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

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.

Anahtar Kelimeler:

Hidroksiapatit, Plazma püskürtme, Aşınma

Wear Behaviour of HA-TiO2 Coatings Fabricated by Plasma Spray

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,

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