Abstract：The content of oxygen in nickel-titanium shape-memory alloy directly influence on the memory and mechanical properties of alloy, so it should be strictly controlled. For block and powder samples, the experimental conditions including instrument power, flux type and sample mass were optimized and selected by single factor method. The analysis method of oxygen content in block/powder nickel-titanium shape-memory alloy by inert gas fusion-infrared absorption spectrometry was established. 0.06-0.12g of sample was weighed according to the oxygen content. The determination was conducted at power of 5.0-5.5kW using nickel foil-nickel basket as the flux. The limit of quantification was 0.0008%. The actual nickel-titanium shape-memory alloy sample was analyzed. The relative standard deviations (RSD, n=7) of determination results were less than 4%, and the spiked recoveries were between 96% and 104%.
王长华, 墨淑敏, 王伟华, 胡芳菲, 韩维儒, 李娜. 惰气熔融-红外吸收光谱法测定镍钛形状记忆合金中氧[J]. 冶金分析, 2020, 40(11): 86-90.
WANG Chang-hua, MO Shu-min, WANG Wei-hua, HU Fang-fei HAN Wei-ru, LI Na. Determination of oxygen in nickel-titanium shape-memory alloy by inert gas fusion-infrared absorption spectrometry. , 2020, 40(11): 86-90.
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