Temperature effect on the optical emission intensity in laser induced breakdown spectroscopy of super alloys

Abstract

In this paper, the influence of heating and cooling samples on the optical emission spectra and plasma parameters of laser-induced breakdown spectroscopy for Titanium 64, Inconel 718 super alloys, and Aluminum 6061 alloy is investigated. Samples are uniformly heated up to approximately 200°C and cooled down to -78°C by an external heater and liquid nitrogen, respectively. Variations of plasma parameters like electron temperature and electron density with sample temperature are determined by using Boltzmann plot and Stark broadening methods, respectively. Heating the samples improves LIBS signal strength and broadens the width of the spectrum. On the other hand, cooling alloys causes fluctuations in the LIBS signal and decrease it to some extent, and some of the spectral peaks diminish. In addition, our results show that electron temperature and electron density depend on the sample temperature variations.

A critical review of recent progress in analytical laser-induced breakdown spectroscopy

“…Some of the findings of these studies related to the gas atmosphere were alluded to in the BGas atmosphere^section. Increased sample temperature was generally found to increase LIBS signal intensities and improve S/N ratios [217]. The instrumentation and methods developed for space LIBS applications are best represented in the numerous publications related to the ChemCam Mars Science Laboratory Rover Project.…”

Sample Temperature Effect on Steel Measurement Using SP-LIBS and Collinear Long-short DP-LIBS

“…Renwei LIU, 1,2) Kai RONG, 3) Zhenzhen WANG, 2,3) Minchao CUI, 2,4) Yoshihiro DEGUCHI, 2,3) * Seiya TANAKA, 2) Junjie YAN 2,3) and Jiping LIU 1) 1) Moe Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, No. 28 November 15, 2019; accepted on January 22, 2020; J-STAGE Advance published date: February 28, 2020) Laser induced breakdown spectroscopy (LIBS) has been investigated as a potential multi-element quantitative analysis tool for the quality control of on-line steel production. This research investigated influence of sample temperature on steel sample measurement using collinear long-short dual-pulse LIBS (long-short DP-LIBS) and single-pulse LIBS (SP-LIBS).…”

“…High sample temperature is an effective way to improve total ablation mass. 28) The maximum ablated amount of sample M was calculated by following equation: 19)…”

Effect of sample temperature on laser-induced semiconductor plasma spectroscopy

“…Similar enhancement also is observed when the sample is heated up to a higher temperature. We speculate that increasing the laser intensity and the sample temperature can produce a large amount of ablated materials [30] . In order to understand these characteristics we investigate different semiconductor materials (germanium and silicon) and a similar conclusion is obtained.…”