Crystallization behavior and magnetic properties of Cu-containing Fe-Cr-Mo-Ga-P-C-B alloys
Crystallization behavior and magnetic properties of Cu-containing Fe-Cr-Mo-Ga-P-C-B alloys
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DOI：
10.1063/1.2234536
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发表时间：
2006-08-15
影响因子：
3.2
通讯作者：
Greneche, J. M.
中科院分区：
文献类型：
--
作者：
Borrego, J. M.;Conde, C. F.;Greneche, J. M.
多元非晶合金Fe65.5Cr4Mo4Ga4P12C5B5.5具有良好的软磁性能和较大的非晶形成能力。为了寻找可以改善其磁性能的纳米晶结构，用Cu部分取代Cr和Mo。含铜合金的失透过程显示出一个额外的广泛的结晶事件，可以描述的阿夫拉米定律，与指数接近统一，典型的纳米晶化现象。纳米晶合金的微观结构由嵌入在非晶基体中的平均晶粒尺寸为5-10 nm的Fe（Ga）纳米晶体组成。发现在纳米晶化过程结束时实现的最大结晶体积分数为约20%，并且对于具有高Cu含量的合金，观察到许多较大尺寸（类似于40 nm）的晶体。结合使用X射线衍射和穆斯堡尔谱允许估计的纳米晶晶粒和纳米晶合金的非晶残留相的组合物。在纳米晶化过程结束时，所研究的合金的复杂的超精细结构的特征在于。(c)2006年，美国物理学会。
Multicomponent Fe65.5Cr4Mo4Ga4P12C5B5.5 amorphous alloy is known to have good soft magnetic properties combined with large glass-forming ability. Searching for a nanocrystalline structure that could improve its magnetic properties, Cr and Mo were partially substituted by Cu. The devitrification process of Cu-containing alloys shows an additional broad crystallization event that can be described by an Avrami law, with an exponent close to unity, typical for nanocrystallization phenomena. The microstructure of the nanocrystalline alloys consists of Fe(Ga) nanocrystals with a mean grain size of 5-10 nm embedded in an amorphous matrix. The maximum crystalline volume fraction achieved at the end of the nanocrystallization process was found to be of around 20% and for alloys with high Cu content a number of crystals of larger size (similar to 40 nm) were observed. The combined use of x-ray diffraction and Mossbauer spectrometry allowed to estimate the compositions of both the nanocrystalline grains and the amorphous residual phase of nanocrystalline alloys. The complex hyperfine structure of the studied alloys at the end of the nanocrystallization process was characterized. (c) 2006 American Institute of Physics.