The Effect of Particle Type and Size on CoCr Surface Properties by Fine-Particle Shot Peening
Issued Date
2023-05-01
Resource Type
eISSN
20763417
Scopus ID
2-s2.0-85159360873
Journal Title
Applied Sciences (Switzerland)
Volume
13
Issue
9
Rights Holder(s)
SCOPUS
Bibliographic Citation
Applied Sciences (Switzerland) Vol.13 No.9 (2023)
Suggested Citation
Jarungvittayakon C., Khantachawana A., Sa-ngasoongsong P. The Effect of Particle Type and Size on CoCr Surface Properties by Fine-Particle Shot Peening. Applied Sciences (Switzerland) Vol.13 No.9 (2023). doi:10.3390/app13095814 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/82828
Title
The Effect of Particle Type and Size on CoCr Surface Properties by Fine-Particle Shot Peening
Other Contributor(s)
Abstract
Cobalt–chromium (CoCr) alloy is widely used for medical implants such as for dental or joint replacements because of its strength and high corrosion resistance. By throwing a spherical media against a material surface, fine-particle shot peening can modify surface properties and, as a result, has been widely used as a low-cost and simple method to increase a metal’s wear resistance. However, no recent literature has reported the effect of particle type and size on the surface properties of CoCr alloys. This study examined two different particle types (ceramic (alumina–zirconia composites) and silica (SiO2)) and three different particle sizes to determine their effects on CoCr’s surface properties after fine-particle shot peening. The surface properties, including morphology, roughness, hardness, residual stress, and cytotoxicity, were tested to evaluate the effect of the process. The larger size and higher hardness of the particle (ceramic) changed the surface microstructure more than particles with smaller sizes and lower hardness (silica). The results of the cytotoxicity test showed that the fine-particle shot peening on the CoCr material did not affect cell viability, an important fact when considering its potential use as a surface material for medical implants. The results showed that fine-particle shot peening on CoCr material can improve several surface properties and that the larger ceramic particle offers the best results.