Improving the degradation and magnetization performance of FePC amorphous alloys by annealing treatment

IF 6.6 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Z. G. Qi, Q. Chen, Z. X. Wang, Z. Q. Song, K. B. Kim, J. Pang, X. H. Zhang, W. M. Wang
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Abstract

The Fe80PxC20-x ingots and amorphous ribbons (4.5 ≤ x ≤ 6.5) are arc melted and melt spun respectively. The Rhodamine B degradation performance of as spun and annealed ribbons are investigated with various methods. In present alloys, increasing P content (cP) can inhibit the precipitation of primary α-Fe and graphite phases, and promote the formation of eutectic α-Fe + Fe3C + Fe3P phases in ingots and annealed ribbons. With increasing annealing temperature (Tan), the primary α-Fe grain size of the ribbons with cP = 4.5 at.% increases gradually and that of the ribbons with cP = 6.5 at.% increases firstly and then decreases. The degradation performance and reusability of the ribbons show a similar Tan-dependent behavior, which can be explained by the size effect of the galvanic cells. Meanwhile, the saturation magnetisation Bs and coercivity Hc of the ribbons with cP = 4.5 and 6.5 at.% increase with increasing Tan, showing a near-linear change of the reaction rate constant k against ln (Bs·Hc). This work not only studies the mechanism of improving degradation performance for FePC amorphous alloys by annealing treatment, but also reveals a correlation between degradation performance and magnetization performance of FePC alloys.

Abstract Image

通过退火处理改善 FePC 非晶合金的降解和磁化性能
分别采用电弧熔化和熔融纺丝的方法制备了 Fe80PxC20-x 晶锭和非晶带(4.5 ≤ x ≤ 6.5)。通过各种方法研究了纺丝和退火带的罗丹明 B 降解性能。在目前的合金中,增加 P 含量(cP)可抑制原生 α-Fe 和石墨相的析出,促进铸锭和退火带中共晶 α-Fe + Fe3C + Fe3P 相的形成。随着退火温度(Tan)的升高,cP = 4.5 at.%的带材的主α-Fe晶粒尺寸逐渐增大,cP = 6.5 at.%的带材的主α-Fe晶粒尺寸先增大后减小。带材的降解性能和可重复使用性表现出类似的谭氏依赖性,这可以用电化电池的尺寸效应来解释。同时,随着 Tan 值的增加,cP = 4.5 和 6.5 at.% 的带材的饱和磁化率 Bs 和矫顽力 Hc 也在增加,反应速率常数 k 与 ln(Bs-Hc)呈近似线性变化。这项工作不仅研究了退火处理改善 FePC 非晶合金降解性能的机制,还揭示了 FePC 合金降解性能与磁化性能之间的相关性。
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来源期刊
npj Materials Degradation
npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
7.80
自引率
7.80%
发文量
86
审稿时长
6 weeks
期刊介绍: npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies
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