초록 ▼

Disclosed herein is a magnetic powder which can provide a bonded magnet having high mechanical strength and excellent magnetic properties. The magnetic powder has an alloy composition represented by the formula of Rx(Fe1-yCoy)100-x-zBz(where R is at least one rare-earth element, x is 10-15 at %, y i

Disclosed herein is a magnetic powder which can provide a bonded magnet having high mechanical strength and excellent magnetic properties. The magnetic powder has an alloy composition represented by the formula of Rx(Fe1-yCoy)100-x-zBz(where R is at least one rare-earth element, x is 10-15 at %, y is 0-0.30, and z is 4-10 at %), wherein the magnetic powder includes particles each of which is formed with a number of ridges or recesses on at least a part of the surface thereof. In this magnetic powder, it is preferable that when the mean particle size of the magnetic powder is defined by aμm, the average length of the ridges or recesses is equal to or greater than a/40 μm. Further, preferably, the ridges or recesses are arranged in roughly parallel with each other so as to have an average pitch of 0.5-100 μm.

대표청구항 ▼

Disclosed herein is a magnetic powder which can provide a bonded magnet having high mechanical strength and excellent magnetic properties. The magnetic powder has an alloy composition represented by the formula of Rx(Fe1-yCoy)100-x-zBz(where R is at least one rare-earth element, x is 10-15 at %, y i

Disclosed herein is a magnetic powder which can provide a bonded magnet having high mechanical strength and excellent magnetic properties. The magnetic powder has an alloy composition represented by the formula of Rx(Fe1-yCoy)100-x-zBz(where R is at least one rare-earth element, x is 10-15 at %, y is 0-0.30, and z is 4-10 at %), wherein the magnetic powder includes particles each of which is formed with a number of ridges or recesses on at least a part of the surface thereof. In this magnetic powder, it is preferable that when the mean particle size of the magnetic powder is defined by aμm, the average length of the ridges or recesses is equal to or greater than a/40 μm. Further, preferably, the ridges or recesses are arranged in roughly parallel with each other so as to have an average pitch of 0.5-100 μm. abrasive material has a first phase and a secondary phase, wherein the superabrasive material is manufactured under an ultra high temperature and an ultra high pressure process, and wherein the friction stir welding tool is capable of functionally friction stir welding MMCs, ferrous alloys, non-ferrous alloys, and superalloys; and (4) inhibiting material from adhering to the friction stir welding tool during the welding process by utilizing a superabrasive material having a low coefficient of friction. 23. The method as defined in claim 22 wherein the method further comprises the step of selecting the superabrasive material from the group of materials comprised of compounds including elements extending from IIIA, IVA, VA, VIA, IIIB, IVB, and VB on the periodic table of the elements. 24. The method as defined in claim 23 wherein the method further comprises the step of selecting polycrystalline cubic boron nitride (PCBN) or polycrystall