KR102573802B1 - R-Fe-B계 소결 자성체 및 그 입계 확산 처리방법 - Google Patents
R-Fe-B계 소결 자성체 및 그 입계 확산 처리방법 Download PDFInfo
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- KR102573802B1 KR102573802B1 KR1020227001371A KR20227001371A KR102573802B1 KR 102573802 B1 KR102573802 B1 KR 102573802B1 KR 1020227001371 A KR1020227001371 A KR 1020227001371A KR 20227001371 A KR20227001371 A KR 20227001371A KR 102573802 B1 KR102573802 B1 KR 102573802B1
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- diffusion
- grain boundary
- sintered
- based sintered
- magnetic body
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- 229910052751 metal Inorganic materials 0.000 claims description 4
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- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
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- PCBOWMZAEDDKNH-HOTGVXAUSA-N [4-(trifluoromethoxy)phenyl]methyl (3as,6as)-2-(3-fluoro-4-sulfamoylbenzoyl)-1,3,3a,4,6,6a-hexahydropyrrolo[3,4-c]pyrrole-5-carboxylate Chemical compound C1=C(F)C(S(=O)(=O)N)=CC=C1C(=O)N1C[C@H]2CN(C(=O)OCC=3C=CC(OC(F)(F)F)=CC=3)C[C@@H]2C1 PCBOWMZAEDDKNH-HOTGVXAUSA-N 0.000 description 2
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- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
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- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0293—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
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- C21D6/001—Heat treatment of ferrous alloys containing Ni
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Abstract
Description
도 1은 사각형 배체 중 자화 방향과 수직되는 표면의 평면 예시도로서, 화살표는 확산 방향을 의미한다.
도 2는 R-Fe-B계 소결 자성체의 평면 예시도이다.
도 3은 R-Fe-B계 소결 자성체의 다른 평면 예시도이다.
도 4는 확산면의 평면 예시도이다.
도 5는 자화 방향과 수직되게 확산되는 소결 자성체 표면 부근의 HR(Tb) 원소 분포의 대조도이다.
도 5a는 통상적인 소결 자성체이고, 도 5b는 본 발명의 실시예 1의 소결 자성체이다.
도 6은 본 발명의 실시예 1.1의 소결 자성체 HR 분포 EPMA 표징 결과이다.
순번 | Nd | B | Al | Ga | Cu | Ti | Co | Zr | O | Fe |
비교예 1.1 | 30.5 | 1.00 | 0.08 | 0.3 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.1 | 30.5 | 0.96 | 0.08 | 0.3 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.2 | 30.5 | 0.92 | 0.08 | 0.3 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.3 | 30.5 | 0.88 | 0.08 | 0.3 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.4 | 30.5 | 0.83 | 0.08 | 0.3 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
비교예 1.2 | 30.5 | 0.8 | 0.08 | 0.3 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
비교예 1.3 | 30.5 | 0.92 | 0.08 | 0.08 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.5 | 30.5 | 0.92 | 0.08 | 0.1 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.6 | 30.5 | 0.92 | 0.08 | 0.35 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.7 | 30.5 | 0.92 | 0.08 | 0.4 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.8 | 30.5 | 0.92 | 0.08 | 0.45 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.9 | 30.5 | 0.92 | 0.08 | 1.0 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
