pdf effects of cobalt and nickel cobalt additions to p m

pdf effects of cobalt and nickel cobalt additions to p m

A Comparison of the Effects of Cobalt, Silicon, Nickel

effects of cobalt and silicon. Possible effects of aluminum and nickel additions on the tempering behavior of this base steel have also been investigated. The strong effects of alu-minum additions on the tempering response of low alloy steels8) are similar to those exerted by silicon additions to the same steel, which suggests aluminum may also

A Comparison of the Effects of Cobalt, Silicon, Nickel and

effects of cobalt and silicon. Possible effects of aluminum and nickel additions on the tempering behavior of this base steel have also been investigated. The strong effects of alu-minum additions on the tempering response of low alloy steels8) are similar to those exerted by silicon additions to the same steel, which suggests aluminum may also Arsenic, Cadmium, Cobalt, Copper, Lead, and Nickel Nickel causes allergic dermatitis. Suspicion of nickel carcinogenicity has focused primarily on respirable particles of nickel subsulfide and nickel oxide. 3 1.1.3 Workplace exposure 4 Arsenic is a common by-product in ores containing copper, lead, cobalt, and gold. The smelting and refining of these ores can produce arsenic fumes.

Cobalt - Iron - Nickel Request PDF

Request full-text PDF. of the ternary system iron-nickel-cobalt at 1600°C were calculated by various methods from data on the boundary binary systems. to clearly elucidate the effects of Cobalt and Nickel Stabilize Stem Cell Transcription Factor Introduction. Cobalt [Co(II)] and Nickel [Ni(II)] are capable of crossing the placenta barrier and exerting their toxicity on the animal reproduction system, thus affecting embryonic development , .Exposure of Ni(II) and Co(II) at a high concentration (100 µM) significantly reduced proliferation of inner cell mass and trophoblast cells .The reduced proliferative ability of trophoblast cells

Cobalt-Related Exposures Cobalt and Cobalt

cobalt(II) ions and (2) an indirect effect through inhibition of DNA repair (Smith et al. 2014, Lison 2015). Cobalt is one of a group of metals (transition metals, like iron and nickel) that promote oxidation and reduction (redox) reactions through transfer of electrons. In vitro studies have shown that cobalt CobaltNickel Nanoparticles Supported on Reducible Oxides Here, we report on cobaltnickel nanoparticles on reducible metal oxides as support material for enhanced performance in the FischerTropsch synthesis. For this, different cobalt to nickel ratios (Ni/(Ni + Co):0.0, 0.25, 0.50, 0.75, or 1.0 atom/atom) supported on reducible (TiO2 and Nb2O5) or nonreducible (-Al2O3) oxides were studied.

CobaltNickel Nanoparticles Supported on Reducible Oxides

Here, we report on cobaltnickel nanoparticles on reducible metal oxides as support material for enhanced performance in the FischerTropsch synthesis. For this, different cobalt to nickel ratios (Ni/(Ni + Co):0.0, 0.25, 0.50, 0.75, or 1.0 atom/atom) supported on reducible (TiO2 and Nb2O5) or nonreducible (-Al2O3) oxides were studied. Contribution of nickel, zinc and sulphur co-deposistion constant at 80°C in all test series. The ratio cobalt/Me (Me = nickel, zinc or sulphur) in the electrolyte remained unchanged in all experiments. Results and discussion Effect of cobalt concentration Figure 1 shows the effect of cobalt concentration in the electrolyte on the cathodic co

Correlation effects and effects of cobalt additions on

Jan 01, 1972 · The plot of Iogfco vs. I/T is shown in Fig. 4, and it can be eed as fco= 1.95 exp [--(3,660+ 450)/RT]. (b) Effect of cobalt additions on cobalt and nickel diffasivities in NiO The effect of cobalt concentrations on cobalt and nickel diffusivities in the crystals (Nil_,.Coc)O were determined at 2 and 1496 in air atmsophere. Correlation effects and effects of cobalt additions on Jan 01, 1972 · The plot of Iogfco vs. I/T is shown in Fig. 4, and it can be eed as fco= 1.95 exp [--(3,660+ 450)/RT]. (b) Effect of cobalt additions on cobalt and nickel diffasivities in NiO The effect of cobalt concentrations on cobalt and nickel diffusivities in the crystals (Nil_,.Coc)O were determined at 2 and 1496 in air atmsophere.

