After one of the B atoms in Fe73.5Cu1Nb3Si13.5B9 alloy was replaced by both 0.7 Si and 0.3 Co, Fe73.5Co0.3Cu1Nb3Si14.2B8 alloy ribbons were prepared by single roll fast quenching method. The obtained alloy ribbons were subsequently wound into ring magnetic cores, and then these magnetic cores were annealed at different temperatures in air. The effects of adding Co on the crystallization behavior and soft magnetic properties of the as-quenched alloy ribbons with and without heat treatment were studied. The results show that the amorphous structure of the prepared Fe73.5Co0.3Cu1Nb3Si14.2B8 alloy ribbons is transformed into the coexistence of amorphous and nanocrystalline structures after heat treatment at 550°C. Comparing with Fe73.5Cu1Nb3Si13.5B9 alloy ribbons, the first initial crystallization temperature ( ) and crystallization peak temperature ( ) of Fe73.5Co0.3Cu1Nb3Si14.2B8 alloy ribbons were reduced by 1.6 and 1.7°C, respectively, While the second initial crystallization temperature ( ) and crystallization peak temperature ( ) were increased by 6.5 and 5.7°C, respectively, resulting in that the difference between the first and the second initial crystallization temperatures ( ) are increased by 8.1°C; the initial permeability ( ) and saturation induction density ( ) of the amorphous/nanocrystalline Fe73.5Co0.3Cu1Nb3Si14.2B8 magnetic cores were reduced by 0.15 H/m and 0.39 T, respectively, while the coercivity ( ) is increased by 0.34 A/m.

中文翻译：

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添加Co对非晶/纳米晶FeCuNbSiB合金带材结晶行为和磁阻效应的影响

将Fe73.5Cu1Nb3Si13.5B9合金中的一个B原子同时替换为0.7 Si和0.3 Co后，采用单辊快速淬火法制备了Fe73.5Co0.3Cu1Nb3Si14.2B8合金薄带。随后将得到的合金带缠绕成环形磁芯，然后将这些磁芯在空气中在不同温度下退火。研究了Co的添加对热处理和不热处理的淬火态合金薄带结晶行为和软磁性能的影响。结果表明，所制备的Fe73.5Co0.3Cu1Nb3Si14.2B8合金薄带经550℃热处理后，非晶组织转变为非晶与纳米晶共存。与Fe73.5Cu1Nb3Si13.5B9合金薄带相比，Fe73.5Co0.3Cu1Nb3Si14.2B8合金薄带的第一初始结晶温度（ ）和结晶峰温度（ ）分别降低了1.6和1.7℃，而第二初始结晶温度（ ）和结晶峰温度（ ）升高分别增加6.5和5.7°C，导致第一和第二初始结晶温度之间的差异( )增加了8.1°C；非晶/纳米晶 Fe73.5Co0.3Cu1Nb3Si14.2B8 磁芯的初始磁导率 ( ) 和饱和感应密度 ( ) 分别降低了 0.15 H/m 和 0.39 T，而矫顽力 ( ) 增加了 0.34 A/m . 而第二初始结晶温度（ ）和结晶峰温度（ ）分别增加了6.5和5.7℃，导致第一和第二初始结晶温度（ ）的差值增加了8.1℃；非晶/纳米晶 Fe73.5Co0.3Cu1Nb3Si14.2B8 磁芯的初始磁导率 ( ) 和饱和感应密度 ( ) 分别降低了 0.15 H/m 和 0.39 T，而矫顽力 ( ) 增加了 0.34 A/m . 而第二初始结晶温度（ ）和结晶峰温度（ ）分别增加了6.5和5.7℃，导致第一和第二初始结晶温度（ ）的差值增加了8.1℃；非晶/纳米晶 Fe73.5Co0.3Cu1Nb3Si14.2B8 磁芯的初始磁导率 ( ) 和饱和感应密度 ( ) 分别降低了 0.15 H/m 和 0.39 T，而矫顽力 ( ) 增加了 0.34 A/m .