Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures
The present study estimated the cracking phenomenon in as-plasma-sprayed hydroxylapatite coatings (HACs) after they were being subjected to the severe cutting conditions in the direction perpendicular to the coating/substrate interface. In order to evaluate the effects of substrate preheating on the...
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| Format: | Article |
| Language: | English |
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Association of Chemical Engineers of Serbia
2017-01-01
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| Series: | Hemijska Industrija |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0367-598X/2017/0367-598X1600034G.pdf |
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| author | Gligorijević Bojan R. Vilotijević Miroljub N. Šćepanović Maja J. Radovanović Radovan V. Radović Nenad A. |
| author_facet | Gligorijević Bojan R. Vilotijević Miroljub N. Šćepanović Maja J. Radovanović Radovan V. Radović Nenad A. |
| author_sort | Gligorijević Bojan R. |
| collection | DOAJ |
| description | The present study estimated the cracking phenomenon in as-plasma-sprayed hydroxylapatite coatings (HACs) after they were being subjected to the severe cutting conditions in the direction perpendicular to the coating/substrate interface. In order to evaluate the effects of substrate preheating on the occurrence of micro-cracks, the HACs were deposited at different initial substrate temperatures (TS = 20, 100 and 200°C). The changes in phase composition and HA splat morphology with TS were observed and were correlated with the cracking occurrence. The results showed that severe cutting conditions introduced a localized cracking in the regions of HACs dominantly attributed to the brittle hydroxyl-deficient amorphous calcium phosphate (ACP) phase. This effect was particularly observable in the HACs deposited without preheating of substrate. On the other hand, the preheating of substrate reduced the presence of micro-cracks and caused insignificant changes in the average local phase composition. In HACs deposited with preheating of substrate, the HA splats (of which HACs are composed) were thinner and recrystallized HA regions seemed smaller in size and more evenly distributed. These results implied potentially important roles of the HA splat formation mechanism on the distribution of ACP and recrystallized HA regions in the as-plasma-sprayed HACs and the cracking resistance of HACs. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. TR 34022] |
| first_indexed | 2024-12-19T01:39:25Z |
| format | Article |
| id | doaj.art-a4b55653a797405294cb3e0524ff33ff |
| institution | Directory Open Access Journal |
| issn | 0367-598X 2217-7426 |
| language | English |
| last_indexed | 2024-12-19T01:39:25Z |
| publishDate | 2017-01-01 |
| publisher | Association of Chemical Engineers of Serbia |
| record_format | Article |
| series | Hemijska Industrija |
| spelling | doaj.art-a4b55653a797405294cb3e0524ff33ff2022-12-21T20:41:49ZengAssociation of Chemical Engineers of SerbiaHemijska Industrija0367-598X2217-74262017-01-0171324124910.2298/HEMIND160513034G0367-598X1600034GCracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperaturesGligorijević Bojan R.0Vilotijević Miroljub N.1Šćepanović Maja J.2Radovanović Radovan V.3Radović Nenad A.4Faculty of Technology and Metallurgy, Innovation Center, BelgradeVinča Institute of Nuclear Sciences, Belgrade + Plasma Jet Co, BelgradeCenter for Solid State Physics and New Materials, Institute of Physics, ZemunAcademy of Criminalistic and Police Studies, BelgradeFaculty of Technology and Metallurgy, Department of Metallurgical Engineering, BelgradeThe present study estimated the cracking phenomenon in as-plasma-sprayed hydroxylapatite coatings (HACs) after they were being subjected to the severe cutting conditions in the direction perpendicular to the coating/substrate interface. In order to evaluate the effects of substrate preheating on the occurrence of micro-cracks, the HACs were deposited at different initial substrate temperatures (TS = 20, 100 and 200°C). The changes in phase composition and HA splat morphology with TS were observed and were correlated with the cracking occurrence. The results showed that severe cutting conditions introduced a localized cracking in the regions of HACs dominantly attributed to the brittle hydroxyl-deficient amorphous calcium phosphate (ACP) phase. This effect was particularly observable in the HACs deposited without preheating of substrate. On the other hand, the preheating of substrate reduced the presence of micro-cracks and caused insignificant changes in the average local phase composition. In HACs deposited with preheating of substrate, the HA splats (of which HACs are composed) were thinner and recrystallized HA regions seemed smaller in size and more evenly distributed. These results implied potentially important roles of the HA splat formation mechanism on the distribution of ACP and recrystallized HA regions in the as-plasma-sprayed HACs and the cracking resistance of HACs. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. TR 34022]http://www.doiserbia.nb.rs/img/doi/0367-598X/2017/0367-598X1600034G.pdfplasma sprayinghydroxyapatite coatingsstresscrackingsubstrate preheating |
| spellingShingle | Gligorijević Bojan R. Vilotijević Miroljub N. Šćepanović Maja J. Radovanović Radovan V. Radović Nenad A. Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures Hemijska Industrija plasma spraying hydroxyapatite coatings stress cracking substrate preheating |
| title | Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures |
| title_full | Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures |
| title_fullStr | Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures |
| title_full_unstemmed | Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures |
| title_short | Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures |
| title_sort | cracking caused by cutting of plasma sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures |
| topic | plasma spraying hydroxyapatite coatings stress cracking substrate preheating |
| url | http://www.doiserbia.nb.rs/img/doi/0367-598X/2017/0367-598X1600034G.pdf |
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