Carbon-nickel

Potassium perchlorate Aluminum plus magnesium, carbon, nickel plus titanium, reducing agents, sulfur, sulfuric acid... 

Nickel chloride hexahydrate [7791-20-0] is formed by the reaction of nickel powder or nickel oxide with a hot mixture of water and HCl. Nickel duoride [13940-83-5], 4H2O, is prepared by the reaction of hydroduoric acid on nickel carbonate. Nickel bromide [18721 -96-5], NiBr2 6H20, is made... 

Nickel Carbonate. Nickel carbonate [3333-67-3], NiCO, is a light-green, rhombic crystalline salt, density 2.6 g/cm, that is very slightly soluble in water. The addition of sodium carbonate to a solution of a nickel salt precipitates an impure basic nickel carbonate. The commercial material is the basic salt 2NiCo2 3Ni(OH)2 4H20 [29863-10-3]. Nickel carbonate is prepared best by the oxidation of nickel powder in ammonia and CO2. Boiling away the ammonia causes precipitation of pure nickel carbonate (32). 

Nickel Arsenate. Nickel arsenate [7784-48-7] Ni2(As0 2 8H20, is a yellowish green powder, density 4.98 g/cm. It is highly iasoluble ia water but is soluble ia acids, and decomposes on heating to form As20 and nickel oxide. Nickel arsenate is formed by the reaction of a water solution of arsenic anhydride and nickel carbonate. Nickel arsenate is a selective hydrogenation catalyst for iaedible fats and oils (59). 

SAE is the Society of Automotive Engineers. AISI is the American Iron and Steel Institute the XX after the designation is left open for carbon content, thus 3110 equals a 0.10% carbon, nickel-chromium steel, and ia this case XX = 0.10. 

At temperatures above 300°C, low-carbon nickel (0-02% C) is preferred to avoid the possibility of intergranular attack developing after long exposure if material of higher carbon is employed it should be annealed after fabrication and before exposure to caustic alkalis to prevent stress-assisted intergranular corrosion. 

Nickel 200 Caustic alkalis, high concentrations and high temperature IG 1. Stress-relieve after fabrication 2. Use low-carbon nickel (0 02% C max.)... 

It is well-established that electroreduced nickel(I) complexes of cyclam and a variety of substituted cyclams add oxidatively to alkyl halides to give alkylnickel(III) complexes in organic solvents,251,276 the lifetime of the carbon-nickel bond governing the overall behavior of the system. However, it was shown that [Ni (tmc)]+ (one-electron reduced form of complex (17) tmc= 1,4,8,11-teramethyl 1,4,8,11-tetraazacyclotetradecane) reacts with alkyl chlorides in aqueous alkaline solution in a one-electron process.277,278... 

Diets containing nickel carbonate, nickel chloride, or nickel sulfate cause reduced growth, disruptions of food intake and thyroid function, and emphysema and pneumonia in calves, dogs, mice, or rats. 

As seen from Scheme 7.2, the epoxy-ring cleavage and nickel oxidation proceed simultaneously. The nickel-oxygen bond is formed. This results in the formation of the carbon-nickel biradical in which Ph-CH fragment can rotate freely. The cleavage of the (NiO)-C bond leads to the formation of a mixture of styrenes. At early reaction stages (30 min), cis and trans olefins are formed in 50 50 ratio. After a prolonged contact (30 h), when all possible transformations should be completed, the trans isomer becomes the main product and cis trans ratio becomes 5 95. Such enrichment of the mixture with the trans isomer follows from the formation of the di-P-(trimethylsilyl)styrene anion-radical and its isomerization. The styrene formed interacts with an excess of the nickel complex. 

Nickel is a silver-white, lustrous, hard, malleable, ductile, ferromagnetic metal that is relatively resistant to corrosion and is a fair conductor of heat and electricity. Nickel is a ubiquitous trace metal that occurs in soil, water, air, and in the biosphere. The average content in the earth s crust is about 0.008%. Nickel ore deposits are accumulations of nickel sulfide minerals (mostly pentlandite) and laterites. Nickel exists in five major forms elemental nickel and its alloys inorganic, water-soluble compounds (e.g., nickel chloride, nickel sulfate, and nickel nitrate) inorganic, water-insoluble compounds (e.g., nickel carbonate, nickel sulfide, and nickel oxide) organic, water-insoluble compounds and nickel carbonyl Ni(CO). ... 

Compounds Nickel carbonate nickel oxide nickel subsulfide nickel sulfate... 

NTP Caneer classification Nickel and certain nickel eompounds (nickel acetate, niekel carbonate, nickel earbonyl, nickel hydroxide, niekelocene, nickel oxide, niekel subsulfide) reasonbly antieipated to be eareinogerts DHHS 1994... 

