Nickel core composition

Estimates of the Mars core composition by the authors listed above suggest it is made of metal plus iron sulfide, the latter varying from 29 to 44 wt.%. Abundances of siderophile (tungsten, phosphorus, cobalt, molybdenum, nickel) and chalcophile (indium, copper) elements in the mantle (Fig. 13.23) are consistent with equilibrium between sulfide, metal, and mantle silicate at high temperature and pressure (Righter and Drake, 1996). 

The alternate assembly of TALH and PDADMAC has also been performed on nickel nanorods (average diameter 65 nm, length 1.5 pm), followed by hydrolysis of TALH upon heating under reflux (Fig. 9a). Subsequent dissolution of the nickel core yielded titania-based nanotubes (Fig. 9b) [51]. This example illustrates that the LbL method offers a promising route for the preparation of nanotubes with tailored composition and wall thickness, derived from inorganic molecular precursor and polyelectrolyte assembly. Concentric nanotubes (different composition on the inside of the nanotube from that of the surface) could also be prepared via this method. 

The structure of core-shell composite particles was dien characterized by TEM. Figure 4 shows a TEM image for fully MZF coated Ni particles the dark spherical regions are die nickel cores, whereas the lighter areas are die MZF shell coatings. The MZF shell pardcle size can be seen to be 20 nm, and an electron diffraction pattern taken from a region containing only MZF... 

Figure 2 SEM micrographs of extent of composite coating of MZF shell over Nickel core as a function of...

The nickel-rlch-reflected ZFR-3 Assembly 61 has a similar core composition except the atom density of V is reduced to 0.00508 and the atom density o f is increased to 0.00505 to compensate for the higher worth of the nickel-rich reflector. The composibon of tte 8.7-ln.-thick nickel-rich reflector is Nl-0.0662 Na-0.00205 Fe-0.0066% and Cr-0.00164. This reflector is surrounded by 8.7-in.-thick blanket of composition as in Assembly 60. The experimental critical mas s is 208 kg U Including an estimated correction for excess re-jictlvlty. 

The high resistivity of Inconel 600 (11 OjtI 0 8 Dm) demanded the application of this material as a composite with a central aluminum core. The aluminum was totally enclosed in Inconel 600 so that the Inconel was only exposed to sulfur and polysulfides. In a test over more than three years, cells with a composite current collector of this kind suffered from a high capacity decline. Post-test analysis showed that Inconel sustained polysulfide attack with the formation of a duplex nickel and chromium sulfide layer on the current collector surface. 

Most modern weapons use a hollow Pu core or pit with an implosion mechanism for detonation. Also low density Pu or delta-Pu is used due to its high compressibility. Modem pits may be composites of Pu239 and U235. In view of chemical reactivity and toxic nature of Pu, it is a general practice to plate the completed pit with a thin layer of inert material-previously nickel and now gold. 

Analysis of a round of. 38 Special caliber, Smith Wesson Nyclad ammunition revealed that the cartridge case and primer cup are nickel-plated brass, no inorganic additives to the propellant were detected, the primer composition contains lead, antimony, and barium, the bullet core is antimony-hardened lead, and the bullet jacket contains traces of calcium, cobalt, titanium, and phosphorus. 

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