JP2019121738A - 軟磁性合金および磁性部品 - Google Patents
軟磁性合金および磁性部品 Download PDFInfo
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Abstract
Description
ナノ結晶部および非晶質部を含む軟磁性合金であって、
前記ナノ結晶部は主成分としてαFe(−Si)を含み、副成分としてB,P,C,Ti,Zr,Hf,Nb,Ta,Mo,V,W,Cr,Al,Mn,Zn,Cuから選択される1種以上の元素を含むことを特徴とする。
M1はTi,Zr,Hf,Nb,Ta,Mo,V,W,Cr,Al,Mn,Znから選択される1種以上であり、
M2はB,P,Cから選択される1種以上であり、
a+b+c+d+e=100
0.0≦b≦3.0
0.0≦c≦15.0
0.0≦d≦17.5
0.0≦e≦20.0
であってもよい。
a+b+c+d+e=100
0.0≦b≦3.0
0.0≦c≦15.0
0.0≦d≦17.5
0.0≦e≦20.0
である。
Fe:84原子%、B:9.0原子%、Nb:7.0原子%の組成の母合金が得られるように各種原料金属等をそれぞれ秤量した。そして、チャンバー内で真空引きした後、高周波加熱にて溶解し母合金を作製した。
Fe:73.5原子%、Cu:1.0原子%、Nb:3.0原子%、Si:13.5原子%、B:9.0原子%の組成の母合金が得られるように各種原料金属等をそれぞれ秤量した。そして、チャンバー内で真空引きした後、高周波加熱にて溶解し母合金を作製した。以下、実験1と同様にして試料No.40〜63の試料を作製した。結果を表3および表4に示す。
実験例3では、母合金の組成を表5〜表9に記載の組成に変化させた。そして、熱処理工程の前までは実験例1および実験例2と同条件で実施した。そして、熱処理を1段階で実施する場合と2段階で実施する場合とで保磁力および耐酸化性の違いを確認した。結果を表5〜表9に示す。1段階で熱処理を実施する場合には675℃で60分間とした。2段階で熱処理を実施する場合には、第1熱処理を450℃で60分間、第2熱処理を650℃で60分間とした。熱処理はセッターの材質を実験例1と同様のカーボンとして行った。なお、熱処理前の薄帯に結晶が存在していた場合については、1段階熱処理での保磁力が著しく大きくなったため、2段階熱処理を行わなかった。また、2段階熱処理後の試料については、3DAPを用いてナノ結晶部におけるM1+M2+Cuの含有量(α)、非晶質部におけるM1+M2+Cuの含有量(β)を測定した。さらに、ナノ結晶の平均粒径およびナノ結晶部の結晶化度についても測定した。また耐酸化性については温度80度、湿度85%中で、高温耐湿試験をおこない、30分後ごとに表面を観察し点錆ができたかどうかを判断した。2段階熱処理における点錆発生までの時間が1段階熱処理における点錆発生までの時間よりも2.0倍以上であった場合を◎、1.2倍以上2.0倍未満の場合を○、1.0倍超1.2倍未満の場合を△とし、1.0倍以下の場合を×とした。なお、◎、○、△、×の順番に優れており、本実験例では△以上の評価である場合を良好とした。
実験例4では、母合金の組成を表10に記載の組成に変化させた。そして、熱処理工程の前までは実験例1および実験例2と同条件で実施した。そして、熱処理を1段階で実施する場合と2段階で実施する場合とで保磁力および耐酸化性の違いを確認した。結果を表10に示す。1段階で熱処理を実施する場合には450℃で60分間とした。2段階で熱処理を実施する場合には、第1熱処理を350℃で60分間、第2熱処理を425℃で60分間とした。熱処理はセッターの材質を実験例1と同様のカーボンとして行った。なお、熱処理前の薄帯に結晶が存在していた場合については、1段階熱処理での保磁力が著しく大きくなったため、2段階熱処理を行わなかった。また、2段階熱処理後の試料については、3DAPを用いてナノ結晶部におけるM1+M2+Cuの含有量(α)、非晶質部におけるM1+M2+Cuの含有量(β)を測定した。さらに、ナノ結晶の平均粒径およびナノ結晶部の結晶化度についても測定した。また耐酸化性については温度80度、湿度85%中で、高温耐湿試験をおこない、30分後ごとに表面を観察し点錆ができたかどうかを判断した。2段階熱処理における点錆発生までの時間が1段階熱処理における点錆発生までの時間よりも2.0倍以上であった場合を◎、1.2倍以上2.0倍未満の場合を○、1.0倍超1.2倍未満の場合を△とし、1.0倍以下の場合を×とした。なお、◎、○、△、×の順番に優れており、本実験例では△以上の評価である場合を良好とした。
