Effects of Nd and B contents on the thermal stability of nanocomposite (Nd,Zr)2Fe14B/α-Fe magnets

Wang, C.; Yan, Mi; Li, Q.

doi:10.1016/j.mseb.2008.02.007

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…Thereby, notable differences in the microstructure for processing with low and high energy input were observed [22]. Melt spinning of Nd2Fe14B/-Fe nanocomposites with comparable rare earth content results typically in coercivities below 700 kA/m [12,25]. This value is largely exceeded by the LPBF-technique, which emphasizes that there may exist some similarities between melt spinning and LPBF but further factors LPBF-specific factors, e.g.…”

Section: Table 1 Herementioning

confidence: 99%

Unexpected Coercivity Enhancement >1T for Nd-Fe-B Permanent Magnets With 20 wt% Nd Produced by Laser Powder Bed Fusion

2022

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The impact of laser powder bed fusion (LPBF) on coercivity of Nd-lean commercial MQP TM -S powder is investigated. It is found that different processing parameters, such as laser power, scan velocity and hatch spacing, have a remarkable impact on the magnetic performance of LPBF-processed Nd-Fe-B permanent magnets. The increase of energy input during manufacturing will also increase coercivity and a maximum value of 920 kA/m (µ0Hc = 1.15 T) was achieved without any further post-processing. Among other parameters, hatch spacing was identified as the major contribution to coercivity and its role is discussed on basis of the several re-melting events, if hatch spacing becomes increasingly smaller than the laser focus diameter. The maximum coercivity is obtained, for hatch spacing of 35 µm and laser focus diameter of 110 µm, which led to a threefold re-melting if the sample.

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Section: Table 1 Herementioning

confidence: 99%

Unexpected Coercivity Enhancement >1T for Nd-Fe-B Permanent Magnets With 20 wt% Nd Produced by Laser Powder Bed Fusion

2022

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“…The temperature coefficient of remanence (α) and temperature coefficient of coercivity (β) in the temperature range T o À T are defined as T T ( )) 100% o − × [15]. Fig.…”

Section: Effects Of Re and B Concentrations On The Thermal Stabilitymentioning

confidence: 99%

“…As for Nd 2 Fe 14 B/Fe 3 B type nanocomposite alloys, a good balance between the J r and j H C can be obtained in the composition range of Nd Fe bal. B [10][11][12][13][14][15] [2][3][4]. Betancourt et al [5] obtained high magnetic properties in melt spun (Nd 0.75 Pr 0.25 ) 10 (Fe 0.9 Co 0.1 ) 78 Nb 2 B 10 alloy with j H C ¼ 1042 kA/m, J r ¼0.88 T, and (BH) max ¼123 kJ/m 3 .…”

Section: Introductionmentioning

confidence: 99%

Compositional optimization for nanocrystalline hard magnetic MRE–Fe–B–Zr alloys via modifying RE and B contents

Qian

Hussain

Zheng

et al. 2015

Journal of Magnetism and Magnetic Materials

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“…In recent years, many scientific and industrial units have been carrying out research on methods for curing their magnetic properties. [1][2][3][4][5] The studies were mainly focused on slight modifications to the chemical composition and modifications to the production process parameters.…”

Section: Introductionmentioning

confidence: 99%

Influence of solidification speed on the structure and magnetic properties of Nd10Fe81Zr1B6 in the as-cast state

Dośpiał¹,

Nabiałek²

2016

Mater. Tehnol.

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The paper presents results of the structure and magnetic properties of the Nd10-xTbxFe81Zr1B6 (x = 0, 2) alloy in the as-cast state. The samples were produced using the melt-spinning method. The solidification speed was controlled indirectly by changing the linear velocity of a copper drum. Based on magnetic and structural studies, it was found that samples obtained while the linear velocity of the copper drum was equal to 20 m/s had good hard-magnetic properties. The substitution of 2 % of Nd by Tb led to grain growth of both the a-Fe (9 nm and 24 nm for x = 0 and x = 2) and Nd2Fe14B phases (41 nm and 70 nm for x = 0 and x = 2, respectively). The grain growth to sizes higher than the exchange interaction distance in the sample with Tb resulted in a bimodal shape of the demagnetization curve. The samples obtained at higher linear speeds of the copper drum were composed of amorphous matrices with small amounts of crystalline phases and had weak, soft-magnetic properties. Keywords: permanent magnets, nanocomposities, X-ray diffraction, exchange interactionŝ lanek predstavlja rezultate {tudije strukturnih in magnetnih lastnosti zlitine Nd10-xTbxFe81Zr1B6 (x = 0, 2) v litem stanju. Vzorci so bili pripravljeni z ulivanjem na hitro vrte~em se valju. Hitrost strjevanja je bila posredno kontrolirana s spreminjanjem linearne hitrosti bakrenega valja. Magnetne in strukturne {tudije so pokazale, da imajo vzorci, dobljeni pri linearni hitrosti bakrenega valja 20 m/s, dobre trdomagnetne lastnosti. Nadomestilo z 2 % atomskega dele`a Nd s Tb, je povzro~ilo rast zrn obeh faz a-Fe (9 nm in 24 nm pri x = 0 in x = 2) in Nd2Fe14B (41 nm in 70 nm pri x = 0 in x = 2). Rast zrn, do velikosti, ve~je od izmenjalne interakcijske razdalje v vzorcu s Tb, se je pokazala v bimodalni obliki demagnetizacijske krivulje. Vzorci, dobljeni pri ve~jih linearnih hitrostih bakrenega valja, so bili sestavljeni iz amorfne osnove z majhnim dele`em kristalnih faz in so imeli slabe mehko magnetne lastnosti. Klju~ne besede: permanentni magneti, nanokompoziti, rentgenska difrakcija, izmenjalne interakcije

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Effects of Nd and B contents on the thermal stability of nanocomposite (Nd,Zr)2Fe14B/α-Fe magnets

Cited by 9 publications

References 21 publications

Unexpected Coercivity Enhancement >1T for Nd-Fe-B Permanent Magnets With 20 wt% Nd Produced by Laser Powder Bed Fusion

Unexpected Coercivity Enhancement >1T for Nd-Fe-B Permanent Magnets With 20 wt% Nd Produced by Laser Powder Bed Fusion

Compositional optimization for nanocrystalline hard magnetic MRE–Fe–B–Zr alloys via modifying RE and B contents

Influence of solidification speed on the structure and magnetic properties of Nd10Fe81Zr1B6 in the as-cast state

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