4871

4575

كارشناسي ارشد

ريخته گري

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1388

هشت،103ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محمد حسين فتحي،محمود مراتيان

احمد كرمانپور

30/9/88

احمد منشي،بهزاد نيرومند

1396/09/22

كتابنامه

مهندسي مواد

ID4575

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Investment Casting of Co Cr Mo Alloy and Coating of Bioceramic Simultaneously for Medical Applications Hossein Minouei h minouie@yahoo com 2009 4 20 Department of Materials Science and Technology Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiMohammadHossein Fathi fathi@cc iut ac ir Mahmood Meratian Meratian@cc iut ac ir Abstract Cobalt base alloys are widely used for dental and orthopedic implants due to their suitable mechanicalproperties corrosion resistance and appropriate biocompatibility These alloys are biologically inert and do not havethe ability to make bonding with tissue Implants coated with bioactive materials such as hydroxyapatite andbioglass show higher biological fixation in human body Several coating techniques have been emerged however coating and surface bioactivation during the fabrication process is more desirable economically while higher qualityand saving time Cobalt Chromium Molybdenum implants is generally fabricated by investment casting andusually followed by heat treatment The purpose of this study was surface bioactivation of ASTM F 75 alloythrough investment casting and solution treatment and investigation of coating properties For surface bioactivation molten metal poured in to molds which previously coated with hydroxyapatite via centrifugal casting The moldpreheating temperatures effect on coating properties were investigated Several mold preheating temperatures weretested and temperature distributions obtained by numerical modeling For surface bioactivation during solutiontreatment the casting was heat treated in mixture of hydroxyapatite bioglass media Bioactivity was evaluated invitro by specimens emersion in simulated body fluid Specimens were characterized by X ray diffraction analysis electron scanning microscopy energy dispersive spectroscopy and optical microscopy Results showed the bioactivelayer reached in calcium and phosphor on the surface of Cobalt chromium Molybdenum alloy substrates In vitroevaluating bioactivity results and bone like apatite formation on surface which indicator as bioactivity showed theimprovement in osteointigration of alloy when it used as a dental or orthopedic implant Key wordsInvestment Casting Cobalt Base Alloy Bioactive Ceramics Coating Surface Bioactivation Heat Treatment Numerical Modeling pdfMachine Is a pdf writer that produces quality PDF files with ease Produce quality PDF files in seconds and preserve the integrity of your original documents Compatible across nearly all Windows platforms if you can print from a windows application you can use pdfMachine Get yours now

محمد حسين فتحي،محمود مراتيان

احمد كرمانپور

احمد منشي،بهزاد نيرومند