| Fe_(78)B_(13)Si_9非晶合金低温脆化的俄歇及高分辨电镜研究 |
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| 引用本文： | 黄金亮,助台荣一.Fe_(78)B_(13)Si_9非晶合金低温脆化的俄歇及高分辨电镜研究[J].兵器材料科学与工程,1998,21(4):7-11. |
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| 作者姓名： | 黄金亮 助台荣一 |
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| 作者单位： | 洛阳工学院，日本冈山理科大学，西安交通大学 |
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| 摘 要： | Ｆｅ７８Ｂ１３Ｓｉ９非晶合金的低温延－脆转变具有一阶段特征。经１ｈ等温退火，其脆化温度为２７０℃。采用俄歇电子能谱（ＡＥＳ）及高分辨电子显微镜（ＨＲＥＭ）分别研究了合金低温脆化前后的断口及微观结构。ＡＥＳ分析显示，脆化断口上有氧、硫杂质原子的偏聚。ＨＲＥＭ观察结果表明，合金淬态结构中存在有尺寸约１～３ｎｍ的类Ｆｅ２Ｂ及Ｆｅ３Ｂ短程有序区，脆化时长大至３～７ｎｍ。
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| 关 键 词： | 脆化 短程有序 俄歇能谱 高分辨电子显微术 |
EMBRITTLEMENT MECHANISM OF Fe 78 B 13 Si 9 AMORPHOUS ALLOY INVESTIGATED BY AES AND HREM |
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| Huang Jinliang.EMBRITTLEMENT MECHANISM OF Fe 78 B 13 Si 9 AMORPHOUS ALLOY INVESTIGATED BY AES AND HREM[J].Ordnance Material Science and Engineering,1998,21(4):7-11. |
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| Authors: | Huang Jinliang |
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| Affiliation: | Huang Jinliang,Department of Materials Engineering,Luoyang Institute of Technology P O Box 124,Luoyang 471039,Cao Xingguo,Sukedai Eiichi,Gu Haicheng |
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| Abstract: | One stage low temperature annealing embrittlement has been found in amorphous Fe 78 B 13 Si 9 at about 270℃.The fracture surfaces of the ductile and embrittled specimens have been analysed by AES and their microstructure have been observed by HREM.The results of AES show that the impure elements such as oxygen and sulfur have become segregated during low temperature annealing.Some Fe 2B-like and Fe 3B-like short range orders (SRO) with sizes about 1～3nm have existed in the as-quenched alloy and then slowly grown up to about 3～7nm on annealing to embrittlement temperature as have been confirmed by the HREM observation.It is thus concluded that the low temperature embrittlement of Fe 78 B 13 Si 9 amorphous alloy can be ascribed to the growth of Fe-B-like SRO and the segregation of oxygen and sulfur. |
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| Keywords: | embrittlement short range order AES HREM |
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