Wear Behaviour of HA-TiO2 Coatings Fabricated by Plasma Spray

Year 2019, Volume: 12 Issue: 3, 1392 - 1401, 31.12.2019

Muhammet Karabaş Yusuf Kayalı

https://doi.org/10.18185/erzifbed.530698

Abstract

Hydroxyapatite (HA) bioceramic coatings are
widely used in medical implants in order to improve biocompatibility and
corrosion resistance. But, HA coatings suffers from poor mechanical properties
in agressive environment. In this study, Single layer HA, TiO₂ and
double layer HA/TiO₂ coatings were fabricated by plasma spray. Wear
behavior of coatings in dry and SBF environment was investigated. As a result,
the single layer HA coating had the weakest wear resistance. However, abrasion
resistance improved as a result of the double layer coating design with TiO₂.
In the case of single-layer TiO₂ coating, the least material loss
occurred as a result of the wear tests.

Keywords

Hydroxyapatite, Plasma Spray

Plazma Püskürtme Kaplama Yöntemiyle Üretilmiş HA ve TiO2 Kaplamaların Aşınma Davranışlarının İncelenmesi

Abstract

Hidroksiapatit (HA) biyoseramik kaplamalar medikal implant
uygulamalarında biyouyumluluğu ve korozyon direncini arttırmak amacıyla yaygın
olarak kullanılmaktadır. Fakat HA kaplamalar zayıf mekanik özellikleri
sebebiyle saldırgan ortamlarda kolayca hasar alabilmektedir. Bu çalışmada tek
katman HA, TiO₂ ve çift katman HA/TiO₂ kaplamalar plazma
püskürtme yöntemi ile üretilmiştir. Kaplamaların kuru ortamda ve SBF ortamında
aşınma davranışları incelenmiştir. Elde edilen sonuçlar neticesinde tek katman
HA kaplamanın en zayıf aşınma direncine sahip olduğu belirlenmiştir. Fakat TiO₂
ile çift katman kaplama dizaynı sonucunda aşınma dayanımında iyileşmeler
meydana gelmiştir. Tek katman TiO₂ kaplamada ise aşınma deneyleri
sonucunda en az malzeme kaybı meydana geldiği anlaşılmıştır. 

Keywords

Hidroksiapatit, Plazma püskürtme, Aşınma

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