Nickel-iron type

In addition, molybdenum has high resistance to a number of alloys of these metals and also to copper, gold, and silver. Among the molten metals that severely attack molybdenum are tin (at 1000°C), aluminum, nickel, iron, and cobalt. Molybdenum has moderately good resistance to molten zinc, but a molybdenum—30% tungsten alloy is practically completely resistant to molten zinc at temperatures up to 800°C. Molybdenum metal is substantially resistant to many types of molten glass and to most nonferrous slags. It is also resistant to hquid sulfur up to 440°C. 

The treatments used to recover nickel from its sulfide and lateritic ores differ considerably because of the differing physical characteristics of the two ore types. The sulfide ores, in which the nickel, iron, and copper occur in a physical mixture as distinct minerals, are amenable to initial concentration by mechanical methods, eg, flotation (qv) and magnetic separation (see SEPARATION,MAGNETIC). The lateritic ores are not susceptible to these physical processes of beneficiation, and chemical means must be used to extract the nickel. The nickel concentration processes that have been developed are not as effective for the lateritic ores as for the sulfide ores (see also Metallurgy, extractive Minerals recovery and processing). 

Electrochemistry and Kinetics. The electrochemistry of the nickel—iron battery and the crystal stmctures of the active materials depends on the method of preparation of the material, degree of discharge, the age (Life cycle), concentration of electrolyte, and type and degree of additives, particularly the presence of lithium and cobalt. A simplified equation representing the charge—discharge cycle can be given as ... 

The metal plates to be coated with Raney nickel were type 304 stainless steel. Plate surfaces were prepared by sand blasting with an iron-free... 

Figure 2 shows the SEM image of the flake at a magnification of 350 x, as it was mounted on the conductive carbon tape. If there is a polymeric film covering the sample, the SEM will only show the surface topography of the film, not the structure residing below the polymeric film. EDS was conducted on two areas on the sample as indicated in Figure 2. The EDS analysis was conducted in square spot mode, approximately 1 pm by 1 pm in size. The elemental results are shown in Table 2. Based on these data sets it is apparent that the Type A defect is an iron-rich particle. Based on the lack of chromium or nickel the Type A defect is a particle of steel, not stainless steel.

M-type ferrites as, 11 85-87 nickel-iron alloy, 17 101 plate, 15 441... 

The nickel-based systems include the flowing systems nickel—iron (Ni/Fe), nickel—cadmium (NiCd), nickel—metal hydrides (NiMH), nickel—hydrogen (Ni/ H2), and nickel—zinc (Ni/Zn). All nickel systems are based on the use of a nickel oxide active material (undergoing one valence change from charge to discharge or vice versa). The electrodes can be pocket type, sintered type, fibrous type, foam type, pasted type, or plastic roll-bonded type. All systems use an alkaline electrolyte, KOH. 

As is well known, starting in 1923, Franz Fischer, Tropsch et al. developed the synthesis of hydrocarbons by carbon monoxide reduction to a technical process. They developed highly efficient multicomponent catalysts of the cobalt, nickel and iron type for this synthesis (43). 

Irons largely or entirely consist of nickel-iron alloys. At least some of them are probably the remains of core materials of the planetesimals that once existed in the solar system (Dalrymple, 1991, 274). Based on their chemistry, irons are subdivided into several types, which are usually identified with Roman numerals and letters (IAB, IC, IVA, etc.) Krot, Keil and Goodrich (2004) discusses a common classification system for irons. 

Accumulators shall be of the lead-acid, nickel-iron or nickel-cadmium type. For accumulators with a capacity exceeding 25 Ah (at the 5 hours rate) IEC 60079-7 and EN 50019 contain specific requirements for construction and... 

Copper-nickel alloys up 1 5 2 4 <400 Wrought, Good Good 38-62 9.3-8.5 High-iron types excellent for resisting high-velocity effects in... 

A new type of octaazamacrobicyclic Schiff bases was synthesized in high yields via a template condensation on Group 2 metal ions in ethanol at 40-50°C (Scheme 92) [196], The resultant kinetically labile complexes readily transmetallize when reacted with transition metal (cobalt, nickel, iron, copper(II)) salts to form the corresponding mononuclear [M(imBT)]X2 complexes (where X is BF4 and C104 ). 

---