JP6964837B2 - 合金組成物、および、Fe基ナノ結晶合金の製造方法 - Google Patents
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Description
本発明に関する磁性部品は、例えば、本発明に関するFe基ナノ結晶合金で構成した磁気コアを用いたトランスやインダクタ、モータの磁芯などである。
本発明の実施の形態の合金組成物は、組成式がFeaVαBbSicPxCyCuzであり、79≦a≦91at%、5≦b≦13at%、0≦c≦8at%、1≦x≦8at%、0≦y≦5at%、0.4≦z≦1.4at%、0<α<5at%、および、0.08≦z/x≦0.8である。
以下に、本発明の実施の形態の合金組成物およびFe基ナノ結晶合金の実施例を示す。
まず、本発明の実施の形態の合金組成物を作製した。表1〜4の実施例1〜8に示す合金組成となるように原料を秤量し、高周波溶解により溶解した。溶解した原料を用いて、大気雰囲気中での単ロール液体急冷法により、厚さ20μm、幅10mmに調整した連続薄帯を作製し、これらを本発明の実施の形態の合金組成物とした。また、比較例として、同様の製造方法により、表1〜4の比較例1〜3の組成を有する連続薄帯の合金組成物を作製した。なお、非特許文献1に記載の(Fe85.7Si0.5B9.5P3.5Cu0.8)99C1の合金組成物を、比較例1としている。
次に、本発明の実施の形態のFe基ナノ結晶合金を作製した。実施例1〜8および比較例1〜3の連続薄帯の合金組成物から、長さ50mmの断片を切出し、それぞれ10枚重ねてアルミ箔で包んだ。それらを、赤外線ランプ加熱炉を用いて、Arガスフロー中で熱処理して、実施例1〜8および比較例1〜3のFe基ナノ結晶合金を作製した。熱処理条件は、種々の昇温速度(Heating rate;Rh)、および、種々の到達温度(Annealing temperature;Ta)で行い、設定された到達温度での等温保持時間を10分間とした。
表1に示す実施例1〜3および比較例1のFe基ナノ結晶合金の、保磁力(Coercivity)の熱処理昇温速度(Heating rate)依存性を、図2(a)および(b)に示す。図2(a)および(b)は、それぞれ到達温度Ta(annealing temperature)が420℃および430℃のものであり、これらが最適熱処理温度である。
表1に示す実施例1〜3および比較例1のFe基ナノ結晶合金の、保磁力(Coercivity)の熱処理到達温度(Annealing temperature)依存性を、図7(a)および(b)に示す。図7(a)に示すように、昇温速度Rhが300℃/minのとき、380℃〜440℃の温度範囲において、Vを0.1at%以上含む実施例1〜3の方が、Vを含まない比較例1と比べて、概ね保磁力が低いことが確認された。また、Vを含まない比較例1は、440℃を超えると保磁力が10A/mを超えて、急速に劣化するのに対し、Vを0.1at%以上含む実施例1〜3では、440℃でも保磁力は10A/m未満であることが確認された。高い磁束密度は高い到達温度域で得られるため、Vを添加することにより、軟磁気特性の劣化を防ぎつつ、高い到達温度で高い磁束密度を得ることができる。
昇温中、短冊形状の材料は均一に加熱されるが、巻磁心形状の材料は、材料表面では温度追従が容易であるが、材料内部では温度上昇が遅れてしまう。この傾向は、高速昇温で顕著になる。さらに、到達温度では、結晶化発熱が瞬時に起こり、巻磁心そのものの温度は急上昇する。その熱量は材料の重量に比例するため、温度上昇は磁心重量が大きいほど大きい。また、昇温速度が大きいほど結晶化発熱がより短時間に起こるため、温度上昇は大きくなる。
Claims (10)
- 組成式がFeaVαBbSicPxCyCuzであり、79≦a≦91at%、5≦b≦13at%、0≦c≦8at%、1≦x≦8at%、0≦y≦5at%、0.4≦z≦1.4at%、0.1≦α<5at%、および、0.08≦z/x≦0.55(ただし、z/x=0.25、および、z/x=0.50を除く)であることを特徴とする合金組成物。
- 0≦y≦3at%、および、0.4≦z≦1.1at%であることを特徴とする請求項1記載の合金組成物。
- Feの3at%以下を、Ti、Zr、Hf、Nb、Ta、Mo、W、Cr、Co、Ni、Al、Mn、Ag、Zn、Sn、As、Sb、Bi、Y、N、O、Ca、Mg、および、希土類元素のうち、1種類以上の元素で置換してなることを特徴とする請求項1または2記載の合金組成物。
- 連続薄帯形状を有することを特徴とする請求項1乃至3のいずれか1項に記載の合金組成物。
- 180度曲げ試験時において密着曲げ可能であることを特徴とする請求項4記載の合金組成物。
- 粉末形状を有することを特徴とする請求項1乃至3のいずれか1項に記載の合金組成物。
- 熱処理したとき、第1結晶化開始温度(Tx1)と第2結晶化開始温度(Tx2)とを有し、その温度差(ΔT=Tx2−Tx1)が100℃〜200℃であることを特徴とする請求項1乃至6のいずれか1項に記載の合金組成物。
- 非晶質と該非晶質中に存在する初期微結晶とからなるナノヘテロ構造を有し、前記初期微結晶の平均粒径が0.3〜10nmであることを特徴とする請求項1乃至7のいずれか1項に記載の合金組成物。
- 請求項1乃至8のいずれか1項に記載の合金組成物を用意するステップと、
前記合金組成物を、100℃〜300℃/minの昇温速度で加熱し、且つ、結晶化開始温度以上の温度で結晶化熱処理するステップとを
有することを特徴とするFe基ナノ結晶合金の製造方法。 - 前記合金組成物を用意するステップは、前記合金組成物を1g以上用意することを特徴とする請求項9記載のFe基ナノ結晶合金の製造方法。
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JP2018146884A JP6964837B2 (ja) | 2018-08-03 | 2018-08-03 | 合金組成物、および、Fe基ナノ結晶合金の製造方法 |
CN201910627912.4A CN110819914A (zh) | 2018-08-03 | 2019-07-12 | 合金组成物、Fe基纳米晶合金及其制造方法和磁性部件 |
KR1020217000965A KR102474993B1 (ko) | 2018-08-03 | 2019-07-25 | 합금 조성물, Fe계 나노 결정질 합금, 이의 제조 방법 및 자성 부재 |
PCT/CN2019/097735 WO2020024870A1 (zh) | 2018-08-03 | 2019-07-25 | 合金组成物、Fe基纳米晶合金及其制造方法和磁性部件 |
US17/165,380 US20210230723A1 (en) | 2018-08-03 | 2021-02-02 | Alloy composition, fe-based nano-crystalline alloy and manufacturing method thereof, and magnetic component |
JP2021152886A JP7034519B2 (ja) | 2018-08-03 | 2021-09-21 | 合金組成物、Fe基ナノ結晶合金及びその製造方法、並びに磁性部品 |
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US20210230723A1 (en) | 2021-07-29 |
KR102474993B1 (ko) | 2022-12-06 |
JP2020020023A (ja) | 2020-02-06 |
JP7034519B2 (ja) | 2022-03-14 |
KR20210096589A (ko) | 2021-08-05 |
CN110819914A (zh) | 2020-02-21 |
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