PMID- 36739359
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230206
LR  - 20230207
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 13
IP  - 1
DP  - 2023 Feb 4
TI  - Parametric study of pulsed nanosecond laser interaction with carbon-nanotube 
      composite bipolar plate for PEMFCs.
PG  - 2048
LID - 10.1038/s41598-023-28700-2 [doi]
LID - 2048
AB  - A laser processing technique is proposed for the processing of a 2.5 mm thick 
      carbon nanotube (CNT) composite bipolar plate for proton exchange membrane fuel 
      cells (PEMFCs). This study aims to understand laser interaction with the CNT 
      composite plate experimentally using a pulsed nanosecond laser. Penetration 
      depth, top width, spatter width, and overall physical morphologies are studied. 
      Scanning electron microscope (SEM) and 3D Scanning Confocal Microscope were used 
      for observation and measurements. Based on that, a parametric investigation is 
      conducted and reported systematically. Most importantly, the pulse repetition 
      rate presents a unique nature of interaction that resulted in a critical 
      repetition rate distinguishing three operational regimes. The physical and 
      chemical properties of the regimes are further analyzed by Vickers microhardness 
      testing and energy dispersive X-ray (EDX) analyses performed on the surface and 
      cross-section of each specimen. The results reveal that the pulse repetition rate 
      introduces changes in mechanical properties and chemical compositions in the 
      vicinity of the processed region. In conclusion, lower pulse repetition should be 
      favored for less impact on mechanical properties, chemical composition, and 
      morphological aspects.
CI  - (c) 2023. The Author(s).
FAU - Musse, Dawit
AU  - Musse D
AD  - Department of Future Convergence Engineering, Cheonan College of Engineering, 
      Kongju National University, Cheonan, 31080, South Korea.
FAU - Lee, Dongkyoung
AU  - Lee D
AD  - Department of Future Convergence Engineering, Cheonan College of Engineering, 
      Kongju National University, Cheonan, 31080, South Korea. ldkkinka@kongju.ac.kr.
AD  - Department of Mechanical and Automotive Engineering, Cheonan College of 
      Engineering, Kongju National University, Cheonan, 31080, South Korea. 
      ldkkinka@kongju.ac.kr.
AD  - Center for Advanced Powder Materials and Parts of Powder (CAMP2), Cheonan College 
      of Engineering, Kongju National University, Cheonan, 31080, South Korea. 
      ldkkinka@kongju.ac.kr.
LA  - eng
PT  - Journal Article
DEP - 20230204
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
SB  - IM
PMC - PMC9899249
COIS- The authors declare no competing interests.
EDAT- 2023/02/05 06:00
MHDA- 2023/02/05 06:01
PMCR- 2023/02/04
CRDT- 2023/02/04 23:48
PHST- 2022/11/04 00:00 [received]
PHST- 2023/01/23 00:00 [accepted]
PHST- 2023/02/05 06:00 [pubmed]
PHST- 2023/02/05 06:01 [medline]
PHST- 2023/02/04 23:48 [entrez]
PHST- 2023/02/04 00:00 [pmc-release]
AID - 10.1038/s41598-023-28700-2 [pii]
AID - 28700 [pii]
AID - 10.1038/s41598-023-28700-2 [doi]
PST - epublish
SO  - Sci Rep. 2023 Feb 4;13(1):2048. doi: 10.1038/s41598-023-28700-2.