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研究生:黃泳誠
研究生(外文):Yong-cheng Huang
論文名稱:元素置換對Y-Fe-B系軟磁塊材非晶化之研究
論文名稱(外文):The study of elements substitutions on the glass-forming ability and magnetic properties of Y-Fe-B type bulk amorphous.
指導教授:張文成張文成引用關係
指導教授(外文):Wen-Cheng Chang
學位類別:碩士
校院名稱:國立中正大學
系所名稱:物理所
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:129
中文關鍵詞:非晶化非晶塊材非晶態
外文關鍵詞:glassbulk amorphousGFA
相關次數:
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本實驗以Y6Fe72B22 成分為基礎,嘗試藉由添加少量第四元素來提高非晶塊材尺寸,並期望提高其磁特性,同時對其熱性質作進一步研究。
於(Y0.06Fe0.72B0.22)96M4及(Y0.06Fe0.72B0.22)98M2合金中以M=Ti、Ta、Nb、Al、Hf與Zr作為第四元素添加,研究第四元素對其非晶化與磁特性之影響。其中Ta與Nb可使非晶態尺寸由直徑2 mm提升至3 mm,具有較佳的非晶效應;進一步嘗試以Ti為置換元素,期望可找出四元合金的最佳配比。其中,以成分為Y4Fe72B22Ti2之非晶尺寸可
達直徑3 mm,且其磁特性為σ10 kOe=126 emu/g,Hc=0.28 Oe與TC=289 ℃。在實驗中發現,Y含量的改變對合金結晶程序有相當大的影響。
另以四元合金成分Y4Fe72B22M2為研究方向,來探討M=Ti、Ta、Nb、Al與Hf對合金非晶化能力及軟磁特性。結果發現Y4Fe72B22Ta2成分可形成直徑4 mm之非晶態合金,其飽和磁化量σ10 kOe=123 emu/g,Hc=0.25 Oe與TC=298 ℃;最後,並研究Y6Fe72B22-xCx來研究C對合金的非晶化能力效應,其中Y6Fe72B21.8C0.2可形成直徑3 mm的非晶態合金,其飽和磁化量σ10 kOe=130 emu/g;Hc=0.37 Oe;TC=296 ℃。
Magnetic properties, glass-forming ability, and thermal stability of Y6Fe72B22 system bulk amorphous have been investigated. For (Y0.06Fe0.72B0.22)100-xMx series (M=Ti, Ta, Nb, Al, Hf, and Zr; x=0, 2, and 4), with the increase of M content, the saturation magnetization σ10kOe and Cure temperature TC decreased. Among them, Ta and Nb addition enhanced the glass-forming ability, which increased the diameter of bulk glassy rod from 2 mm for Y6Fe72B22 alloy to 3 mm for (Y0.06Fe0.72B0.22)98M2 and (Y0.06Fe0.72B0.22)96M4 (M=Ta and Nb) alloys. The optimal magnetic properties of σ10kOe=106 emu/g, Hc=0.33 Oe, and TC=247 ℃ were achieved in (Y0.06Fe0.72B0.22)98Nb2 alloy. The supercooled liquid region of ΔTx=65 ℃ in (Y0.06Fe0.72B0.22)96Nb4 alloy is maximum in these series alloy.
Substituting 2 at% Ti for Fe and B in Y6Fe70B22Ti2 and Y6Fe72B20Ti2 alloys, respectively, decreased the σ10kOe and the glass-forming ability. On the other hand, substitution of 2 at% Ti for Y in Y4Fe72B22Ti2 not only made the bulk glassy rod as large as 3 mm in diameter, but also resulted in the superior soft magnetic properties of σ10kOe=126 emu/g, and coercivity Hc=0.28 Oe.
Next, Ta, Nb, Al and Hf were adopted to substitute 2 at% for Y in the Y4Fe72B22M2 alloys. For Ta and Nb substitution, the diameter of bulk glassy rod can be enhanced from 2 mm for Y6Fe72B22 alloy to 4 mm for Y4Fe72B22M2 (M=Ta and Nb) alloys. Besides, Y4Fe72B22Ta2 had the optimal magnetic properties of σ10kOe=123 emu/g, Hc=0.25 Oe and TC =298 ℃. The supercooled liquid region of ΔTx=37 ℃ in Y4Fe72B22Ta2 alloy is maximum for Y4Fe72B22M2 series bulk. Finally, the effect of the glass-forming ability for C in Y6Fe72B22-xCx alloys was also investigated. The best glass-forming ability in Y-Fe-B-C alloys occurred when 0.2 at % C was added. Its maximum diameter of bulk amorphous is also as large as 3 mm. The supercooled liquid region of ΔTx=46 ℃ in Y6Fe72B21.8C0.2 alloy is maximum for Y6Fe72B22-xCx series.
中文摘要 i
英文摘要 ii
致謝 iv
目錄 v
表目錄 viii
圖目錄 ix
第一章 緒論 1
1-1磁性材料簡介 1
1-2軟磁材料簡介 3
1-3非晶質合金之特性 6
1-4非晶質合金之種類 9
1-5非晶磁性合金的磁性能及應用 11
1-6非晶態合金的發展歷史 13
1-7軟磁鐵芯的條件 15
1-8 Fe基非晶合金塊材之文獻資料 19
1-9實驗動機與目的 21
第二章 理論基礎 23
2-1磁性介紹 23
2-1-1磁性起源 23
2-1-2磁性體分類 26
2-2 非晶質合金之形成條件 29
2-3非晶質形成相關理論 31
2-4熔體過冷與非晶態轉變 35
2-3-1玻璃轉換溫度(Tg) 36
2-3-2臨界冷卻速率(critical cooling rate, Rc) 37
2-5形成非晶塊材合金的要素 39
2-4-1玻璃形成能力(glass forming ability, GFA) 39
2-4-2固溶原子的影響 41
2-4-3共晶點 42
2-4-4原子的鍵結特性 43
2-6非晶質合金之製造方法 44
第三章 實驗方法 46
3-1實驗流程 46
3-2合金設計理念 47
3-3合金塊材之製備 49
3-2-1合金成份的配製 49
3-2-2合金熔煉 49
3-2-3銅模鑄造法 50
3-4量測與分析 52
3-3-1結構鑑定-XRD 52
3-3-2磁性量測-VSM 52
3-3-3熱性質分析-DTA 53
3-3-4居裡溫度量測-TMA 53
第四章 結果與討論 55
4-1不同元素微量添加於Y6Fe72B22系統 55
4-1-1 (Y0.06Fe0.72B0.22)96M4 (M=Ti、Ta、Nb、Al、Hf及Zr)
之特性比較 57
4-1-2 (Y0.06Fe0.72B0.22)98M2 (M=Ti、Ta、Nb、Al、Hf及Zr)
之特性比較 67
4-2 Ti元素的添加對Y-Fe-B合金系統之影響 76
4-2-1 Y-Fe-B-Ti四元合金系統之非晶化及磁性值比較 77
4-2-2 Y6-xFe72B22Tix (x=1、2、3、4)之特性比較 81
4-3置換不同元素於Y4Fe72B22M2 92
4-3-1 Y4Fe72B22M2 (M=Ti、Ta、Nb、Al、Hf)
之特性比較 92
4-4 C對Y-Fe-B系統之特性分析 101
4-4-1 Y6Fe72B22-xCx之特性分析 102
第五章 結論 112
第六章 未來工作 114
第七章 參考文獻 115
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