Permanent magnet alloy

Chromium—Cobalt—Iron Alloys. In 1971, a family of ductile Cr—Co—Fe permanent-magnet alloys was developed (79). The Cr—Co—Fe alloys are analogous to the Alnicos in metallurgical stmcture and in permanent magnetic properties, but are cold formable at room temperature. Equivalent magnetic properties also can be attained with substantially less Co, thereby offering savings in materials cost. 

Vanadium—Cobalt-Iron Alloys. V—Co—Fe permanent-magnet alloys also are ductile. A common commercial ahoy, Vicahoy I, has a nominal composition 10 wt % V, 52 wt % Co, and 38 wt % Fe (Table 10). Hard magnetic properties are developed by quenching from 1200°C for conversion to bcc a-phase foUowed by aging at 600°C (precipitation of fee y-phase). The resulting properties are isotropic, with ca kJ/m ... 

The alnicos are a very important group of permanent magnetic alloys, which are used in a wide range of applications. They are essentially heat-treated alloys of variable Fe-Co-Ni-Al-Cu composition ... 

Soubeyroux, J.L., Fruchart, D., Isnard, O., Miraglia, S., Tomey, E. (1995) Role of the (H, C, N) interstitial elements on the magnetic properties of iron-rare earth permanent magnet alloys, J.Alloys Comp. 219, 16-24. 

Permanent magnet alloys for producing magnets of high coercivity and high energy products... 

Nickel dimethylglyoxime is a bulky precipitate that is inconvenient to manipulate in amounts greater than 175 mg. The amount of nickel in a type of permanent-magnet alloy ranges between 24% and 35%. Calculate the sample size that should not be exceeded when analyzing these alloys for nickel. 

The Structure and Properties of Alnico Permanent Magnet Alloys, by R.A. McCurrie. 107... 

McCurrie, R. A. (1982). The structure and properties of alnico permanent magnet alloys. In Ferromagnetic Materials, Vol. 3. Ed. E. P. Wohlfarth. North-Holland, Amsterdam, pp. 127-88. 

Bum2] Bumm, H., Mueller, H.G., On the Coherence of Unmixing with Magnetic Hardness in Permanent Magnets Alloy of the Systems Iron-Nickel-Aluminium and Iron-Nickel-Copper (in... 

Kaneko, H., Homma, M., Fukunaga, T., Okada, M., Fe-Cr-Co Permanent Magnet Alloys Containing Nb and Al , IEEE Trans. Magn., MAG-11, 1440-1442 (1975) (Experimental, Magn. Prop.,, , 3)... 

Jinl] Jin, S., Mahajan, S., Brasen, D., Mechanical-Properties of Fe-Cr-Co Ductile Permanent-Magnet Alloys , Metall Trans. A, llA(l), 69-76 (1980) (Experimental, Meehan. Prop., 37)... 

Zhu] Zhu, F., Haasen, R, Wagner, R., An Atom Probe Study of die Decomposition of Fe-Cr-Co Permanent Magnet Alloys , Acta Metall, 34(3), 457-463 (1986) (Experimental, Phase Relations, Kinetics, 21)... 

Permanent magnet alloys, which can be either Fe- or Co-based sintered materials containing rare earth elements and, optionally, Al, Ti, and other metals, are supplied with a-BN for increased coercive force [78 to 87]. a-BN is also added to ferrite materials consisting of FOgOg, MnO, ZnO, and NiO for increased magnetic permeability [88]. 

Palladium and Palladium Alloys Applications. Palladium and palladium alloys are important constituents of catalysts of chemical reactions and automobile exhaust gas cleaning, of electrical contacts, capacitors, permanent magnetic alloys, thermocouples, and for the production of high purity hydrogen. The low thermal neutron cross section permits their use in solders and brazes of nuclear structural parts. Classical applications are jewelry and dentistry alloys. 

Platinum and Platinum Alloys Applications. Platinum and platinum alloys are important constituents of catalysts (chemistry, automotive exhaust gas cleaning, fuel cells), sensor materials (thermocouples, resistance thermometers), strong permanent magnet alloys, magnetic and magnetooptical (memory) devices, high temperature and corrosion resistant stmctural parts, and electrical contacts and connecting elements. Classical applications are jewelry and dentistry alloys. 

Table 3.1-232 Characteristic properties of technical permanent magnet alloys [1.222, p. 1053]...

Properties of Magnetic Alloys Cast Permanent Magnetic Alloys... 

Magnetic properties of mechanically alloyed rare earth permanent magnet alloys... 

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