Microstructural evolution in the transient solidification of monophasic and perite...
| Full text | |
| Author(s): |
Figueiredo, Caio M.
[1]
;
Castro, Jeyne P.
[1]
;
Speranca, Marco A.
[1]
;
Fialho, Lucimar L.
[1]
;
Nobrega, Joaquim A.
[1]
;
Pereira-Filho, Edenir R.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Quim, GAIA, POB 676, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Chemical Society; v. 29, n. 4, p. 680-688, APR 2018. |
| Web of Science Citations: | 2 |
| Abstract | |
In this study, two laser-based techniques, laser-induced breakdown spectroscopy (LIBS) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) were used for analytical signal evaluation of Ti, Al, and V and investigation of possible harmful elements eventually present as minor elements in Ti alloys. Due to the lack of certified reference materials, samples were also analyzed by wavelength dispersive X-ray fluorescence (WDXRF) and inductively coupled plasma optical emission spectrometry (ICP OES) after microwave-assisted digestion. To maximize the efficiency of LIBS and LA-ICP-MS, operational conditions were adjusted aiming to find optimal analytical performance. LIBS showed several Ti emission lines and few signals for Al and V. LA-ICP-MS was able to detect all three major constituents. For quantitative analysis, the correlation of intensity signals from LIBS analysis with reference values obtained by ICP OES was not successful, showing that there are still difficulties for quantification using solid samples. Measurements using ICP OES showed that additionally to major constituents, only Fe was present in concentrations around 0.2%. Analysis by WDXRF confirmed the presence of Fe. Results using both methods, i.e., ICP OES and WDXRF, were in good agreement. (AU) | |
| FAPESP's process: | 16/17221-8 - Composition evaluation of hard discs from electronic waste using spectroanalytical techniques: rare earth and noble metals determination |
| Grantee: | Jeyne Pricylla de Castro |
| Support type: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 16/01513-0 - Laser-Induced Breakdown Spectroscopy (LIBS) application in the analyses of electronic waste (printed circuit boards and polymers), food and difficult preparation liquid samples |
| Grantee: | Edenir Rodrigues Pereira Filho |
| Support type: | Regular Research Grants |
| FAPESP's process: | 14/22408-4 - Use of Laser-Induced Breakdown Spectroscopy (LIBS) for direct alloys analyses |
| Grantee: | Jeyne Pricylla de Castro |
| Support type: | Scholarships in Brazil - Master |