TY - JOUR
T1 - Surface durability during high-speed spray impingement onto heat-exchanger materials and modified surfaces
AU - Benther, Jorge Duarte
AU - Gunasekera, Sanjiv
AU - Lappas, Petros
AU - Rosengarten, Gary
N1 - Funding Information:
We appreciate the scholarship support by the Australian Technology Network (ATN). Our sincere thanks to all the staff at RMIT Micro Nano Research Facility (MNRF), RMIT Microscopy and Microanalysis Facility (RMMF) and RMIT Advanced Manufacturing Precinct (AMP). Also, a big thank you to PhD candidate Alireza Heidarian from RMIT Laboratory for Innovative Fluid Thermal Systems (LIFTS) for helping with the SEM images.
Funding Information:
We appreciate the scholarship support by the Australian Technology Network (ATN). Our sincere thanks to all the staff at RMIT Micro Nano Research Facility (MNRF), RMIT Microscopy and Microanalysis Facility (RMMF) and RMIT Advanced Manufacturing Precinct (AMP). Also, a big thank you to PhD candidate Alireza Heidarian from RMIT Laboratory for Innovative Fluid Thermal Systems (LIFTS) for helping with the SEM images. This research did not receive any specific grant from funding agencies in the public, commercial, or not-or-profit sectors.
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/3
Y1 - 2023/3
N2 - Surface durability was investigated for materials used in electronics and heat exchangers during water spray impingement at ambient conditions. Smooth, rough, and modified copper and aluminium samples were tested with surface hardness, roughness and contact angle ranging from 52–100 HV, 0.53–79.28 μm and 48-153°, respectively. Although material loss and hardness alterations were insignificant after the high-speed droplet collisions, changes in surface morphology were observed. Both smooth and rough surfaces were resistant to 36-hour sprays with droplet velocities from 11–22 m s−1. However, sprays did cause changes in surface roughness and static contact angle, and the water repellent coatings were damaged, losing their low wettability.
AB - Surface durability was investigated for materials used in electronics and heat exchangers during water spray impingement at ambient conditions. Smooth, rough, and modified copper and aluminium samples were tested with surface hardness, roughness and contact angle ranging from 52–100 HV, 0.53–79.28 μm and 48-153°, respectively. Although material loss and hardness alterations were insignificant after the high-speed droplet collisions, changes in surface morphology were observed. Both smooth and rough surfaces were resistant to 36-hour sprays with droplet velocities from 11–22 m s−1. However, sprays did cause changes in surface roughness and static contact angle, and the water repellent coatings were damaged, losing their low wettability.
KW - Droplet impingement
KW - Durability
KW - Erosion
KW - Surface
UR - http://www.scopus.com/inward/record.url?scp=85150344689&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2023.108297
DO - 10.1016/j.triboint.2023.108297
M3 - Article
AN - SCOPUS:85150344689
SN - 0301-679X
VL - 181
JO - Tribology International
JF - Tribology International
M1 - 108297
ER -