Cytotoxic effects of cobalt and nickel ions on osteocytes

Soluble metal solutions. After a 24-hr pre-culture period, the MLO-Y4 cells were treated with four concentrations of sodium (Na +), cobalt (Co 2+), chromium (Cr 3+), molybdenum (Mo 5+), and nickel (Ni 2+) chloride solutions at 0.00 (control), 0.05, 0.10, and 0.50 mM, respectively.These concentrations were chosen based upon a previous study utilizing osteoblasts in which Co and Ni at 0.50 mM Deposition of Nickel-Cobalt Alloys by Controlled DEPOSITION OF NICKEL-COBALT AllOYS BY CONTROllED POTENTIAL ELECTROLYSIS By J. L. Holman 1 and L. A. Neumeier2 ABSTRACT The Bureau of Mines is conducting research to improve technology for the recovery of strategic and critical metals, such as cobalt, nickel,

Development of aluminium-silicon alloys with improved

However, the combined additions of cobalt and nickel in other aluminium alloy systems have demonstrated a great potential to increase the mechanical properties at elevated temperature [9, 10]. Although the effect of combined addition of cobalt and nickel in hypoeutectic aluminium-silicon alloys has rarely been reported in the literature. Effect of Heat Treatment and Impurities on the Hydrogen R.J. Coyle, D.E.H. Popps, A. Mawer, D.P. Cullen, G.M. Wenger and P.P. Solan. (2003) The effect of modifications to the nickel/gold surface finish on assembly quality and attachment reliability of a plastic ball grid array (peer review version). IEEE Transactions on Components and

Effect of Nickel and Cobalt co-substitution on the

The influence of Nickel and Cobalt co-substitution on the structure and dielectric properties of barium titanate (BaTiO3) ceramics has been investigated. Nickel and Cobalt co-substituted BaTiO3 ceramics with general formula BaTi1x(Ni,Co)xO3 has been synthesized for x = 0.0, 0.02, 0.04 and 0.08 through conventional solid state reaction route. Effect of Nickel and Cobalt co-substitution on the The influence of Nickel and Cobalt co-substitution on the structure and dielectric properties of barium titanate (BaTiO3) ceramics has been investigated. Nickel and Cobalt co-substituted BaTiO3 ceramics with general formula BaTi1x(Ni,Co)xO3 has been synthesized for x = 0.0, 0.02, 0.04 and 0.08 through conventional solid state reaction route.

Effect of cobalt electroless deposition on nickel

Apr 04, 2014 · In addition, distribution of cobalt powder on the nickel hydroxide surface can be non-uniform; hence the additive cannot effectively increase the utilization of the active material. The electroless cobalt coating method has been previously employed as a technique for improving nickel hydroxide electrode performance [11] , [12] . Effect of nickel and cobalt addition on the precipitation Jun 25, 2011 · Cobalt is also an austenite-stabilizing element, similar to nickel, and therefore a decrease in cobalt content may reduce the V f of martensite and improve both the impact toughness and creep strength of 15Cr steel with nickel addition. In the present paper, the effect of combined nickel and cobalt alloying on the mechanical properties and

Effects Nickel, Cobalt, and Molybdenum Performance

Effects ofNickel, Cobalt, andMolybdenumonPerformanceof MethanogenicFixed-FilmReactorst WILLIAM D. MURRAY*AND L. VAN DEN BERG by the addition of nickel (100 nM) and cobalt (50 nM) and especially by the addition ofthese elements in combination. Molybdenum addition (50 nM) was Effects of Alloying Elements in Steel - Foundry GateCobalt Cobalt becomes highly radioactive when exposed to the intense radiation of nuclear reactors, and as a result, any stainless steel that is in nuclear service will have a cobalt restriction, usually aproximately 0.2% maximum. This problem is emphasised because there is residual cobalt content in the nickel used in producing these steels

Effects of nickel and cobalt on methane production and

Effects of nickel and cobalt on methane production and methanogen abundance and diversity in paddy soil Tianwei Wang 1, few studies investigated the effects of trace metal addition on methanogenesis. When two forms of Ni (20 mg kg1) were put in addition to acetate, Effects of nickel and cobalt on methane production and The methane production rates were significantly negatively correlated with the total cobalt and the available cobalt (r 2 = 0.983, p < 0.05 and r 2 = 0.981, p < 0.05, respectively). The mcrA gene abundance in contaminated paddy soil. The effect of nickel on the mcr A gene abundance of the methanogenic functional gene is shown in Fig. 3.

Extraction of nickel and cobalt from reduced limonitic

Dec 01, 2010 · To study the effect of AlCl 3 ·6H 2 O addition on metal extractions, experiments were carried out by varying the AlCl 3 · 6H 2 O addition from 10 to 60%wt. with the other parameters kept constant. The results show no further extraction of nickel and cobalt above 40%wt. AlCl 3 · 6H 2 O ( Fig. 3 ) but iron extraction continues to increase up Flotation of Nickel-Copper Sulphide Ore:Optimisation of optimum conditions for the flotation of nickel, copper and cobalt from a nickel-copper sulphide ore. The parameters investigated include collector dosage, percentage solids, depressant dosage and pH. The effects of these parameters at three different levels on the recovery of Ni, Cu and Co were investigated using an L 9 Taguchi orthogonal array.

