Enhancement of Glass-forming Ability of CoFeBSiNb Bulk Glassy Alloy with Good Soft-magnetic Properties
文献类型：会议论文
| 作者 | Man QK ; Sun HJ ; Dong YQ ; Shen BL |
| 出版日期 | 2009-12-29 |
| 会议名称 | The 16th International Symposium on Metastable, Amorphous and Nanostructured Materials |
| 会议日期 | 2006-7 |
| 会议地点 | 北京 |
| 中文摘要 | The effect of B and Si concentration ratio on the glass-forming ability (GFA) of Co46Fe20B22+xSi6-xNb6 (x=0–2) glassy alloys was investigated. By copper mold casting, bulk glassy alloys of Co46Fe20B22+xSi6-xNb6 with diameters up to 4.5 mm were synthesized in the compositions of x=1. The additions of 23at% B combined with 5at% Si was found to be effective for the extension of the supercooled liquid region (∆Tx) defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx). The ∆Tx value is 51 K for the Co46Fe20B22Si6Nb6 alloy, and increases to 55 K for the Co46Fe20B23Si5Nb6 glassy alloy. In addition, this glassy alloy exhibits a highly reduced glass transition temperature (Tg/Tl) of 0.64 and in the compositions of x=1 was found to be in approaching alloy to a eutectic point. Large ∆Tx, high Tg/Tl and in approaching alloy to a eutectic point enabled us to prepare the Co46Fe20B23Si5Nb6 bulk glassy alloy successfully with a diameter of 4.5 mm. In addition to high glass-forming ability, the bulk glassy alloys exhibit excellent soft-magnetic properties, i.e., high saturation magnetization of 0.63–0.69 T, low coercive force of 1.17–2.35A/m, high effective permeability at 1 kHz of 1.36–2.65×104. The mechanisms for the high glass-forming ability and excellent soft-magnetic properties of the Co44Fe20B22+xSi6-xNb6 (x=0–2) glassy alloys are discussed. |
| 收录类别 | 其它 |
| 合作状况 | 国内 |
| 语种 | 英语 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/166]  |
| 专题 | 宁波材料技术与工程研究所_宁波所知识产出 |
| 推荐引用方式 GB/T 7714 | Man QK,Sun HJ,Dong YQ,et al. Enhancement of Glass-forming Ability of CoFeBSiNb Bulk Glassy Alloy with Good Soft-magnetic Properties[C]. 见:The 16th International Symposium on Metastable, Amorphous and Nanostructured Materials. 北京. 2006-7. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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