Effect of nano diamond addition on mechanical and corrosion properties of Mg-3Sn-2Y alloy

Abstract

Magnesium is an important candidate for biodegradable implant applications due to its biocompatibility. Magnesium alloys degrade very rapidly in the body as a result of corrosion reactions. This degrades the mechanical properties of the alloy and causes the implant to deform. For this reason, researchers have been intensively supplementing magnesium alloys with Nanoparticles for the past few years and trying to improve their mechanical properties. Because it is known that nano-sized materials have superior properties compared to micro-sized materials. In this study, using Mg-3Sn-2Y alloy as matrix and with the addition of 1 wt.% nano diamond, nanocomposites were produced by gravity casting method. Tensile and macro hardness tests were performed on the alloy and nano composite samples and these results were supported by optical microscope (OM), field scanning electron microscopy (FE-SEM) and EDS analysis. It was observed that the hardness and tensile strength of the alloy increased with the addition of nano diamond. Corrosion tests were also carried out and Tafel curves were obtained. As a result of the corrosion tests, it was observed that the addition of nano diamonds improved the corrosion resistance of the alloy.

Keywords

• Mg-Sn alloy
• Nano diamond
• Mechanical properties
• Corrosion properties
• Biodegradable material

Nano elmas ilaveli Mg-3Sn-2Y alaşımının mekanik ve korozyon özelliklerinin incelenmesi

Abstract

Magnezyum biyo uyumluluğundan dolayı biyobozunur implant uygulamaları için önemli bir adaydır. Magnezyum alaşımları korozyon reaksiyonları sonucunda çok hızlıca vücut içerisinde bozunur. Bu durum alaşımın mekanik özelliklerini düşürür ve implantın deforme olmasına neden olur. Bu nedenle araştırmacılar geçtiğimiz bir kaç yıldır magnezyum alaşımlarına yoğun bir şekilde nanopartikül takviyesi yapmakta ve mekanik özellikleri iyileştirilmeye çalışılmaktadır. Çünkü nano boyuttaki malzemelerin mikro boyut ile karşılaştırıldığında daha üstün özelliklere sahip olduğu bilinmektedir. Bu çalışmada, Mg-3Sn-2Y alaşımı matriks olarak kullanılarak ve ağırlıkça %1 nano elmas ilavesi ile nanokompozit üretimi gravity döküm yöntemiyle gerçekleştirilmiştir. Üretilen alaşım ve nanokompozit numunelere çekme ve makro sertlik deneyleri gerçekleştirilmiş ve bu sonuçlar optik mikroskop (OM), alan taramalı elektron mikroskobu (FE-SEM) ve EDS analizleri ile desteklenmiştir. Alaşımın sertlik ve çekme mukavemetinin nano elmas ilavesi ile arttığı gözlenmiştir. Ayrıca korozyon testleri gerçekleştirilmiş ve Tafel eğrileri elde edilmiştir. Korozyon testleri sonucunda nano elmas ilavesinin alaşımın korozyon direncini iyileştirdiği görülmüştür.

Keywords

• Mg-Sn alaşımı
• nano elmas
• Mekanik özellikler
• Korozyon özellikleri
• Biyobozunur.

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