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| Study on sampling method for direct quantitative analysis of multi-element in stainless steel powders |
| LIU Zong-xin1，2, SHEN Xue-jing1，2, LI Dong-ling1，2, LIU Jia3 |
| New Metallurgy Hi-Tech Group Co. LTD, Beijing 100081,China |
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Abstract Traditional quantitative analysis methods of metal powders need to the process of chemical dissolution or melt pressing. In this paper, a laser-induced breakdown spectroscopy (LIBS) method for direct quantitative analysis of stainless steel powders without melting or chemical sample preparation is proposed. The effects of different sample preparation methods and laser ablation conditions on the quantitative analysis results in stainless steel powders were studied. It was found that the material of the sample mould had an important influence on the effect of sample preparation. The stability and accuracy of the analysis results were greatly improved by appropriate sample preparation pressure. At the same time, the choice of laser ablation times will also affect the stability of spectral signals. Basis on these studies, a sample preparation and quantitative analysis method for direct quantitative analysis of nine elements in stainless steel powder by LIBS were established. The analysis results of Mo, Si, W, Ni, Mn, Cr and Co have good consistency with the results obtained by the corresponding element reference value of chemical analysis.
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Received: 24 January 2019
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Corresponding Authors:
沈学静（1974—）,女，博士，教授，主要研究方向为材料基因工程高通量表征领域。
E-mail: 522826135@qq.com
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2020, Vol. 30 
