铁基非晶结构演变对条带磁性和韧脆性的影响

发布时间：2018-06-15 15:15

本文选题：铁基非晶 + 非晶形成能力　；参考：《沈阳工业大学》2017年硕士论文

【摘要】：随着能源的急剧消耗,研究者们开发了一种新型材料—铁基非晶。这种合金具有优异的软磁性能、力学性能和低廉的价格,广泛的应用于电机、变压器、电抗器、电感线圈等方面,成为一种新型的结构与功能材料。然而,铁基非晶存在的不足就是条带退火后出现脆化。因此研究成分、退火对条带磁性跟韧脆性的影响具有重要的意义。本文主要研究了Fe_(78)Si_9B_(13)、Fe_(83)C_1B_(11)Si_2P_3两种合金条带在不同退火时间、退火温度下的磁性和韧脆性,并且得出了条带最佳的热处理状态。由于条带韧脆性跟泊松比、原子之间的不匹配度以及原子之间的键有关,铁含量的变化会引起这三者的变化,以Fe_(83-x)(C_1B_(11)Si_2P_3)_((1+x/17))(x=0,3,6,9和12)合金体系为研究对象,研究其非晶形成能力、热稳定性、晶化激活能、析出相、磁性以及韧脆性。考虑到Fe_(83)C_1B_(11)Si_2P_3的居里温度比Fe_(78)Si_9B_(13)居里温度低很多,以及Ni元素的泊松比比Fe元素的泊松比大,为了验证低的居里温度是否有利于条带的韧脆性,继续研究(Fe_((1-x))Ni_x)_(78)Si_4B_(13)P_5(x=0,0.2,0.4,0.6,0.8)合金体系,包括非晶形成能力、热稳定性、磁性以及韧脆性。研究发现,Fe_(78)Si_9B_(13)在713K及以上温度退火时,短时间内就能够改善矫顽力,而Fe_(83)C_1B_(11)Si_2P_3在633K退火时,退火10min才能明显降低矫顽力。另外对于Fe_(83-x)(C_1B_(11)Si_2P_3)_((1+x/17)),铁含量为83at.%的合金条带在最佳退火前后都具有良好的弯曲韧性,然而,当合金条带的铁含量为71at.%,条带淬态就表现出脆性特征。带材的韧脆转变温度比随铁含量增加最佳软磁性能对应温度降低的更快,另外,随铁含量的增加最佳退火温度向低温移动。(Fe_((1-x))Ni_x)_(78)Si_4B_(13)P_5的研究证实了低的居里温度不是影响条带韧脆性的主要因素,我们发现当变量x的值为0.8时,条带为顺磁性,矫顽力较大。
[Abstract]:With the rapid consumption of energy, researchers have developed a new material-iron-based amorphous. The alloy has excellent soft magnetic properties, mechanical properties and low price. It is widely used in motor, transformer, reactor, inductor coil and so on. It has become a new type of structure and function material. However, the defect of Fe-based amorphous is the embrittlement after annealing. Therefore, it is of great significance to study the effects of composition and annealing on the magnetic properties and ductile brittleness of the strip. In this paper, the magnetic properties and ductile brittleness of FeD / 78Si9B / C / C _ 1B / C _ 1B / C _ 1B / C _ 1 / C _ 1B _ 1 / C _ 1C _ 1 / C _ 1 / C _ 1 / C _ 1B _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C / C _ (11) Si / P _ 3 alloy strips at different annealing temperatures and ductile brittleness are studied. Because the ductile brittleness of the strip is related to Poisson's ratio, the mismatch between atoms and the bond between atoms, the change of iron content will lead to the change of these three. The amorphous forming ability of the FeStue 83-xDX C _ 1B / T _ 1B _ (1) P _ (1) / T _ (3) P ~ (3 / P) / S _ (1 / 17) / T _ (1 / 17) / T _ (39) / 12) alloy system is studied. The results show that the structure of the band-ductile-brittle strip is related to the Poisson ratio, the mismatch between atoms and the bond between atoms. Thermal stability, crystallization activation energy, precipitates, magnetism and ductile brittleness. In view of the fact that the Curie temperature of the Serge C1Si2P3 is much lower than the Curie temperature of Feti78Si9BP3, and that the Poisson's ratio of Ni is larger than that of Fe, and that, in order to verify whether a low Curie temperature is conducive to the brittleness of the strip, to continue the study of the NixSerg / NixT / NixS / 78BSP / Si _ 4BS _ 3P _ _ _ It includes amorphous forming ability, thermal stability, magnetism and ductile brittleness. It is found that at 713K and above, the coercivity can be improved in a short period of time, while the 10min can reduce the coercivity obviously only when the Fetit _ (83) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1). In addition, the alloy strip containing 83at.% iron has good flexural toughness before and after the optimum annealing. However, when the iron content of the alloy strip is 71at.1.When the iron content of the alloy strip is 71at.1.The strip quench shows brittleness characteristic when the iron content of the alloy strip is 71at.1.In addition, when the iron content of the alloy strip is 71at.Without, the alloy strip with 83at.percent iron content has a good flexural toughness before and after the best annealing. The ductile-brittle transition temperature of the strip decreases faster than the corresponding temperature of the optimum soft magnetic properties with the increase of iron content. With the increase of iron content, the optimum annealing temperature moves to low temperature. The study of NixAK / T _ (78) Si4B / T _ (13) P _ (5) confirms that low Curie temperature is not the main factor affecting the ductile brittleness of the strip. It is found that when the variable x is 0.8, the strip is paramagnetic, and the coercivity is greater.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG139.8

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