1. AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China; 2. Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing 100095, China; 3. Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation, Aero Engine Corporation of China, Beijing 100095, China; 4. Aviation Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation, Beijing 100095, China
Abstract：The accurate determination of micro and trace elements in powder metallurgy superalloys is of great significance for the production and application of powder metallurgy superalloys. The glow discharge excitation of samples was carried out at a discharge current of 40-45 mA, a discharge voltage of 1 100-1 200 V and an argon gas flow rate of 400-450 mL/min. Proper isotopes and resolutions were selected to eliminate the mass spectrometry interferences. The relative sensitivity factor (RSF) of each testing element was calibrated using internal control sample and certified reference materials with matrix matching. The determination of 26 micro and trace elements in powder metallurgy superalloy (including B, Na and Mg) by fast-flow and high-resolution glow discharge mass spectrometry (GDMS) was realized. The contents of 26 micro and trace elements in internal control sample of powder metallurgy superalloy were determined according to the experimental method. The found results of each element were basically consistent with the reference values. The relative standard deviations (RSD, n=6) of determination results were between 0.9% and 15.4%. The proposed method was applied for the determination of powder metallurgy superalloy sample, and the found results were consistent with other methods: inductively coupled plasma atomic emission spectrometry (ICP-AES) for B, Fe and Zr; high frequency induction combustion-infrared absorption method for S; atomic fluorescence spectrometry (AFS) for Se; high resolution-inductively coupled plasma mass spectrometry (HR-ICP-MS) for other elements(Na,Mg,Si,P,Ca,V,Mn,Cu,Ga,As,Ag,Sn,Sb,Te,La,Ce,Hf,Ta,Tl,Pb,Bi). The RSDs (n=6) of the results were between 0.2% and 26.6%.
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