The Effect of PLA/HA Coating Thickness on Crack Formation and Corrosion Performance
Surface modification of metallic implants is often required to facilitate positive interaction between the implant and the surrounding hard tissue. In this study, a polymer-ceramic composite coating of polylactic acid/hydroxyapatite (PLA/HA) was successfully deposited on a Co–Cr–Mo alloy by the dip...
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| Main Authors: | , , , , |
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| Format: | Book Section |
| Language: | English |
| Published: |
Springer, Cham
2022
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/35952/1/18.The%20Effect%20of%20PLA%20HA%20Coating%20Thickness%20on%20Crack%20Formation%20and%20Corrosion%20Performance.pdf http://umpir.ump.edu.my/id/eprint/35952/ http://10.1007/978-3-030-92964-0_6 http://10.1007/978-3-030-92964-0_6 |
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| Summary: | Surface modification of metallic implants is often required to facilitate positive interaction between the implant and the surrounding hard tissue. In this study, a polymer-ceramic composite coating of polylactic acid/hydroxyapatite (PLA/HA) was successfully deposited on a Co–Cr–Mo alloy by the dip coating method in chloroform suspension at room temperature. The effect of various PLA/HA dipping layers was studied and the dip coating process parameters were optimized in order to obtain a homogeneous, crack free, densely packed and adhesive coating. It is found that PLA/HA-coated substrate with 3 dipping layers were denser and less crack sensitive compared to 6 dipping layers. Although it is hypothesized that a coarser coated surface helps to facilitate ingrowth of osseous tissue in human body, but current findings show opposite manners due to the fact that a higher corrosion rate was obtained. The coated substrate with 6 dipping layers also were found more profound to micro-cracks and delamination with a lower microhardness value compared to coated substrate with 3 dipping layers. |
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