TY - JOUR
T1 - Spark plasma sintering of soft magnetic Fe-Si-B-P-Cu nanocrystalline alloy in the form of magnetic cores
AU - Zhang, Yan
AU - Sharma, Parmanand
AU - Makino, Akihiro
PY - 2011
Y1 - 2011
N2 - Flakes of Fe 84.3Si 4B 8P 3Cu 0.7 amorphous alloy ribbons with low glass forming ability were consolidated into bulk nanocrystalline specimens (magnetic core shape) with 12mm in diameter and 2-5mm in height by the spark plasma sintering (SPS) technique. The SPS technique, capable of rapid heating and cooling, enabled us to obtain a densely compacted bulk nanocrystalline material by maintaining the status of amorphous structure or nanocrystalline structure. As a result, high relative density ̃91.8-96.1% and nanocrystalline structure with average grain size below 41 nm were obtained. The Vickers hardness of the bulk nanocrystalline samples approaches to 1513, which is 2.0 and 3.2 times of the as-quenched amorphous ribbon and the fully annealed ingot, respectively. These sintered nanocrystalline materials exhibit good soft magnetic properties (saturation magnetic flux density ̃1.5-1.68 T, coercivity ̃41-120Am -1), and can be useful for high magnetic flux density and high frequency applications.
AB - Flakes of Fe 84.3Si 4B 8P 3Cu 0.7 amorphous alloy ribbons with low glass forming ability were consolidated into bulk nanocrystalline specimens (magnetic core shape) with 12mm in diameter and 2-5mm in height by the spark plasma sintering (SPS) technique. The SPS technique, capable of rapid heating and cooling, enabled us to obtain a densely compacted bulk nanocrystalline material by maintaining the status of amorphous structure or nanocrystalline structure. As a result, high relative density ̃91.8-96.1% and nanocrystalline structure with average grain size below 41 nm were obtained. The Vickers hardness of the bulk nanocrystalline samples approaches to 1513, which is 2.0 and 3.2 times of the as-quenched amorphous ribbon and the fully annealed ingot, respectively. These sintered nanocrystalline materials exhibit good soft magnetic properties (saturation magnetic flux density ̃1.5-1.68 T, coercivity ̃41-120Am -1), and can be useful for high magnetic flux density and high frequency applications.
KW - Amorphous alloy
KW - Bulk nanocrystalline material
KW - Compact
KW - Soft magnetic property
KW - Spark plasma sintering
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U2 - 10.2320/matertrans.M2011233
DO - 10.2320/matertrans.M2011233
M3 - Article
AN - SCOPUS:84863339274
VL - 52
SP - 2254
EP - 2257
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 12
ER -