8638

8019

كارشناسي ارشد

مواد

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1392

چهارده،94ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مهدي احمديان، محمود مرآتيان

محمدحسين فتحي

21/12/92

احمد منشي، رحمت اله عمادي

مهندسي مواد

ID8019

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Isfahan University of Technology Department of Materials Engineering Fabrication and Characterization of Nanostructured Bulk Alumina Magnesium Fluorapatite Biocomposite Maryam Sadat Hejazi Maryamhejazi65@yahoo com Submitted on December 29 2013 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M SC Language Farsi Supervisors Mehdi Ahmadian Assist Prof ahmadian@cc iut ac ir Mahmood Meratian Assoc Prof meratian@cc iut ac ir Abstract Magnesium fluorapatite MFA with different amounts of alumina 0 10 25 and 50wt were milled in order to obtain biphasic composites The effect of alumina addition associate with applied two step sintering TSS method on mechanical properties and densification was investigated Taguchi method was used to design of experiments and the results were evaluated with the analysis of variance ANOVA Variable parameters include initial temperature and the temperature and the time of secondary stage X ray diffraction was used to phase study during sintering Scanning electron microscopy SEM was used to estimate particle size and structural changes in MFA alumina composites To evaluate the bioactivity of bulked samples in Fourier transform infrared spectrometer FTIR Inductively coupled plasma ICP spectrometry scanning electron microscopy SEM and X ray diffraction XRD were applied Result showed that fracture toughness and hardness of composites increased linearly by addition alumina The fracture toughness and hardness of MFA A12O3 composites is reached maximum values of 5 82 1 05MPa m and 22 09 3 5 GPa for MFA 50 alumina composite respectively In all of the composites MFA decomposed to tricalcium phosphate TCP via used TSS Moreover at 1300oC composite is completely decomposed and MFA peaks were disappeared The formation of apatite layer is occurred on the surface of all composites In MFA 10 alumina composite the accelerate growth of apatite during immersion in SBF was observed In purity MFA the growth of apatite was occurred from 7 to 28 days immersion in SBF continuously Keywords Mg fluorapatite Composite Alumina Two step sintering Mechanical behavior Bioactivity Taguchi Method

مهدي احمديان، محمود مرآتيان

محمدحسين فتحي

احمد منشي، رحمت اله عمادي