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希土類元素−鉄系合金からなる超磁歪材薄片であって、該薄片の断面の組織が主として、主相であるＲＴ2相（Ｒは希土類元素、ＴはＦｅまたはＦｅを含む遷移元素の１種以上）とＲＴ2相よりもＲリッチな相からなり、Ｒリッチな相の間隔が２〜２０μｍであり、薄片の厚さが０．１〜２ｍｍである超磁歪材薄片。
A giant magnetostrictive flake composed of a rare earth element-iron-based alloy, and the cross-sectional structure of the flake is mainly an RT 2 phase (R is a rare earth element, T is Fe or a transition element containing Fe) And a magnetostrictive material flake having an R-rich phase than the RT 2 phase, the R-rich phase interval being 2 to 20 μm, and the flake thickness being 0.1 to 2 mm.
希土類元素−鉄系合金の組成をＲＴｘ（Ｒは希土類元素、ＴはＦｅまたはＦｅを含む遷移元素の１種以上、ｘは原子比）で表すとき、１．５≦ｘ≦２．０である請求項１に記載の超磁歪材薄片。
When the composition of the rare earth element-iron-based alloy is expressed by RTx (R is a rare earth element, T is one or more of transition elements including Fe or Fe, and x is an atomic ratio), 1.5 ≦ x ≦ 2.0. The giant magnetostrictive flake according to claim 1.
Ｒリッチな相の厚さが１０μｍ以下である請求項１乃至２のいずれかに記載の超磁歪材薄片。
The giant magnetostrictive material flake according to claim 1, wherein the R-rich phase has a thickness of 10 μm or less.
ＲがＴｂ及び／又はＤｙである請求項１乃至３のいずれかに記載の超磁歪材薄片。
The giant magnetostrictive material flakes according to any one of claims 1 to 3, wherein R is Tb and / or Dy.
薄片が単ロールまたは双ロールによるストリップキャスト法で得られたものである請求項１乃至４のいずれかに記載の超磁歪材薄片。
The giant magnetostrictive material flake according to any one of claims 1 to 4, wherein the flake is obtained by a strip casting method using a single roll or a twin roll.
請求項１乃至５のいずれかに記載の超磁歪材薄片を粉砕した平均粒度３００μｍ以下の粉体。
A powder having an average particle size of 300 µm or less obtained by pulverizing the giant magnetostrictive flakes according to any one of claims 1 to 5.
請求項６に記載の粉体を成形、焼結し、必要に応じ熱処理した超磁歪焼結体。
A giant magnetostrictive sintered body obtained by molding, sintering, and heat-treating the powder according to claim 6 as necessary.
超磁歪材用の希土類元素−鉄系合金の原料溶湯を単ロールまたは双ロールによるストリップキャスティング法により鋳造することを特徴とする超磁歪材薄片の製造方法。
A method for producing a giant magnetostrictive material flake, comprising casting a raw material melt of a rare earth element-iron alloy for a giant magnetostrictive material by a strip casting method using a single roll or a twin roll.
希土類元素−鉄系合金の組成をＲＴｘ（Ｒは希土類元素、ＴはＦｅまたはＦｅを含む遷移元素の１種以上、ｘは原子比）で表すとき、１．５≦ｘ≦２．０である請求項８に記載の超磁歪材薄片の製造方法。
When the composition of the rare earth element-iron-based alloy is expressed by RTx (R is a rare earth element, T is one or more of transition elements including Fe or Fe, and x is an atomic ratio), 1.5 ≦ x ≦ 2.0. The method for producing a giant magnetostrictive flake according to claim 8.
ＲがＴｂ及び／又はＤｙである請求項８乃至９のいずれかに記載の超磁歪材薄片の製造方法。
The method for producing a giant magnetostrictive material flake according to any one of claims 8 to 9, wherein R is Tb and / or Dy.
請求項１乃至５のいずれかに記載の超磁歪材薄片より得られた磁歪材を使用した超音波振動子。 An ultrasonic transducer using a magnetostrictive material obtained from the giant magnetostrictive material flakes according to any one of claims 1 to 5. 請求項１乃至５のいずれかに記載の超磁歪材薄片より得られた磁歪材を使用したスピーカー。 A speaker using a magnetostrictive material obtained from the giant magnetostrictive material flake according to any one of claims 1 to 5. 請求項１乃至５のいずれかに記載の超磁歪材薄片より得られた磁歪材を使用したアクチュエーター。 An actuator using a magnetostrictive material obtained from the giant magnetostrictive material flakes according to any one of claims 1 to 5.
JP2004045633A2003-02-212004-02-23
Giant magnetostrictive material flakes, method for producing the same, and giant magnetostrictive sintered body
Expired - Fee RelatedJP4817138B2
(en)
Ni-w-b sputtering target member for producing intermediate layer film of perpendicular magnetic recording medium, and thin film produced by using the same