidine, phenylalanine, and tryptophan), and baseline separation was achieved with 20 mM phosphate buffer, pH 8.0.