Hydrothermal synthesized urchin-like nickel-cobalt

Nickel-cobalt carbonate Electrochemical sensor Nitrite abstract In this article, we present a facile and low-cost method to prepare urchin-like nickel-cobalt carbonate hollow spheres that display excellent electrooxidation of nitrite. The as-fabricated samples are charac-terized by XRD, SEM, TGA, and BET. Industrial use of cobalt as catalystcatalysts containing cobalt compounds analogous data 19 µg/m³ (0.48) Environmental emissions The risk characterisation ratio (RCR) is the quotient of the local Predicted Environmental Concentration (PEC) and the respective PNEC (Predicted No Effect Concentration) and has to be below 1

MECHANICAL TESTING 1 Effects of Cobalt and

This research investigated the effects of various cobalt and nickel/cobalt additions to P/M 304L stainless steel on oxidation behavior at 900 °C, hardness and bending strength. Note on the effects of cobalt and nickel in storage .Sn1/der Effects oj Cobalt and Nickel in Storage Battcr1:es 419 cycles of charge and clischarge were made. Two discharges of 4 hours and two charges of 8 hours were made in each 24-hour period. The results of the experiments are given in table 1. The effect of cobalt in reducing the potential of the positive plates is shown in .:figure 1.

OXIDATION OF NICKEL- AND COBALT-BASE SUPERALLOYS

We are concerned not only with the problem additions of up to 5 per cent chromium actually of oxidation of nickel- and cobalt-base alloys decrease the oxidation resistance at all tempera-under service conditions, but also with the control tures up to 1200 C (2200 F) and that further addi- Some effects of the addition of cobalt to the nickel The action of cobalt upon the characteristics of the nickel hydroxide electrode has been investigated by constant current, linear potential sweep and EDAX methods. It was found that cobalt raises the oxygen overpotential and promotes greater utilization of the active material, although major additions of cobalt were observed to lower the working potential of the electrode.

Some effects of the addition of cobalt to the nickel

The action of cobalt upon the characteristics of the nickel hydroxide electrode has been investigated by constant current, linear potential sweep and EDAX methods. It was found that cobalt raises the oxygen overpotential and promotes greater utilization of the active material, although major additions of cobalt were observed to lower the working potential of the electrode. Some effects of the addition of cobalt to the nickel The action of cobalt upon the characteristics of the nickel hydroxide electrode has been investigated by constant current, linear potential sweep and EDAX methods. It was found that cobalt raises the oxygen overpotential and promotes greater utilization of the active material, although major additions of cobalt were observed to lower the working potential of the electrode.

The effect of chromium and cobalt segregation at

Mar 01, 2018 · The nickel content in the matrix raised from approximately 47.0 at.% to 73.0 at.%, while the chromium and cobalt contents decreased from 32.0 and 16.0 at.% to 9.0 and 12.0 at.%, respectively. Interestingly, the content of nickel in the matrix after degradation is close to that of the ' precipitates. Thermodynamic studies of cobalt and cadmium additions Nickel oxide is used as the positive electrode in nickel-cadmium and nickel-metal-hydride batteries. The physical and the electrochemical effects due to the addition of cobalt and cadmium to nickel hydroxide powders are investigated. X-ray diffraction analysis shows that the d 001 value (interlayer distance in the nickel hydroxide) decreases with increase in cobalt content, while the d<SUB>100

US6409979B1 - Selective precipitation of nickel and cobalt

A method for precipitating nickel and cobalt from an acid aqueous solution containing at least dissolved nickel, cobalt and manganese, comprising adding solid caustic calcined magnesium oxide or freshly slurried caustic calcined magnesium oxide to the solution in an amount sufficient to precipitate a substantial proportion of the nickel and cobalt in solution and to precipitate a minor WO2020082019A1 - Method for synthesizing nickel-cobalt Method for synthesizing nickel-cobalt-aluminum electrodes Download PDF Info 230000002194 synthesizing Effects 0.000 title description 6; ZFIREIZCTZTOSN-UHFFFAOYSA-N [Al].[Co].[Ni] Chemical compound 1; Methods; nickel; nickel 0.000 description; 0.000 description; 6

(PDF) Effects of Cobalt and Nickel/Cobalt Additions to P/M

Oct 01, 2013 · Effects of Cobalt and Nickel/Cobalt Additions to P/M 304L Stainless Steel on Oxidation Behaviour at 900 °C and Mechanical Properties October 2013 Materials Testing Vol. 55(No. 10):748-754

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