JPS583294A - High magnetostrictive material - Google Patents

Abstract

PURPOSE:To obtain a high magnetostrictive material having large magnetic strain by containing as ingredients rare earth metals, Fe, Co, Ni and metalloid element as components. CONSTITUTION:A high magnetostrictive material represented by chemical composition of RxTyMz, where 4<x<35, 25<y<77, 0.05<z<=5, x+y+z=100, R signifies rare earth metal elements, T signifies Fe, Co and Ni, and M signifies metalloid element such as T, B, C, Si, P and Ge is produced. For example, the rare earth metal elements, iron and metalloid were molten in various composition in Ar atmosphere, an amorphous ribbon was then produced, and the magnetic strain of the thin alloy plate was measured. Then, extremely large value has been confirmed as compared with Ni.

Description

[Detailed description of the invention] The present invention relates to highly magnetostrictive materials.

Conventional magnetostrictive materials used in ultrasonic oscillators, etc. include pure Nt, 131 Al-1 alloy, Ni-C-
Alternatively, there is N1-Cμ-Ca 7 elite.

However, the magnitude of magnetostriction of these conventional materials is...

Generally, the size is only about 50 x 10', and it has a major drawback in that it requires a huge oscillation element and a power-saving electric oscillator in order to suppress magnetostrictive vibration in the large wall.

The present invention addresses the drawbacks of these conventional materials and provides a completely new high magnetostriction material.

That is, an object of the present invention is to provide a high magnetostrictive material having a magnetostrictive value up to 50 times larger than that of a conventional material.

The high magnetostrictive material of the present invention includes rare earth metals and Pg.

The main component metal is one selected from Cm, Ni or 214 or more, and other metals include fcB, C1Si, P and Gg/
It contains so-called metalloid elements, and their composition ratio is 4 to 35% in atomic percent.
, Fa, Co, Ni, 25-77% in total, and B, C15iP and G-
One or more types selected from among the total of 105 to 5
It contains cs.

The present invention will be explained below based on examples thereof.

Example t Various rare earth elements, iron, and metalloids were prepared in BN with the compositions shown in the left column of Table 1 in Ar′ # surrounding ψ.
A master alloy was produced by melting in a crucible, and then placed in a J## nozzle to produce an alloy thin plate in the same manner as in the production of an amorphous ribbon using the so-called one-roll method.

Table 1 Note that, according to X-ray diffraction, it was confirmed that both the alloys of Examples 7 and 60 were amorphous materials.

The magnetostriction of these alloy thin plates was measured. 1 Right side of Table 1 -
As shown in Figure 8, it was found that the value was significantly larger than that of conventional materials such as Ni. Furthermore, when the effects on the mechanical coupling coefficient and Δ were also measured, it was confirmed that both of them had significantly larger values than those of conventional materials.

The invention described in detail above has a significant industrial value.

Agent 1) Middle 4 Book

Claims (1)

[Claims] t Rare earth elements Ii, Fa, C- and Nj tT
. 74, C, Si,? And, when I is a metalloid element such as G-, it is expressed by the chemical composition RzTIM (4<, <55.25<7<77゜α05<1≦5.K+Y+Z-100). High magnetostrictive material. 2. A high magnetostrictive material according to claim 1, whose atomic structure is amorphous.