本文選擇FeSiB合金體系為初始研究對象,研究了P元素的添加對鐵基非晶合金非晶形成能力、熱穩(wěn)定性、軟磁性能的影響。此外,還以FePC合金體系為初始研究對象,分別研究了Cu、Mo、N、Co等元素的添加對鐵基納米晶合金非晶形成能力、熱穩(wěn)定性、軟磁性能、耐腐蝕性和晶化組織結(jié)構(gòu)的影響。論文研究了P元素添加對FeSiB非晶合金非晶形成能力、熱穩(wěn)定性和軟磁性能的影響。結(jié)果表明,該合金帶材可以在大氣中制備,P元素的適量添加增加了合金熔體的團簇種類,同時P原子與Si、B原子有充分規(guī)避作用,因此提高了合金的非晶形成能力和熱穩(wěn)定性;所獲得的Fe79Si5B13P3非晶合金具有最佳軟磁性能,其飽和磁感應(yīng)強度在1.66T以上、低矯頑力Hc低于2.2A/m,與其它非晶成分相比,Bs處于國內(nèi)領(lǐng)先水平。論文研究了Cu及大原子尺寸Mo、Nb的添加對FePC合金軟磁性能、微觀組織和耐腐蝕性能的影響。結(jié)果表明,Cu元素在合金體系中能夠提高納米晶的形核密度;Mo和Nb元素的添加能夠有效地促進合金體系一次晶化相a-Fe的析出,同時抑制第二晶化相的析出;Nb元素比Mo元素具有更強的抑制第二晶化相析出和晶粒長大的作用。所獲得的F... 

【文章來源】：鋼鐵研究總院北京市

【文章頁數(shù)】：129 頁

【學位級別】：博士

【部分圖文】：

圖１－４非晶合金（ａ）和晶態(tài)金巧（ｂ）高分辨透射電子顯微鏡照片對比??

－??鋼鐵研巧總院巧±學位論文金的制備方法和制備設(shè)備的研制開發(fā)對該領(lǐng)域的發(fā)展起著主導(dǎo)作用，制備方法和設(shè)??備開發(fā)的創(chuàng)新與進步能大大促進非晶合金材料領(lǐng)域的發(fā)展。非晶合金目前的制備方??和工藝還有不足之處，還有很大的改進和發(fā)展空間，值得進一步研究［９２－９４］。??

和Ｎｂ元素后經(jīng)過適當溫度退火后，形成了在非晶基體上均勻分布的具有無規(guī)取向??直徑大小為１０－１５ｎｍ的ａ－Ｆｅ（Ｓｉ）晶粒的納米晶合金，該就是著名的牌號分＇Ｆｉｎｅｍｅｔ＂??的納米晶合金。圖１－７為該納米軟磁合金的組織結(jié)構(gòu)示意圖，圖１－８為該納米軟磁??合金晶化過程示意圖。自１９８８年Ｆｉｎｅｍｅｔ合金被成功開發(fā)Ｗ來，大量研巧者對非晶??合金退火過程中的微觀結(jié)構(gòu)演化進行了研巧，并期待開發(fā)出更優(yōu)性能的納米晶合金。??通過模仿Ｆｉｎｅｍｅｔ的結(jié)構(gòu)，采用非晶晶化法制備其他能形成納米晶結(jié)構(gòu)的新成分體??系。具體思路是由非晶晶化形成單一的納米晶相，使其微結(jié)構(gòu)具有如ｂｃｃ或者ｆｅｅ??結(jié)構(gòu)的簡單立方結(jié)構(gòu)。通過這種思路Ｓｕｚｗｋｉ等人［１９，１１６］成功開發(fā)出Ｆｅ－Ｍ－Ｂ??（Ｍ＝Ｚｒ，Ｈｆ，Ｔａ）系，即Ｎａｎｏｐｅｒｍ系的納米晶軟磁合金；１９９８年，Ｗｉｌｌａｒｄ等人［７２，７３］??開發(fā)出Ｆｅ－Ｃｏ－Ｚｒ－Ｂ－Ｃｕ系的納米晶合金，命名為＂Ｈｉｔｐｅｒｍ＂。??Ｃｕｆｆ?弟況化??ｍ??￣忘化Ｓｉ??．?圖１－７納米晶

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