Wear-Resistant Audio Head Using Amorphous Alloy Material

Osamu KOHMOTO; Kazuo OHYA; Teruhiko OJIMA

Wear-Resistant Audio Head Using Amorphous Alloy Material

Osamu KOHMOTO, Kazuo OHYA, Teruhiko OJIMA

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Magnetic, mechanical, and chemical properties of amorphous Co-based alloys (Fe-Co)₇₅(Si_zB_1z)₂₅ and (Fe-Co-Ru)₇₅(Si_0.2B_0.8)₂₅ having zero magnetostriction were studied for use as recording/playback head cores. Preferable Si/(SiB) ratio (z) for high saturation induction and high permeability is between 0.15 and 0.2. Small addition of Ru is found to improve wear resistance. A suitable alloy (Fe-Co-Ru-Cr)₇₅(Si_0.2B_0.8)₂₅ for audio heads has been developed with values of B₁₀8.2 kG, H_c20 mOe, and µ₁(1 kHz)8,000. Comparing with a commercial sendust head, three features of the amorphous-alloy head were observed: high wear resistance, low bias current, and high output level at high frequencies.

Publication: IEICE TRANSACTIONS on transactions Vol.E72-E No.9 pp.993-997

Publication Date: 1989/09/25

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Type of Manuscript: PAPER

Category: Materials

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Osamu KOHMOTO
Kazuo OHYA
Teruhiko OJIMA

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Osamu KOHMOTO, Kazuo OHYA, Teruhiko OJIMA, "Wear-Resistant Audio Head Using Amorphous Alloy Material" in IEICE TRANSACTIONS on transactions, vol. E72-E, no. 9, pp. 993-997, September 1989, doi: .
Abstract: Magnetic, mechanical, and chemical properties of amorphous Co-based alloys (Fe-Co)₇₅(Si_zB_1z)₂₅ and (Fe-Co-Ru)₇₅(Si_0.2B_0.8)₂₅ having zero magnetostriction were studied for use as recording/playback head cores. Preferable Si/(SiB) ratio (z) for high saturation induction and high permeability is between 0.15 and 0.2. Small addition of Ru is found to improve wear resistance. A suitable alloy (Fe-Co-Ru-Cr)₇₅(Si_0.2B_0.8)₂₅ for audio heads has been developed with values of B₁₀8.2 kG, H_c20 mOe, and µ₁(1 kHz)8,000. Comparing with a commercial sendust head, three features of the amorphous-alloy head were observed: high wear resistance, low bias current, and high output level at high frequencies.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e72-e_9_993/_p

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@ARTICLE{e72-e_9_993,
author={Osamu KOHMOTO, Kazuo OHYA, Teruhiko OJIMA, },
journal={IEICE TRANSACTIONS on transactions},
title={Wear-Resistant Audio Head Using Amorphous Alloy Material},
year={1989},
volume={E72-E},
number={9},
pages={993-997},
abstract={Magnetic, mechanical, and chemical properties of amorphous Co-based alloys (Fe-Co)₇₅(Si_zB_1z)₂₅ and (Fe-Co-Ru)₇₅(Si_0.2B_0.8)₂₅ having zero magnetostriction were studied for use as recording/playback head cores. Preferable Si/(SiB) ratio (z) for high saturation induction and high permeability is between 0.15 and 0.2. Small addition of Ru is found to improve wear resistance. A suitable alloy (Fe-Co-Ru-Cr)₇₅(Si_0.2B_0.8)₂₅ for audio heads has been developed with values of B₁₀8.2 kG, H_c20 mOe, and µ₁(1 kHz)8,000. Comparing with a commercial sendust head, three features of the amorphous-alloy head were observed: high wear resistance, low bias current, and high output level at high frequencies.},
keywords={},
doi={},
ISSN={},
month={September},}

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TY - JOUR
TI - Wear-Resistant Audio Head Using Amorphous Alloy Material
T2 - IEICE TRANSACTIONS on transactions
SP - 993
EP - 997
AU - Osamu KOHMOTO
AU - Kazuo OHYA
AU - Teruhiko OJIMA
PY - 1989
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E72-E
IS - 9
JA - IEICE TRANSACTIONS on transactions
Y1 - September 1989
AB - Magnetic, mechanical, and chemical properties of amorphous Co-based alloys (Fe-Co)₇₅(Si_zB_1z)₂₅ and (Fe-Co-Ru)₇₅(Si_0.2B_0.8)₂₅ having zero magnetostriction were studied for use as recording/playback head cores. Preferable Si/(SiB) ratio (z) for high saturation induction and high permeability is between 0.15 and 0.2. Small addition of Ru is found to improve wear resistance. A suitable alloy (Fe-Co-Ru-Cr)₇₅(Si_0.2B_0.8)₂₅ for audio heads has been developed with values of B₁₀8.2 kG, H_c20 mOe, and µ₁(1 kHz)8,000. Comparing with a commercial sendust head, three features of the amorphous-alloy head were observed: high wear resistance, low bias current, and high output level at high frequencies.
ER -