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Browsing by Author "Chang, Hsuan Yao"

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    Enhanced electromagnetic properties of Fe-Cr-Si alloy powders by sodium silicate treatment
    (2015-07-15)
    Chen, Shih Fan
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    Chang, Hsuan Yao
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    Wang, Shea Jue
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    Chen, Shih Hsun
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    Chen, Chien Chon
    The Fe-Si-Cr alloy powders were successfully modified by using the phosphatizing and sodium silicate coating processes. The optimized surface pre-treatment for Fe-Si-Cr powder was phosphatized in 2 wt.% phosphoric solution and further treated with 4 wt.% sodium silicate solution at 75 degrees C for 30 min. These treatments increased the high-frequency stability for Fe-Si-Cr alloy powders, and the annealed cores further showed the enhanced performance of permeability, impedance, quality factor and anti-corrosion ability. Comparing with the Fe-Si-Al alloy, the Fe-Si-Cr also showed a superior performance in density, moldability and saturated magnetic induction. (C) 2015 Elsevier B.V. All rights reserved.