عنوان البحث(Papers / Research Title)
STUDYING THE PROPERTIES OF COCRMO (F75) DOPED Y USING (P-M)
الناشر \ المحرر \ الكاتب (Author / Editor / Publisher)
حيدر حسن جابر جمال الدين
Citation Information
حيدر,حسن,جابر,جمال,الدين ,STUDYING THE PROPERTIES OF COCRMO (F75) DOPED Y USING (P-M) , Time 09/12/2016 06:01:39 : كلية هندسة المواد
وصف الابستركت (Abstract)
Cobalt alloys are one of the main groups of metallic materials used as implants. They are numbered among
الوصف الكامل (Full Abstract)
INTRODUCTION Implants are fabricated from a wide variety of materials, including metals, polymers, ceramics and their composites. Among these materials, metals are an important group [1]. Cobalt chrome alloys are used widely for medical prosthesis such as hip and knee replacements, dental devices and support structures for heart valves because they have a great biocompatibility and spontaneous chromites formation of a passive layer which provides the material high corrosion resistance [2]. They are used where high stiffness, or highly polished, and extremely wear resistant material is required. Wear resistance, mechanical properties, biocompatibility and corrosion resistance may be influenced by the microstructure which depends on the thermal treatment applied to the material [3]. Yttrium was first discovered by Johan Gadolin. The physical appearance is a bright silvery surface like other metals and it s also prepared as a dark gray to black powder with a bit of shine. Like any other rare earth metals yttrium has many uses and the most common use iYttrium phosphors have long been used in color televisions sets and in computer monitors [4, 5]. No research has focused on Yttrium into CoCrMo matrix to improve the physical and chemical properties without affecting the alloy. This research highlights to improve the mechanical and electrochemical properties of CoCrMo alloy by addition different percentages of yttrium (C1 =0.5%Y, C2= 1%Y, C3= 1.5%Y & A= master alloy).s in phosphors. A phosphor is a material that shines when struck by electrons.
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