Low carbon, nickel, molybdenum chromium alloy ASTM B 564, UNS N10276 (forgings) ASTM B 574, UNS N10276 (bar and rod) ASTM B 575, UNS N10276 (plate, sheet, and strip) ASTM A 494, Grade CW-2M (weldable cast)... 

Fig. 6. Image sequence of a growing carbon nanofiber (movies are available as supplementary information to Reference (52) and can be found in Reference (57)). Images (A)-(H) illustrate one cycle in the elongation/contraction process. Drawings are included to guide the eye in locating the positions of mono-atomic nickel step edges at the carbon-nickel interface. The images are acquired in situ with CH4 H2 = 1 1 at a total pressure of 2.1 mbar with the sample heated to 809 K. All images were obtained at a rate of 2 frames/s. Scale bar = 5 nm. Reprinted with permission from Reference (52).

Fig. 7. Growth mechanism of graphitic carbon nanofibers. The illustration highlights the observation of spontaneous nickel step edge formation at the carbon-nickel interface. The observations in Reference (52) are consistent with a growth mechanism involving surface transport of carbon and nickel atoms along the graphene-nickel interface.

It has been shown experimentally that ethene combines exothermically (AH° = —60 kcal mole-1) and reversibly with a metal surface. Although the precise structure of the ethene-nickel complex is unknown, the bonding to nickel must involve the electrons of the double bond because saturated hydrocarbons, such as ethane, combine only weakly with the nickel surface. A possible structure with carbon-nickel cr bonds is shown in Figure 11-1. 

Tungsten carbide has also been used as an AP core and gives much superior penetration. It is produced by alloying tungsten with carbon, nickel, cobalt, or other elements. Tungsten carbide is about twice as dense as steel and about 1.4 times denser than lead. It is nonmagnetic and extremely hard. Analysis of such a core yielded the following results ... 

NOTE Other standard specifications exist for iow carbon, manganese, molybdenum, columbium and low carbon, nickel, chromium, molybdenum, and copper high-yield strength steels. 

Rogachev, A. S., Shkiro, V. M., Chausskaya, I. D., and Shvetsov, M. V., Gasless combustion in titaniura-carbon-nickel system. Combust. Explos. Shock Waves, 24,720 (1988). 

Where samples need ashing, low-carbon-nickel trays are adequate for the ashing operations. However, other trays lined with thin-sheet aluminum, which is discarded after each use, may be entirely satisfactory. Trays are easily cleaned with detergents of dilute mineral acids (usually HCl). The temperature for dry-ashing varies but an upper limit of 450°C is recommended. If the sample is not completely dry at the start, an... 

Stainless steel Iron, carbon, nickel, chromium Tableware, kitchenware... 

The initiation step of polymerization was studied using the stoichiometric reactions of the (PPh3)CpRNi(II) complexes 3 with isocyanides (Scheme 8) [17, 18]. Insertion of the isocyanides into the carbon-nickel... 

The competitive adsorption of metal ions is dependent on both the metal ions and the adsorbent, its magnitude being related to the adsorption mechanism. In the case of competition between metal ions for the same adsorption sites, it has been shown that the favored metal ion is that which presents the faster adsorption kinetics on the same activated carbon in a monocomponent solution. This is the case for the adsorption of Cu(II) and Pb(II) onto activated carbon cloths [17]. When metal ions present in solution do not interact with the same adsorption sites, the removal of both ions is not affected compared with monocomponent adsorption. For example, in a study performed with different activated carbons, nickel removal was not affected by the presence of cadmium, because the sites that interact with nickel do not strongly interact with cadmium [18]. Finally, due to the strong relationship that exists between the metal ion adsorption mechanism and pH (see Section 24.2.1.4), it as been demonstrated that competitive adsorption is also influenced by pH [19],... 

Nickel ammonium sulfate Nickel carbonate Nickel compounds, inorganic Nickel sulfate Nuclear cores, inorganic Nuclear fuel reactor cores, inorganic Nuclear fuel scrap reprocessing... 

Abstract DC co-sputtered Carbon-Nickel and Carbon-Nitride-Nickel thin films were... 

Key words Carbon-nickel, CNx-nickel, nanocomposites, mechanical properties, structure... 

Two possible mechanisms are outlined in Scheme 2. Insertion in the allylic C-O bond to form a 7t-allylic nickel alkoxide would be followed by reduction of the carbon nickel bond (path a). An alternative sequence involves a hydronickela-tion of the complexed olefin followed by a P-elimination of the oxygen bridge (path b). 

---