پديد آورنده :
حسيني، مهدي
عنوان :
بررسي و مقايسه خواص پوشش هاي مولايتي ايجاد شده به روش پلاسما اسپري تهيه شده از مخلوط پودر آلومينا و سيليكا و پودر مولايت
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي مواد
صفحه شمار :
يازده،76ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
حميدرضا سليمي جزي
استاد مشاور :
علي شفيعي، حامد صمدي
توصيفگر ها :
پاشش پلاسمايي , ميكروساختار , كريستاليزاسيون
تاريخ نمايه سازي :
29/5/90
استاد داور :
حسين ادريس، فتح ا... كريم زاده
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Study and comparison of plasma sprayed mullite coatings properties using mullite and a mixture of alumina and silica powders Mahdi Hosseini Mahdi hosseini83@yahoo com 2011 04 11 Department of Material Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language PersianSupervisor s name Hamid Reza Salimi JaziAbstractPlasma sprayed ceramic coatings are widely used for thermal barrier coating applications Commercially availablemullite powder particles and a mixture of mechanically alloyed alumina and silica powder particles were used todeposit mullite ceramic coatings by plasma spraying The coatings were deposited at three different substratetemperatures 25 C 300 C and 600 C on stainless steel substrates Microstructure and morphology of both powderparticles as well as coatings were investigated by using scanning electron microscopy SEM Phase formation anddegree of crystallization of coatings were analyzed and estimated by using X ray diffraction technique Differentialthermal analysis DTA method was used to study the phase transformation of coatings Results indicated that theporosity level in the coatings deposited using mullite as initial powder particles were lower than that deposited usingthe mixed powder particles at the same substrate temperatures In general coatings porosity level decreased withincreasing substrate temperatures The crystallization degree of the coatings deposited using the mixed powderparticles are higher than that deposited using mullite powder particles at substrate temperatures 25 C and 300 C At600 C the crystallization degree of the coatings deposited using the mixed powder particles is less DTA curves ofcoatings deposited using the mixed powders have showed some phase transformation due to the crystallization ofthe retained amorphous phases such as mullite alumina and silica in the coatings The degree of crystallization ofboth as sprayed coatings were significantly increased after post deposition heat treatments Results showed that themechanically alloyed mixed powder can be used as initial powder particles for deposition of mullite coatings withlower amorphous degree by setting substrate temperature close 300 C Keywords Plasma Spray Mullite Alumina Silica Crystallization Microstructure
استاد راهنما :
حميدرضا سليمي جزي
استاد مشاور :
علي شفيعي، حامد صمدي
استاد داور :
حسين ادريس، فتح ا... كريم زاده
