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研究生： 蘇揚捷
Su, Yang-Chieh
論文名稱： 以雙氣體霧化及雷射積層製造製作Fe-Si-Al金屬基複合材及其磁性質之探討
Utilizing Dual-Jet Atomization and Additive Manufacturing to synthesize Fe-Si-Al Metal Matrix Composite and Study of its Magnetic Properties
指導教授： 曹紀元
Tsao, Chi-Yuan
學位類別： 碩士
Master
系所名稱： 工學院 - 材料科學及工程學系
Department of Materials Science and Engineering
論文出版年： 2018
畢業學年度： 106
語文別： 中文
論文頁數： 100
中文關鍵詞： 鐵矽合金 、雙氣體霧化法 、雷射積層製程 、軟磁複合材料 、磁性質
外文關鍵詞： Fe-6.5wt.%Si, Rapid-Solidifying Atomization, Selective Laser Melting(SLM), Soft magnetic Composites(SMCs), Magnetic properties
相關次數： 點閱：107  下載：7 
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    • 在磁性金屬材料當中，鐵矽合金一直以來都是廣為討論之鐵基合金，高矽量之鐵矽合金具有高電阻(80μΩ-cm)以及高相對導磁率(2.8*104)等優異之磁性質，但因為其較差之加工性，較難使用傳統滾軋加工成矽鋼片，由別於此，雷射積層加法製程的方式有助於改善鐵矽合金難加工之性質。
    在磁性領域中，為了解決高頻環境下磁性材料產生的渦流損耗，而發展出一種稱為軟磁複合材料(SMC, Soft Magnetic Composite)，不同於層狀絕緣的矽鋼片，絕緣體包覆於顆粒狀磁性體表面，具有更低的渦流損，並可以使用於三維之磁路環境，提升磁性材料的設計自由度。
    本研究利用快速凝固霧化製程製備Fe–6.5wt.%Si預合金粉末，製備出完全合金化之鐵矽基金屬圓球形粉末，以混合粉末方式混合純鋁粉末，將此混合粉末搭配雷射積層製程製備融結體塊材，希望藉由雷射積層製程參數調控製作出具備SMC結構之磁性複合材料，並且探討材料在此製程下製作的塊材其微結構、相組成與磁性質之相互關係。

    Fe-6.5wt. %Si pre-alloyed powders was synthesized by rapid-solidifying atomization(RSA) and we mixed it with Al powders was prepared by v-blender. The mixed powders were than consolidated into bulks by selective laser melting (SLM) with different laser scanning rates to achieve the Soft magnetic Composites(SMCs) structure. The effects of various laser scanning rate and segregation on the phase ratio, magnetic properties, microstructures, and mechanical property of SLM Fe-6.5wt. %Si/Al bulks were investigated.

    目錄 第一章 序論 1 1-1 前言 1 1-2 研究目標 2 第二章、文獻回顧與基礎理論 3 2-1 磁性基礎理論[1-6] 3 2-1-1 磁荷與磁場之關係 3 2-1-2 材料磁性來源 4 2-1-3 磁域自由能(Landau-Lifshitz free energy) 6 2-1-4 磁置曲線(M-H curve)之磁化機制 9 2-1-5 磁性質影響因子 10 2-1-6 磁損介紹 12 2-2 SMC 軟磁複合材料[11] 13 2-3 雙氣體霧化法(Dual-Jet Gas Atomization)[13] 14 2-3-1 雙氣體霧化製程 14 2-3-2 氣體霧化理論 15 2-4 粉末性質相關介紹 16 2-4-1 粉末堆積密度 16 2-4-2 粉末流動性 17 2-5 雷射製程 17 2-5-1 介紹 17 2-5-2 鍵結機制分類 18 2-5-3 雷射 19 2-5-4 粉末流動性 21 2-6 材料成分選擇 22 2-6-1 鐵矽合金 22 2-6-2 鋁 23 2-7 分析相關 24 2-7-1 X-射線繞射分析儀(X-Ray Diffractometer, XRD)[27-29] 24 2-7-2 震動磁量儀(Vibrating Sample Magnetometer, VSM)[2] 25 第三章、實驗方法及步驟 27 3-1 實驗流程 27 3-1-1 鐵矽合金粉末製備 27 3-1-2 混合粉末之製備 27 3-1-3 雷射積層製程 27 3-2 分析與量測 28 3-2-1 成份分析 28 3-2-2 粉末粒徑分篩 28 3-2-3 粉末視密度(Apparent density)測量 28 3-2-4 粉末流動性(Flow ability)分析 29 3-2-5 粉末雷射吸收率 29 3-2-6 金相製備與微結構分析 29 3-2-7 TEM 試片製作與分析 29 3-2-8 相分析 30 3-2-9 磁性質分析 30 第四章、結果與討論 32 4-1 雙氣體霧化鐵矽預合金粉末之結果 32 4-2 鐵矽預合金粉末成分分析 32 4-2-1 粉末外觀分析 32 4-2-2 鐵矽預合金粉末顯微組織分析 32 4-2-3 鐵矽預合金粉末相性質分析 32 4-2-4 鐵矽預合金粉末磁性質分析 33 4-3 混和粉之粉末性質 33 4-3-1 粉末混合度分析 33 4-3-2 粉末物理性質分析 33 4-4 混合粉末運用於選擇性雷射融結之單線分析 34 4-5 混合粉末運用於選擇性雷射融結之塊材分析 36 4-5-1 顯微組織與成份分析 36 4-5-2 相性質分析 38 4-5-3 藉由材料微結構與相性質分析推判掃描速率 39 4-5-4 磁性質分析 41 第五章、結論 43 參考文獻 46

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