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电感耦合等离子体质谱法测定硅钢中痕量铝钼钒钛铌 被引量:10
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作者 李杰 李洁 +1 位作者 张穗忠 于录军 《冶金分析》 CAS CSCD 北大核心 2013年第1期22-26,共5页
研究了应用电感耦合等离子体质谱(ICP-MS)同时测定硅钢中痕量铝、钼、钒、钛、铌元素的分析方法。通过条件试验对测量参数进行了优化,确定RF功率1 400 W,泵速30rpm,采样深度140,雾化压力0.90。样品采用硝酸分解,以Be、Y混合内标校正了... 研究了应用电感耦合等离子体质谱(ICP-MS)同时测定硅钢中痕量铝、钼、钒、钛、铌元素的分析方法。通过条件试验对测量参数进行了优化,确定RF功率1 400 W,泵速30rpm,采样深度140,雾化压力0.90。样品采用硝酸分解,以Be、Y混合内标校正了测量过程中高基体引起的信号漂移。根据测量时存在的质谱干扰情况,选择同位素27 Al、98 Mo、51 V、47 Ti和93 Nb作为测定同位素,同时通过调节仪器参数使得双电荷离子和氧化物离子的产率最低,以减少其带来的干扰。采用基体匹配法配制校准溶液,以标准加入法建立工作曲线,并扣除试剂空白。该方法各元素的测定下限均可达到1μg/g。用于硅钢标准样品的测定,所得结果与参考值完全吻合,各元素的RSD小于5.2%。 展开更多
关键词 电感耦合等离子体质谱 硅钢
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电感耦合等离子体原子发射光谱法测定核级铁铬铝合金中10种杂质元素 被引量:9
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作者 杨平 邓传东 +2 位作者 孙琳 盛红伍 安身平 《冶金分析》 CAS 北大核心 2019年第11期74-78,共5页
核级铁铬铝合金是非常重要的包壳材料,杂质元素含量对其性质有着十分重要的影响,因此需要准确测定其含量。采用硝酸-盐酸混合酸溶解,再加氢氟酸使样品完全溶解。选择Mn 257.610nm、Mo 204.598nm、Nb 295.088nm、Ni 231.604nm、Si 212.41... 核级铁铬铝合金是非常重要的包壳材料,杂质元素含量对其性质有着十分重要的影响,因此需要准确测定其含量。采用硝酸-盐酸混合酸溶解,再加氢氟酸使样品完全溶解。选择Mn 257.610nm、Mo 204.598nm、Nb 295.088nm、Ni 231.604nm、Si 212.412nm、Ta269.452nm、Ti 334.941nm、V 310.230nm、Y 371.030nm、Zr 327.305nm作为分析谱线,采用基体匹配法绘制校准曲线消除基体效应的影响,建立了电感耦合等离子体原子发射光谱法(ICP-AES)测定核级FeCrAl合金中Mn、Mo、Nb、Ni、Si、Ta、Ti、V、Y、Zr等10种杂质元素含量的方法。各元素在线性范围内,校准曲线线性相关系数均不小于0.9997;方法中各元素检出限为0.30~31μg/g。按照实验方法测定核级FeCrAl合金中10种杂质元素,结果的相对标准偏差(RSD,n=6)为1.1%~4.5%,加标回收率为95%~105%。 展开更多
关键词 核级铁铬铝合金 电感耦合等离子体原子发射光谱法(ICP-AES)
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Effect of Alloying on the Microstructure and Fracture Toughness of Nb-Mo-Si Alloys
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作者 Wei Qiang Li Yang Zheng Lijing Ma Chaoli Li Huanxi 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2009年第A03期58-61,共4页
It was found that typical Nbss /Nb5Si3 eutectic lamellar structure formed in the Nb-Mo-Si alloy. The interface between Nbss and Nb5Si3 phases was so strong that the alloy fractured mainly in the cleavage mode. In this... It was found that typical Nbss /Nb5Si3 eutectic lamellar structure formed in the Nb-Mo-Si alloy. The interface between Nbss and Nb5Si3 phases was so strong that the alloy fractured mainly in the cleavage mode. In this paper, the fourth element was added with the aim of modifying interface structure. The microstructural characterization and the fracture toughness of Nb-17Si-10Mo ternary alloy doped with Ga, In, Zn and V, respectively, were investigated. It was revealed that the lamellar structure maintained with the addition of Ga and In, whereas it changed slightly with Zn and V additions. Moreover, a little increase in fracture toughness of Nb-17Si-10Mo ternary alloy was obtained through the addition of Ga and Zn. 展开更多
关键词 共晶层状结构 铌钼硅合金 物理性能 结构分析
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NEWLY-DEVELOPED AND CHEAP NANOCRYSTALLINE Fe-Cu-Nb-Mo-Si-B ALLOYS FOR SWITCHING MODE POWER SUPPLY
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作者 Zhang, Y.Z. 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1997年第6期489-494,共6页
The synthetical soft magnetic properties were reported for newly-developed nanocrystalline Fe73.5Cu1Nb0.9 Mo2.1Si13.5B9 and Fe73.5Cu1Nb0.5 Mo2.5Si13.5B9 alloys. The levels of high-frequency losses of the new alloys ar... The synthetical soft magnetic properties were reported for newly-developed nanocrystalline Fe73.5Cu1Nb0.9 Mo2.1Si13.5B9 and Fe73.5Cu1Nb0.5 Mo2.5Si13.5B9 alloys. The levels of high-frequency losses of the new alloys are P3/100k=612 and 670 kWm-3, P2/200k=880 and 973kWm-3, P2/500k=4300 and 4600 kWm-3, P0.5/1000k=860 and 920 kWm-3, respectively. They are significantly lower than those of the superior power Mn-Zn ferrite H7c4. The dependence of core loss on frequency and amplitude flux density has been analyzed. The practical applications of the new alloys to switching mode power supplies with the output power of 1 and 2kW were reported. 展开更多
关键词 BORON Copper alloys Electric power systems Magnetic materials Molybdenum alloys Nanostructured materials Niobium alloys Silicon alloys
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