비교예 1.4 | 30.5 | 0.92 | 0.08 | 1.3 | 0.12 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
비교예 1.5 | 30.5 | 0.92 | 0.08 | 0.1 | 0.1 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
비교예 1.6 | 30.5 | 0.92 | 0.1 | 0.08 | 0.1 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.9 | 30.5 | 0.92 | 0.08 | 0.1 | 0.2 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.10 | 30.5 | 0.92 | 0.08 | 0.2 | 0.1 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.11 | 30.5 | 0.92 | 0.2 | 0.1 | 0.08 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.12 | 30.5 | 0.92 | 0.08 | 0.2 | 0.2 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.13 | 30.5 | 0.92 | 0.08 | 0.3 | 0.3 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.14 | 30.5 | 0.92 | 0.3 | 0 | 0 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.15 | 30.5 | 0.92 | 0 | 0.3 | 0 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
실시예 1.16 | 30.5 | 0.92 | 0.3 | 0.3 | 0.2 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
비교예 1.7 | 30.5 | 0.92 | 0.1 | 0.1 | 0.08 | 0.1 | 0.8 | 0.1 | 0.1 | 잔량 |
순번 | HRa (wt%) |
HRb wt%) |
HRc (wt%) |
HRd (wt%) | HRd/ HRa |
HRe (wt%) |
HRf (wt%) |
HRg (wt%) |
120℃ 개회로 열 자기 소거율(%) |
비교예 1.1 | 12.5 | 0.43 | 0.31 | 0.26 | 0.021 | 0.47 | 0.59 | 0.31 | 15 |
실시예 1.1 | 8.58 | 4.97 | 2.25 | 0.86 | 0.100 | 4.65 | 4.73 | 5.01 | 2.7 |
실시예 1.2 | 8.24 | 6.89 | 3.79 | 1.05 | 0.127 | 5.87 | 5.92 | 5.49 | 1.1 |
실시예 1.3 | 8.45 | 6.91 | 4.05 | 1.23 | 0.145 | 6.33 | 5.97 | 6.09 | 1.5 |
실시예 1.4 | 8.33 | 5.93 | 3.95 | 1.17 | 0.140 | 5.65 | 5.37 | 5.89 | 1.7 |
비교예 1.2 | 9.33 | 5.95 | 2.09 | 1.12 | 0.120 | 5.77 | 5.69 | 5.95 | 12.9 |
비교예 1.3 | 17.5 | 0.47 | 0.33 | 0.27 | 0.015 | 0.35 | 0.69 | 0.73 | 23 |
실시예 1.4 | 8.33 | 5.93 | 3.95 | 1.17 | 0.140 | 5.88 | 5.67 | 5.97 | 1.7 |
실시예 1.5 | 8.36 | 4.87 | 2.34 | 0.97 | 0.116 | 5.38 | 5.49 | 5.54 | 1.3 |
실시예 1.6 | 8.22 | 6.01 | 4.33 | 1.56 | 0.189 | 5.96 | 6.03 | 6.14 | 2.1 |
실시예 1.7 | 8.29 | 5.97 | 4.59 | 2.01 | 0.242 | 5.39 | 5.63 | 5.78 | 1.9 |
실시예 1.8 | 8.33 | 6.05 | 4.77 | 2.31 | 0.277 | 4.97 | 5.09 | 5.13 | 2.3 |
실시예 1.9 | 8.45 | 5.33 | 3.65 | 1.48 | 0.175 | 5.45 | 5.67 | 5.39 | 3.1 |
비교예 1.4 | 8.54 | 5.99 | 4.29 | 1.38 | 0.162 | 5.87 | 5.79 | 5.65 | 11 |
비교예 1.5 | 16.2 | 0.85 | 0.37 | 0.22 | 0.014 | 0.97 | 0.33 | 0.85 | 13 |
비교예 1.6 | 19.1 | 0.79 | 0.42 | 0.37 | 0.019 | 0.69 | 0.57 | 0.31 | 17 |
실시예 1.10 | 8.98 | 5.99 | 3.49 | 1.57 | 0.175 | 5.46 | 5.31 | 5.72 | 2.4 |
실시예 1.11 | 8.93 | 5.94 | 3.77 | 1.65 | 0.185 | 5.83 | 5.61 | 5.79 | 2.1 |
실시예 1.12 | 9.44 | 6.98 | 4.79 | 2.39 | 0.253 | 6.43 | 6.29 | 6.15 | 1.6 |
실시예 1.13 | 8.38 | 6.95 | 4.67 | 2.45 | 0.292 | 4.19 | 4.27 | 4.23 | 1.9 |
실시예 1.14 | 8.89 | 5.25 | 3.17 | 1.32 | 0.148 | 5.12 | 4.98 | 5.37 | 2.6 |
실시예 1.15 | 9.32 | 5.33 | 3.48 | 1.42 | 0.152 | 5.29 | 5.35 | 5.61 | 2.9 |
실시예 1.16 | 8.63 | 6.79 | 5.05 | 2.79 | 0.323 | 6.22 | 5.98 | 6.31 | 1.7 |
비교예 1.7 | 15.3 | 1.44 | 0.78 | 0.33 | 0.022 | 1.13 | 0.71 | 1.58 | 17 |
원소 | Nd | B | Al | Ga | Cu | Ti | Co | Zr | Fe |
소결 자성체 | 30.5 | 0.92 | 0.08 | 0.2 | 0.12 | 0.1 | 0.8 | 0.1 | 잔량 |
