پديد آورنده :
اله نوري، اميرحسين
عنوان :
فرآوري هيدروكسي آپاتيت به روش ساخت افزودني تف جوشي ليزري غير مستقيم
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
چهارده، ۱۰۹ص.: مصور، جدول، نمودار
استاد راهنما :
محسن بدرسماي
استاد مشاور :
احسان فروزمهر
توصيفگر ها :
استخوان , ساخت افزودني , تف جوشي , گزينشي ليزري , هيدروكسي آپاتيت , پليمر
استاد داور :
مهدي كاروان، علي مالكي
تاريخ ورود اطلاعات :
1397/08/05
چكيده انگليسي :
Indirect Selective Laser Sintering of Hydroxyapatite Powders Amirhosein Alahnoori a alahnoori@me iut ac ir June 24 2018 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree Master of Science MSc Language FarsiSupervisor Mohsen badrossamay Assist Prof Mohsen badrossamay@cc iut ac ir AbstractBone is one of the most vulnerable tissues in the human body damage to bone may lead to its destruction orreplacing by the human body There are various ways to help bone healing or replacement with new tissues withlimitations such as the need for an environment with geometry and proper structure In recent years additivemanufacturing AM the part fabrication begins with CAD file of parts and complex geometris can be directlycreated in layer manner has been proven to generate a new eara in manufacturing Among AM processes selective laser sintering SLS is a powder bed fusion AM method that are widely used in medical sector forproduction of guides scaffolds implant and so on The focus of this study is on indirect SLS of porous bioactivepart using hydroxyapatite HA and polyamide 12 PA12 In order to manufacture the parts with indirect SLS the combination of HA size 63 90 micron with the PA12 size 63 micron has been used as a binding agent The product of this stage is a green part that by carrying out heat treatment on it the binder is removed fromstructure brown part is created In this research HA was produced by natural method natural hydroxyapatite characterized by FTIR EDX and XRD By mechanical methods HA became powder in a different dimensionalrange and in next step by different methods mixed with PA12 Porous part were fabricated using SLS thensintered in a furnace After HA parts were fabricated all specimens were measured in dimensions and weightbefore and after the sintering In order to evaluate the effect of adding different materials on sintering Stainlesssteel and silica with 5 vol and average size 40 micron were used Analyzes include spectroscopic analysis X ray diffraction pattern dimensional measurement porosity and part density images Microscopy of the surfaceof the samples and mechanical testing It was found that while SLS fabricated of HA PA12 parts had a relativedensity of 30 the porosity of sintered samples was reduced to 55 The parts made of HA silica were sinteredin 1200 C had a relative density of 85 compressive strength 10 MPa and Weibull modulus 6 3 The partsmade of HA stainless steel were sintered in 1140 C had a relative density of 80 compressive strength 20MPaand Weibull modulus 6 16 KeywordsBone Additive Manufacturing Selective Laser Sintering Hydroxyapatite Polymer
استاد راهنما :
محسن بدرسماي
استاد مشاور :
احسان فروزمهر
استاد داور :
مهدي كاروان، علي مالكي
