پديد آورنده :
هدايتي، مهدي
عنوان :
ساخت و مشخصه يابي تربيولوژيكي و ريز ساختاري پوشش هاي نانو كامپوزيتي پليمري پلي ﴿اتراتركتون﴾/ سيليكا بر سطح فولاد ساده كربني
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
يازده،121ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
مهدي صالحي، مسعود پنجه پور
استاد مشاور :
روح الله باقري
توصيفگر ها :
پاشش الكترواستاتيكي پودر , نانو ذرات سيليكا
تاريخ نمايه سازي :
24/7/89
استاد داور :
حميدرضا سليمي جزي، طيبه بهزاد
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Fabrication tribological and microstructural characterization of PEEK SiO2 polymer matrix nanocomposite coatings on the plain carbon steel substrate Mehdi Hedayati Email address m hedayati@ma iut ac ir Date of Submission 14th July 2010 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor s Name Mehdi Salehi Professor salehi@hotmail co uk Masoud Panjepour Assistant Professor panjepour@cc iut ac ir Abstract In this research work fabrication tribological and microstructural characterization of polyether ether ketone PEEK SiO2 polymer nanocomposite coatings were investigated In this order the amorphous and semi crystalline PEEK and PEEK 10 vol SiO2 coatings were deposited on the plain carbon steel st37 substrate by means of the electrostatic powder spray technique The nanocomposite powder was prepared by high energy ball milling Before milling to achieve a good dispersion and strong interface silica nanoparticles were surface modified using a silane coupling agent 3 glycidoxypropyltrimethoxysilane and characterized by means of furrier transformed infrared spectrophotometer FTIR transmission electron microscope TEM and Light transmittance LT measurement The morphological and particle size distribution changes crystalline structure and thermal behavior of the obtained nanocomposite during milling process were evaluated by scanning electron microscope SEM laser particle size analyzer LPSA X ray diffractometer XRD and differential scanning calorimeter DSC respectively The electrostatic spray parameters and processing time and temperature to obtain a uniform coating were determined The coatings were studied in the terms of surface and cross section quality crystalline structure dispersion and distribution of nanoparticles in the polymer matrix and molecular bond structure using the optical and scanning transmission electron microscopes OM and SEM TEM XRD and FTIR respectively The coatings hardness and their adhesion strength were evaluated by Vickers microhardness and pull off tests The tribological behaviors of the coatings were investigated using pin on disk test The results indicated that dispersion and distribution of the surface modified nanoparticles were more uniform and homogeneous in PEEK matrix than the unmodified ones The hardness of the semi crystalline pure PEEK coatings was higher than the amorphous one but their adhesion strength was lower However the hardness and adhesion strength of the nanocomposite coatings improved significantly than the pure PEEK coatings and also their sensitivity to the crystallinity of the coating decreased remarkably It was also found that the wear and frictional behavior of the semi crystalline coatings were better than the amorphous ones However the presence of the surface modified silica nanoparticles caused the improvement of wear rate but increase in the friction coefficient The wear mechanisms of each crystalline and amorphous PEEK and nanocomposite coatings were studied using the SEM observations of wear tracks Keywords Polymer matrix nanocomposite Tribology Coating Electrostatic powder spray Poly ether ether ketone Silica nanoparticles
استاد راهنما :
مهدي صالحي، مسعود پنجه پور
استاد مشاور :
روح الله باقري
استاد داور :
حميدرضا سليمي جزي، طيبه بهزاد
