Correlation between structural and mechanical properties of RF magnetron sputter deposited hydroxyapatite coating

A. A. Ivanova, M. A. Surmeneva, A. I. Tyurin, R. A. Surmenev

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

In the present study hydroxyapatite (HA) thin films with a,b-plain and c-plain preferential orientation were prepared by means of RF-magnetron sputtering with water vapor addition into a working gas atmosphere to investigate the influence of microstructural features on mechanical performance of the coating at nanoscale. The mechanical properties of the HA coatings textured along a,b- and c-axes by nanoindentation conclusively highlight that elastic modulus, H/E ratio, H3/E2 parameter and percent of elastic recovery are determined by preferential orientation of the film. Nanoindentation reveals that the HA films exhibiting (300) texture possess commensurate nanohardness and lower elastic modulus compared to (002) oriented films, indicating that the former films possess higher resistance to cracking. The (002) and (300) textured coatings exhibited a nanohardness of 4.7 ± 2.0 GPa and 4.4 ± 2.2 GPa, respectively. The elastic modulus of the HA film with (300) and (002) preferential orientation was 75 ± 40 GPa and 103 ± 40 GPa, respectively. The HA coating with (300) texture showed a higher percentage of elastic recovery of 92% within unloading than that of the (002) textured film (69%).

Original languageEnglish
Pages (from-to)261-269
Number of pages9
JournalMaterials Characterization
Volume142
DOIs
Publication statusPublished - 1 Aug 2018

Keywords

  • Hydroxyapatite
  • Microstructure
  • Nanoindentation
  • RF-magnetron sputtering
  • Texture
  • Thin films

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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