実験例5では、母合金の組成を表11に記載の組成に変化させた。そして、熱処理工程の前までは実験例1および実験例2と同条件で実施した。そして、熱処理を1段階で実施する場合と2段階で実施する場合とで保磁力および耐酸化性の違いを確認した。結果を表11に示す。1段階で熱処理を実施する場合には550℃で60分間とした。2段階で熱処理を実施する場合には、第1熱処理を425℃で60分間、第2熱処理を525℃で60分間とした。熱処理はセッターの材質を実験例1と同様のカーボンとして行った。なお、熱処理前の薄帯に結晶が存在していた場合については、1段階熱処理での保磁力が著しく大きくなったため、2段階熱処理を行わなかった。また、2段階熱処理後の試料については、3DAPを用いてナノ結晶部におけるM1+M2+Cuの含有量(α)、非晶質部におけるM1+M2+Cuの含有量(β)を測定した。さらに、ナノ結晶の平均粒径およびナノ結晶部の結晶化度についても測定した。また耐酸化性については温度80度、湿度85%中で、高温耐湿試験をおこない、30分後ごとに表面を観察し点錆ができたかどうかを判断した。2段階熱処理における点錆発生までの時間が1段階熱処理における点錆発生までの時間よりも2.0倍以上であった場合を◎、1.2倍以上2.0倍未満の場合を○、1.0倍超1.2倍未満の場合を△とし、1.0倍以下の場合を×とした。なお、◎、○、△、×の順番に優れており、本実験例では△以上の評価である場合を良好とした。
実験例6では、母合金の組成を表12に記載の組成に変化させた点以外は実験例3と同条件で実施し、評価した。結果を表12に示す。
実験例7では、表13に示す組成の母合金が得られるように各種原料をそれぞれ秤量した。そして、チャンバー内で真空引きした後、高周波加熱にて溶解し母合金を作製した。
13… 非晶質部
31… ノズル
32… 溶融金属
33… ロール
34… 薄帯
35… チャンバー
Claims (9)
- ナノ結晶部および非晶質部を含む軟磁性合金であって、
前記ナノ結晶部は主成分としてαFe(−Si)を含み、副成分としてB,P,C,Ti,Zr,Hf,Nb,Ta,Mo,V,W,Cr,Al,Mn,Zn,Cuから選択される1種以上の元素を含むことを特徴とする軟磁性合金。 - 結晶化度が15%以上70%以下である請求項1に記載の軟磁性合金。
- 前記ナノ結晶部における副成分の合計含有割合をα(at%)として、0.5≦α≦20である請求項1または2に記載の軟磁性合金。
- 前記非晶質部に含まれる前記ナノ結晶部の副成分の合計含有割合をβ(at%)として、10≦β≦60である請求項1〜3のいずれかに記載の軟磁性合金。
- 前記ナノ結晶部における副成分の合計含有割合をα(at%)、前記非晶質部に含まれる前記ナノ結晶部の副成分の合計含有割合をβ(at%)として、0.05<(α/β)<0.20である請求項1〜4のいずれかに記載の軟磁性合金。
- 組成式FeaCubM1cSidM2eで表される軟磁性合金であって、
M1はTi,Zr,Hf,Nb,Ta,Mo,V,W,Cr,Al,Mn,Znから選択される1種以上であり、
M2はB,P,Cから選択される1種以上であり、
a+b+c+d+e=100
0.0≦b≦3.0
0.0≦c≦15.0
0.0≦d≦17.5
0.0≦e≦20.0
である請求項1〜5のいずれかに記載の軟磁性合金。 - 薄帯形状である請求項1〜6のいずれかに記載の軟磁性合金。
- 粉末形状である請求項1〜6のいずれかに記載の軟磁性合金。
- 請求項1〜8のいずれかに記載の軟磁性合金からなる磁性部品。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018002049A JP6439884B6 (ja) | 2018-01-10 | 2018-01-10 | 軟磁性合金および磁性部品 |
TW107145174A TWI707957B (zh) | 2018-01-10 | 2018-12-14 | 軟磁性合金及磁性部件 |
US16/221,977 US10991495B2 (en) | 2018-01-10 | 2018-12-17 | Soft magnetic alloy and magnetic component |
KR1020180164178A KR102195302B1 (ko) | 2018-01-10 | 2018-12-18 | 연자성 합금 및 자성 부품 |
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US11615902B2 (en) | 2019-02-28 | 2023-03-28 | Taiyo Yuden Co., Ltd. | Soft magnetic alloy powder and method for manufacturing same, as well as coil component made from soft magnetic alloy powder and circuit board carrying same |
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US20220235446A1 (en) * | 2019-05-31 | 2022-07-28 | Tdk Corporation | Soft magnetic alloy and magnetic component |
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