Araştırma Makalesi
Yıl 2021,
, 1 - 14, 03.03.2021
Öz
Bu çalışmada farklı sinterleme sıcaklıkları (900-1300oC) ve farklı oranlardaki magnezyum oksit (MgO; ağırlıkça %0.5, %1 ve %2) ilavelerinin ticari saflıktaki bir hidroksiapatit (HA)’ in mikroyapısal, fiziksel ve mekanik özelliklerine etkileri incelendi. MgO ilavesiz HA’ in basma dayanımı ve kırılma tokluğu özelliklerinin üç ana nedenden dolayı (dekompoze olma, aşırı tane büyümesi ve mikro çatlak oluşumu) 1100oC' nin üzerindeki sıcaklıklarda azaldığı belirlendi. Tüm numunelerde ana faz olarak HA, eser faz olarak ise beta/alfa-trikalsiyum fosfat ve kalsiyum oksit (MgO ilavesiz HA’ te) ile whitlockite (MgO ilaveli HA’ te) tespit edildi. MgO ilavesi ile saf HA’ te meydana gelen tane büyümesinin engellendiği görüldü. Ağırlıkça %1 oranında MgO ilaveli HA’ te ait mikroyapıların, diğerlerine kıyasla daha homojen ve düzgün tanelerden oluştuğu tespit edildi. HA’ e ağırlıkça %0.5 ve %1 oranlarında MgO ilavesinin tüm sıcaklıklarda saf HA’ e ait özelliklerin artmasına katkı sağladığı belirlendi. Poroziteli yapısı nedeniyle, %2 MgO ilaveli HA tüm sinterleme sıcaklıklarında diğerlerinden daha düşük sinterlenebilirliğe ve özelliklere sahip olduğu belirlendi. %1 MgO ilaveli HA’ nin, saf HA’ e oranla %38 oranında daha fazla basma dayanımı (183.25±25.09 MPa) ve %53 oranında daha fazla kırılma tokluğuna (1.472±0.041 MPam1/2) sahip olduğu, ancak düşük kırılma tokluğu nedeniyle insan vücudunda kullanıma uygun olmadığı belirlendi.
Anahtar Kelimeler
Kaynakça
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Toplam 58 adet kaynakça vardır.
Ayrıntılar
| Birincil Dil | Türkçe |
|---|---|
| Konular | Mühendislik, Giyilebilir Malzemeler |
| Bölüm | Tekstil Mühendisliği |
| Yazarlar | |
| Yayımlanma Tarihi | 3 Mart 2021 |
| Gönderilme Tarihi | 27 Temmuz 2020 |
| Yayımlandığı Sayı | Yıl 2021 |