激光诱导击穿光谱
材料科学
产量(工程)
激光器
光谱学
压力(语言学)
弹性后坐力检测
能量(信号处理)
分析化学(期刊)
复合材料
光学
纳米技术
物理
化学
薄膜
语言学
哲学
色谱法
量子力学
作者
Shuhang Gong,Yaju Li,D B Qian,Jinrui Ye,Kevin Zhao,Qiang Zeng,Liangwen Chen,Shaofeng Zhang,Lei Yang,Xiaofeng Ma
标识
DOI:10.1088/1674-1056/ad12a9
摘要
Abstract Taking three typical soft samples prepared respectively by loose packings of 72, 100 and 109 μm copper grains as examples, we perform an experiment to investigate the energy dependent laser-induced breakdown spectroscopy (LIBS) of soft materials. We discover a reversal phenomenon in the trend of energy dependence of plasma emission intensity: increasing initially and then decreasing separated by a well-defined critical energy. The trend reversal is attributed to the laser-induced recoil pressure at the critical energy just matching the sample’s yield strength. As a result, a one-to-one correspondence can be well established between the samples’ yield stress and the critical energy that is easily obtainable from LIBS measurements. This allows us to propose an innovative method for estimating the yield stress of soft materials via LIBS with attractive advantages including in-situ remote detection, real-time data collection, and minimal destructive to sample.
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