Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures

Main Article Content

Bojan R. Gligorijević
Miroljub N. Vilotijević
Maja J. Šćepanović
Radovan V. Radovanović
Nenad A. Radović

Abstract

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.

Article Details

How to Cite
[1]
B. R. Gligorijević, M. N. Vilotijević, M. J. Šćepanović, R. V. Radovanović, and N. A. Radović, “Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures”, Hem Ind, vol. 71, no. 3, pp. 241–249, Jul. 2017, doi: 10.2298/HEMIND160513034G.
Section
-

How to Cite

[1]
B. R. Gligorijević, M. N. Vilotijević, M. J. Šćepanović, R. V. Radovanović, and N. A. Radović, “Cracking caused by cutting of plasma-sprayed hydroxyapatite coatings and its relation to the structural features of coatings deposited at different initial substrate temperatures”, Hem Ind, vol. 71, no. 3, pp. 241–249, Jul. 2017, doi: 10.2298/HEMIND160513034G.

References

Y.C. Yang, E. Chang, The bonding of plasma-sprayed hydroxyapatite coatings to titanium: effect of processing, porosity and residual stress, Thin Solid Films 444 (2003) 260–275.

M. Topić, T. Ntsoane, R.B. Heimann, Microstructural characterisation and stress determination in as-plasma sprayed and incubated bioconductive hydroxyapatite coatings, Surf. Coat. Technol. 201 (2006) 3633–3641.

Y.C. Yang, Influence of residual stress on bonding strength of the plasma-sprayed hydroxyapatite coating after the vacuum heat treatment, Surf. Coat. Technol. 201 (2007) 7187–7193.

M.F. Morks, A. Kobayashi, Influence of spray parameters on the microstructure and mechanical properties of gas--tunnel plasma sprayed hydroxyapatite coatings, Mater. Sci. Eng., B 139 (2007) 209–215.

C.-W. Yang, T.-M. Lee, T.-S. Lui, E. Chang, Effect of post vacuum heating on the microstructural feature and bonding strength of plasma-sprayed hydroxyapatite coatings, Mater. Sci. Eng., C 26 (2006) 1395–1400.

B.-Y. Chou, E. Chang, Influence of deposition temperature on mechanical properties of plasma-sprayed hydroxyapatite coating on titanium alloy with ZrO2 inter-mediate layer, J. Therm. Spray Technol. 12 (2009) 199–207.

M. Vilotijević, P. Marković, S. Zec, S. Marinković, V. Jokanović, Hydroxyapatite coatings prepared by a high power laminar plasma jet, J. Mater. Process. Tech. 211 (2011) 996–1004.

S. Saber-Samandari, K. Alamara, S. Saber-Samandari, Calcium phosphate coatings: morphology, microstructure and mechanical properties, Ceram. Int. 40 (2014) 563–572.

B.R. Gligorijević, M. Vilotijević, M. Šćepanović, N.S. Vuković, N.A. Radović, Substrate preheating and structural properties of power plasma sprayed hydroxyapatite coatings, Ceram. Int. 42 (2016) 411–420.

L. Sun, C.C. Berndt, C.P. Grey, Phase, structural and microstructural investigations of plasma sprayed hydroxyapatite coatings, Mater. Sci. Eng., A 360 (2003) 70–84.

R.A. Surmenev, A review of plasma-assisted methods for calcium phosphate-based coatings fabrication, Surf. Coat. Technol. 206 (2012) 2035–2056.

R.Z. LeGeros, Biodegradation and Bioresorption of Calcium Phosphate Ceramics, Clin. Mater. 14 (1993) 65–88.

S.W.K. Kweh, K.A. Khor, P. Cheang, Plasma-sprayed hydroxyapatite (HA) coatings with flame-spheroidized feedstock: microstructure and mechanical properties, Biomaterials 21 (2000) 1223–1234.

I. Demnati, M. Parco, D. Grossin, I. Fagoaga, C. Drouet, G. Barykin, C. Combes, I. Braceras, S. Goncalves, C. Rey, Hydroxyapatite coating on titanium by a low energy plasma spraying mini-gun, Surf. Coat. Technol. 206 (2012) 2346-353.

I. Demnati, M. Parco, D. Grossin, I. Fagoaga, C. Drouet, G. Barykin, C. Combes, I. Braceras, S. Goncalves, C. Rey, Plasma-sprayed apatite coatings: Review of physical–chemical characteristics and their biological consequences, J. Med. Biol. Eng. 34 (2014) 1–7.

K. Fox, P.A. Tran, N. Tran, Recent advances in research applications of nanophase hydroxyapatite, ChemPhysChem. 13 (2012) 2495–2506.

K.A. Gross, V. Gross, C.C. Berndt, Thermal processing of hydroxyapatite for coating production, J. Biomed. Mater. Res. 39 (1998) 580–587.

C. Hesse, M. Hengst, R. Kleeberg, J. Gotze, Influence of experimental parameters on spatial phase distribution in as-sprayed and incubated hydroxyapatite coatings, J. Mater. Sci.: Mater. Med. 19 (2008) 3235–3241.

R.A. Surmenev, A review of plasma-assisted methods for calcium phosphate-based coatings fabrication, Surf. Coat. Technol. 206 (2012) 2035–2056.

K.A. Gross, V. Gross, C.C. Berndt, Thermal Analysis of Amorphous Phases in Hydroxyapatite Coatings, J. Am. Ceram. Soc. 81 (1998) 106–112.

Similar Articles

You may also start an advanced similarity search for this article.