Download Improving the Properties of Permanent Magnets: A Study of by G. H. M. Koper, Marten Terpstra (auth.), G. H. M. Koper, PDF

By G. H. M. Koper, Marten Terpstra (auth.), G. H. M. Koper, Marten Terpstra (eds.)

The current learn enhances the learn on patents, patent purposes and different literature on infrequent earth metals established everlasting magnets through Frits Andriessen and Marten Terpstra, released by way of Elsevier utilized technology in 1989, and enhances partially the booklet on Nd-Fe everlasting magnets edited through LV. Mitchell, which was once the results of a workshop geared up through the fee of the ecu groups and held in Brussels on 25 October 1984. the adaptation among the content material of the 1st publication and that of the current examine is that the 1st is extra particularly directed to numerous varieties and compositions of alloys utilized in newly built magnets, whereas the current publication emphasises the advancements received while utilizing specific alloys. The research edited via Mitchell offers extra particularly with the commercial, actual and chemical features of infrequent earth metals dependent magnet alloys, their houses in comparison with the extra universal and classical magnets reminiscent of ferro-cobalt alloy magnets, and their purposes to numerous fields of expertise. From the current examine it has turn into obvious that there exist just a couple of patents and patent purposes overlaying a selected use of specific magnets having particular houses to a circuit, association, machine or electrical motor. This seems to be on account that each producer of such circuits or preparations making use of magnets obviously desires to hire the simplest magnets.

Show description

Read or Download Improving the Properties of Permanent Magnets: A Study of Patents, Patent Applications and Other Literature PDF

Similar magnetism books

Physics of Magnetism and Magnetic Materials

In my ongoing evaluation of the literature during this topic region, I had this e-book pulled through the library. enable me get the risks of this evaluate out of ways first. The writing kind in actual fact means that the ebook could have been collated from direction lecture notes and fabric. In lectures, fabric is gifted as part of a lecture, with loads of spoken phrases so as to add clarification and feeling to densely written notes.

Magnetism and Structure in Functional Materials (Springer Series in Materials Science)

Magnetism and constitution in sensible fabrics addresses 3 designated yet similar themes: (i) magnetoelastic fabrics equivalent to magnetic martensites and magnetic form reminiscence alloys, (ii) the magnetocaloric impression relating to magnetostructural transitions, and (iii) substantial magnetoresistance (CMR) and similar manganites.

Strongly Interacting Matter in Magnetic Fields

The physics of strongly interacting topic in an exterior magnetic box is shortly rising as a subject matter of serious cross-disciplinary curiosity for particle, nuclear, astro- and condensed topic physicists. it really is recognized that powerful magnetic fields are created in heavy ion collisions, an perception that has made it attainable to check a number of excellent and fascinating phenomena that emerge from the interaction of quantum anomalies, the topology of non-Abelian gauge fields, and the magnetic box.

Liquid-quenched Alloys

Quantity 19 of crew III (Crystal and reliable kingdom Physics) offers with the magnetic houses of metals, alloys and metal compounds. the volume of data to be had during this box is so vast that numerous subvolumes are had to hide all of it. Subvolumes III/19a via III/19f deal with the intrinsic magnetic homes, i.

Additional resources for Improving the Properties of Permanent Magnets: A Study of Patents, Patent Applications and Other Literature

Example text

The treatment with an aqueous solution of an acid is conducted for removing the hydroxide of the alkali or alkaline earth metal which still remains after the treatment with water. The table on the next page shows 7 samples of powder prepared according to the process described above. 5, were heated in an argon gas atmosphere under different conditions, and cooled to room temperature. 32 TABLE HaliDI Iemp. RIID No. 5 BY OTHER MEASURES Rare earth-iran-boron permanent magnet powders can be produced by using a reduction method as an alternative to the melting method.

32 TABLE HaliDI Iemp. RIID No. 5 BY OTHER MEASURES Rare earth-iran-boron permanent magnet powders can be produced by using a reduction method as an alternative to the melting method. For example rare earth oxide powder, iron powder, ferroboron powder and cobalt powder are mixed with metal calcium or calcium hydride; the mixture is heated in an inert gas atmosphere at 900-1200 o C; and the resulting reaction product is washed in water to remove reaction by-products. It is extremely difficult to completely remove calcium oxide by water washing, and the remaining calcium oxide lowers the sinterability of the alloys, thereby deteriorating the magnetic properties of the resulting permanent magnets.

S3: hot working. heat treatmg. 55: To sufficiently perform formation, orientation and miniaturization of a RE-Fe-B magnet is also possible according to Akifumi Kanbe (KOBE STEEL LTD. 16,4) by rolling an ingot of alloy in a specified temperature range, by using a different peripheral speed rolling mill. 29 A ·c -a Sl:a\1oy melting, S2: casting, 53,55: different peripheral speed hot rolling, S4: heat treatment, S6: rapid cooling, S7: gradual cooling, a: time Referring to the drawing a RE-Fe-B alloy is melted in an Ar atmosphere, and a rectangular parallelepiped ingot is casted by using a mold.

Download PDF sample

Rated 4.68 of 5 – based on 49 votes