İnsan Vücudunda Biyo-malzeme Olarak Kullanılan Titanyum-Zirkonyum Alaşımlarının 30° Alt Çene Hareketli Çiğneme Test Deneylerinde Aşınma Davranışlarının İncelenmesi

Öz

Bu çalışmanın amacı insan vücudunda biyomalzeme olarak tercih edilen saf titanyum (cp-Ti), Ti-5Zr ve Ti-10Zr alaşımlarının laboratuvar ortamında 30° alt çene haraketli çiğneme test deneylerinde aşınma davranışlarının incelenmesidir. Aşınma testi öncesinde test numunelerinin yüzey sertlik değerleri belirlenmiştir. Daha sonra test numuneleri bilgisayar kontrollü çiğneme test cihazı kullanılarak 120 000 aşınma döngü (70 N aşınma kuvveti, 30° açı ile 0,7 mm alt çene hareketi, 1,8 Hz aşınma frekansı 3000 termal döngü ve 6 mm çapında seramik aşındırıcı malzeme) test deneylerine maruz bırakılmıştır. Test numunelerini mikro yapı analizleri taramalı elektron mikroskobu (SEM) kullanılarak yapılmıştır. Ayrıca, aşınma testi prosedürü sonrasında test numunelerinin aşınma bölgesinde meydana gelene hacim kayıpları 3 boyutlu profilometre kullanılarak ölçülmüştür. Bu çalışma sonucunda elde edilen veriler ile titanyum içerisinde zirkonyum elementinin oranın artması ile alaşımın sertlik değerinin arttığı gözlemlenmiştir. Ayrıca zirkonyum elementinin alaşımın aşınma direncini artırdığı gözlemlenmiştir.

Anahtar Kelimeler

• Biyo-malzeme
• Titanyum
• Aşınma
• Hacim kaybı

Investigation of Wear Behavior of Titanium-Zirconium Alloys Used as Biomaterials in Human Body in 30° Lower Jaw Motion Chewing Simulation Test Experiment

Öz

The aim of this study is to investigate the wear behavior of pure titanium (cp-Ti), Ti-5Zr and Ti-10Zr alloys which are preferred as biomaterials in human body in 30° lower jaw movement chewing test experiments. The surface hardness values of the test specimens were determined before the wear test. Then, the test specimens were subjected to 120 000 wear cycles (70 N wear force, 0.7 mm lower jaw movement, 1.8 Hz wear frequency 3000 thermal cycles and 6 mm diameter ceramic abrasive antagonist material) using a computer-controlled chewing simulation device. Microstructure analyzes of the test samples were performed with scanning electron microscopy (SEM). In addition, wear volume loss of test specimen abrasion area obtained using non-contact 3D profilometer. As a result of this study, it was observed that the hardness value of the alloy increased with increasing ratio of zirconium element in titanium. It has also been observed that the alloy of the element zirconium increases the wear resistance.

Anahtar Kelimeler

• Bio-materials
• Titanium
• Wear
• Volume Loss

Kaynakça

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