On Magnetic Shielding Effectiveness of Porous, Corrosion-Resistant PM Magnetic Alloys.

DOI Web Site 1 Citations 18 References

Bibliographic Information

Other Title
  • 磁石・磁性材料の化学　ＩＩ　　多孔質，耐食性ＰＭ磁性材料の磁気シールド効果について
  • タコウシツ タイショクセイ PM ジセイ ザイリョウ ノ ジキ シールド コウカ ニ ツイテ

Search this article

Abstract

The objective of this study is mainly to evaluate PM ferritic stainless steel as magnetic shielding plate, comparing with PM PB-permalloy. In this case, PM plate thickness and sintering temperature (1173-1623K) were employed as parameters to optimize DC/AC (≤10kHz) magnetic shielding effect of materials, including magnetic measuring apparatus arrangement.<BR>The results obtained in these conditions were summarized as follows:<BR>(1) DC magnetic field is allowed to attenuate to a saturate level by using PM plate with 4mm thick which is sintered at 1273K at the lowest, while the saturate value decreases with the distance (r) from a magnetic source.<BR>(2) AC magnetic field also is allowed to attenuate to a saturate level by using PM plate with 4mm thick which is sintered at 1373K at the lowest, although the saturate value differentiates between the frequencies of 1 and 10 kHz.<BR>(3) Magnetic attenuation (dB) is fairly enhanced when a covering of the high-μ permalloy sheet is put on the periphery of PM plate in DC and 1 kHz range, although it is not effective in higher frequency range.<BR>(4) Bend strength of PM plate shows a higher value by being sintered at higher temperature (ex.-200MPa at 1373K), untouched by the direct influence of material itself.<BR>(5) PM ferritic stainless steel proved to have almost the same magnetic shielding effect as PM PB-permalloy, when sintered at 1373K or higher, and consequently, to be used as porous, corrosion-resistant magnetic shielding alloy.

Journal

Citations (1)*help

See more

References(18)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top