惰性气体熔融–红外吸收法测定铌钨钽合金中氧

Determination of Oxygen in Niobium-Tungsten-Tantalum Alloy by Inert Gas Fusion Method

摘要: 铌钨钽合金作为航空航天结构件材料之一，杂质元素氧的含量高低直接影响其使用性能，准确测定其中氧含量至关重要。本文建立了惰性气体熔融–红外吸收法测定铌钨钽合金中氧含量的新方法。文中讨论了：助熔剂选择、样品质量、分析功率对铌钨钽合金中氧含量测定结果的影响。惰性气体熔融–红外吸收法测定铌钨钽合金中氧含量，该方法的检出限为0.00021%，定量限为0.00063%。方法应用于样品检测，检测结果的RSD为1.8%。该方法简单、快速、准确，能够满足产品检测需求，对产品质量控制有益。

Abstract: As one of the materials for aerospace structural components, the content of impurity element oxygen directly affects its performance, and accurate determination of oxygen content is crucial. An inert gas fusion method has been established for the direct determination of oxygen in Niobium-Tungsten-tantalum (NbWTa) alloy. Main factors discussed: sample weight, extraction power. The minimum analysis time is 40 s. The detection limit and lower quantitative limit for oxygen were 0.00021% and 0.00063%. The method was applied to sample detection, and the RSD of the detection results was 1.8%. The inert gas fusion-infrared method is simple, fast and accuracy. It has been applied to the pratical analysis with satisfactory results. It is meaningful in technical study and quality control.