【摘要】：鐵基塊體非晶具有高磁導(dǎo)率、低鐵損和低的矯頑力等優(yōu)異的軟磁性能,因而受到廣泛的研究。目前,高鐵含量的鐵基塊體非晶合金的臨界直徑仍然只有幾毫米。本文采用還原鐵粉、硼鐵和金屬硅等工業(yè)原料,以Fe-Ni-P-B-Si體系為研究對象,報道了一種制備塊體非晶合金的新工藝:超重力凝固法。同時,研究了超重力大小以及合金中P、B、Si比例的變化對超重力凝固制備塊體非晶合金的影響。通過10000g超重力凝固成功制備出Fe_(38)Ni_(38)(P_5B_2Si_3)_(2.4)合金鑄錠,鑄錠為直徑為10mm的近圓柱體。XRD分析與DSC測試顯示合金中非晶相比例較高,并對樣品的硬度與耐腐蝕性進(jìn)行測試,結(jié)果表明塊體非晶合金的平均顯微硬度為817.2HV,在3.5 wt%的NaCl溶液中測得的自腐蝕電流密度為1.5561×10-6A/cm2。研究了超重力大小對超重力凝固制備Fe_(38)Ni_(38)(P_5B_2Si_3)_(2.4)合金的影響。發(fā)現(xiàn)超重力場大小為1g到1000g之間時,沒有非晶相形成。當(dāng)超重力場大于2000g時,有非晶相形成。從2000g變到10000g,Fe_(38)Ni_(38)(P_5B_2Si_3)_(2.4)合金中非晶相的比例增多。隨著超重力場的增大,合金的平均顯微硬度增大,自腐蝕電流密度減小。研究了P/B/Si的比例對超重力凝固制備Fe_(38)Ni_(38)(P_xB_ySi_z)_(2.4)(x+y+z=10)合金時非晶形成的影響。發(fā)現(xiàn)P含量較高或B含量較高均可促進(jìn)非晶相的形成。當(dāng)P/B/Si的比例為5:2:3和6:2:2時,制備出了直徑為10mm的塊體非晶合金。當(dāng)P/B/Si的比例為3:5:2時,也易于制備塊體非晶合金。
[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.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TG139.8

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本文編號：2503198