超重力凝固制备FeNiPBSi块体非晶合金
发布时间：2019-06-20 11:48
【摘要】：铁基块体非晶具有高磁导率、低铁损和低的矫顽力等优异的软磁性能,因而受到广泛的研究。目前,高铁含量的铁基块体非晶合金的临界直径仍然只有几毫米。本文采用还原铁粉、硼铁和金属硅等工业原料,以Fe-Ni-P-B-Si体系为研究对象,报道了一种制备块体非晶合金的新工艺:超重力凝固法。同时,研究了超重力大小以及合金中P、B、Si比例的变化对超重力凝固制备块体非晶合金的影响。通过10000g超重力凝固成功制备出Fe_(38)Ni_(38)(P_5B_2Si_3)_(2.4)合金铸锭,铸锭为直径为10mm的近圆柱体。XRD分析与DSC测试显示合金中非晶相比例较高,并对样品的硬度与耐腐蚀性进行测试,结果表明块体非晶合金的平均显微硬度为817.2HV,在3.5 wt%的NaCl溶液中测得的自腐蚀电流密度为1.5561×10-6A/cm2。研究了超重力大小对超重力凝固制备Fe_(38)Ni_(38)(P_5B_2Si_3)_(2.4)合金的影响。发现超重力场大小为1g到1000g之间时,没有非晶相形成。当超重力场大于2000g时,有非晶相形成。从2000g变到10000g,Fe_(38)Ni_(38)(P_5B_2Si_3)_(2.4)合金中非晶相的比例增多。随着超重力场的增大,合金的平均显微硬度增大,自腐蚀电流密度减小。研究了P/B/Si的比例对超重力凝固制备Fe_(38)Ni_(38)(P_xB_ySi_z)_(2.4)(x+y+z=10)合金时非晶形成的影响。发现P含量较高或B含量较高均可促进非晶相的形成。当P/B/Si的比例为5:2:3和6:2:2时,制备出了直径为10mm的块体非晶合金。当P/B/Si的比例为3:5:2时,也易于制备块体非晶合金。
[Abstract]:The iron-based bulk amorphous has excellent soft magnetic properties such as high magnetic permeability, low iron loss and low coercive force. At present, the critical diameter of the iron-based bulk amorphous alloy with high iron content is still only a few millimeters. In this paper, the Fe-Ni-P-B-Si system is used as the research object, and a new process for preparing the bulk amorphous alloy is reported in this paper. At the same time, the influence of the change of the ratio of P, B and Si in the supergravity on the preparation of bulk amorphous alloy was studied. Fe _ (38) Ni _ (38) (P _ 5B _ 2Si _ 3) _ (2.4) alloy ingot was prepared by the super-gravity solidification of 10000 g, and the ingot was a near-cylinder with a diameter of 10 mm. The results show that the average microhardness of the bulk amorphous alloy is 817.2 HV, and the self-corrosion current density measured in 3.5 wt% NaCl solution is 1.5561/10-6A/ cm2. The effect of supergravity on the preparation of Fe _ (38) Ni _ (38) (P _ 5B _ 2Si _ 3) _ (2.4) alloy by supergravity solidification is studied. When the super-gravity field was found to be between 1 g and 1000 g, no amorphous phase was formed. When the super-gravity field is more than 2000 g, an amorphous phase is formed. The proportion of amorphous phase in Fe _ (38) Ni _ (38) (P _ 5B _ 2Si _ 3) _ (2.4) alloy increased from 2000 g to 10 000 g. With the increase of the super-gravity field, the average microhardness of the alloy is increased, and the self-corrosion current density is reduced. The effect of P/ B/ Si ratio on the amorphous formation of Fe _ (38) Ni _ (38) (P _ xB _ ySi _ z) _ (2.4) (x + y + z = 10) alloy was studied. It was found that higher P content or higher B content could promote the formation of amorphous phase. When the ratio of P/ B/ Si is 5:2:3 and 6:2:2, the bulk amorphous alloy with a diameter of 10 mm is prepared. The bulk amorphous alloy is also easily prepared when the ratio of p/ b/ si is 3:5:2.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG139.8
[Abstract]:The iron-based bulk amorphous has excellent soft magnetic properties such as high magnetic permeability, low iron loss and low coercive force. At present, the critical diameter of the iron-based bulk amorphous alloy with high iron content is still only a few millimeters. In this paper, the Fe-Ni-P-B-Si system is used as the research object, and a new process for preparing the bulk amorphous alloy is reported in this paper. At the same time, the influence of the change of the ratio of P, B and Si in the supergravity on the preparation of bulk amorphous alloy was studied. Fe _ (38) Ni _ (38) (P _ 5B _ 2Si _ 3) _ (2.4) alloy ingot was prepared by the super-gravity solidification of 10000 g, and the ingot was a near-cylinder with a diameter of 10 mm. The results show that the average microhardness of the bulk amorphous alloy is 817.2 HV, and the self-corrosion current density measured in 3.5 wt% NaCl solution is 1.5561/10-6A/ cm2. The effect of supergravity on the preparation of Fe _ (38) Ni _ (38) (P _ 5B _ 2Si _ 3) _ (2.4) alloy by supergravity solidification is studied. When the super-gravity field was found to be between 1 g and 1000 g, no amorphous phase was formed. When the super-gravity field is more than 2000 g, an amorphous phase is formed. The proportion of amorphous phase in Fe _ (38) Ni _ (38) (P _ 5B _ 2Si _ 3) _ (2.4) alloy increased from 2000 g to 10 000 g. With the increase of the super-gravity field, the average microhardness of the alloy is increased, and the self-corrosion current density is reduced. The effect of P/ B/ Si ratio on the amorphous formation of Fe _ (38) Ni _ (38) (P _ xB _ ySi _ z) _ (2.4) (x + y + z = 10) alloy was studied. It was found that higher P content or higher B content could promote the formation of amorphous phase. When the ratio of P/ B/ Si is 5:2:3 and 6:2:2, the bulk amorphous alloy with a diameter of 10 mm is prepared. The bulk amorphous alloy is also easily prepared when the ratio of p/ b/ si is 3:5:2.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG139.8
【参考文献】
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