순번 | 확산원 | HRa(wt%) | HRb(wt%) | HRc(wt%) | Hrd (wt%) | HRd/HRa | 120℃ 개회로 열 자기 소거율(%) |
실시예 2.1 | Tb 금속 | 18.5 | 10.61 | 6.53 | 4.37 | 0.236 | 3.9 |
실시예 2.2 | Tb 산화물 | 23.7 | 15.87 | 10.57 | 6.41 | 0.270 | 3.6 |
실시예 2.3 | Tb 불화물 | 14.2 | 9.71 | 7.49 | 3.33 | 0.235 | 3.9 |
실시예 2.4 | Tb-Al 합금 | 9.33 | 7.05 | 5.79 | 3.29 | 0.353 | 2.2 |
순번 | Tb | Al | Cu | Ga |
실시예 3.1 | 98.5 | 0.5 | 0.5 | 0.5 |
실시예 3.2 | 95 | 5 | 0 | 0 |
실시예 3.3 | 95 | 0 | 5 | 0 |
실시예 3.4 | 95 | 0 | 0 | 5 |
실시예 3.5 | 70 | 10 | 10 | 10 |
실시예 3.6 | 50 | 20 | 15 | 15 |
순번 | HRa(wt%) | HRb(wt%) | HRc(wt%) | Hrd(wt%) | HRd/HRa | 120℃ 개회로 열 자기 소거율(%) |
실시예 3.1 | 19.6 | 12.31 | 8.98 | 4.57 | 0.233 | 3.5 |
실시예 3.2 | 9.37 | 6.35 | 4.79 | 2.97 | 0.317 | 2.8 |
실시예 3.3 | 8.97 | 5.87 | 4.33 | 2.83 | 0.315 | 2.3 |
실시예 3.4 | 8.33 | 5.12 | 3.77 | 2.56 | 0.307 | 1.9 |
실시예 3.5 | 9.12 | 6.55 | 4.87 | 3.32 | 0.364 | 1.7 |
실시예 3.6 | 6.33 | 3.76 | 1.55 | 1.33 | 0.210 | 9.7 |
Claims (10)
- R-Fe-B계 소결 자상체에 있어서, 상기 R-Fe-B계 소결 자성체는 R-Fe-B계 소결 배체에 대한 HR 입계 확산 처리를 거쳐 취득하고, 상기 R-Fe-B계 소결 배체는 R2Fe14B형 주상을 함유하며, 적어도,
28wt%~33wt%의 R(상기 R는 Nd를 포함하는 적어도 한가지 희토류 원소임);
0.83wt%~0.96wt%의 B;
0.3wt%~1.2wt%의 M(상기 M은 Al, Cu, Ga를 포함함); 및,
65.2Wt%~70.5wt%의 Fe, 또는 Fe와 Co; 를 포함하여 구성되되,
상기 HR는 Dy, Tb, Ho, Er, Tm, Y, Yb, Lu, Gd 중에서 선택된 적어도 한가지이고;
상기 R-Fe-B계 소결 배체는 자화 방향 및 복수의 표면을 가지되, 자화 방향과 수직인 표면이 배향면이고, 배향면 이외의 표면이 비배향면이며; 상기 R-Fe-B계 소결 배체의 적어도 하나의 비배향면에 HR 함유 확산원을 적용함으로써 HR가 상기 R-Fe-B계 소결 배체를 따라 자화 방향과 수직되게 입계 확산되도록 하고, 상기 확산원이 적용된 비배향면은 확산면이며;
확산 방향을 따라, 확산면과의 거리가 가까운 점일수록 HR 함량이 더욱 높고, 확산면과의 거리가 500μm를 초과하지 않은 임의 두 점의 HR 함량의 비율이 0.1~1.0인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 제1항에 있어서,
상기 확산 방향을 따라, 확산면과의 거리가 500um를 초과하지 않은 임의 두 점의 HR 함량의 비율이 0.2~1.0인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 제1항에 있어서,
자화 방향을 따라, 임의 두 점의 HR 함량의 비율이 0.7~1.0인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 제1항에 있어서,
상기 소결 배체는 0.05wt%~2.5wt%의 T를 더 포함하고, 상기 T는 Zn, Si, Ti, V, Cr, Mn, Ni, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sb, Hf, Ta, W, O, C, N, S, F, P 중에서 선택된 적어도 한가지 원소인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 제1항에 있어서,
상기 M은 Ga, Al, Cu 로 구성되며, 상기 Ga, Al, Cu의 함량의 합은 0.3wt%~0.8wt%인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 제1항에 있어서,
상기 HR 입계 확산의 확산원은 HR 금속, 산화 HR, 불화수소화 HR, 불화 HR, 수소화 HR, 불산화 HR, HR-M 합금 중의 적어도 한가지인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 제6항에 있어서,
상기 확산원인 HR-M 합금에 있어서, 상기 M의 함량은 2wt% 이상 30wt% 이하이며, 상기 HR의 함량은 70wt% 이상 98wt% 이하인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 제1항 내지 제7항 중 어느 한 항에 있어서,
상기 R-Fe-B계 소결 배체는 사각형 배체인 것을 특징으로 하는 R-Fe-B계 소결 자성체. - 상기 R-Fe-B계 소결 배체는 자화 방향 및 복수의 표면을 포함하되, 자화 방향과 수직인 표면이 배향면이고, 배향면 이외의 표면이 비배향면이며; 상기 R-Fe-B계 소결 배체의 적어도 하나의 비배향면에 HR 함유 확산원을 적용함으로써 HR가 상기 R-Fe-B계 소결 배체를 따라 자화 방향과 수직되게 입계 확산되도록 한 다음, 열처리를 수행하는 것을 특징으로 하는 제1항 내지 제7항 중 어느 한 항에 따른 R-Fe-B계 소결 자성체의 HR 입계 확산 처리 방법.
- 제9항에 있어서,
상기 R-Fe-B계 소결 배체는 사각형 배체이고, 상기 R-Fe-B계 소결 배체의 네개의 비배향면에 HR 함유 확산원을 적용하는 것을 특징으로 하는 R-Fe-B계 소결 자성체의 HR 입계 확산 처리 방법.
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