محبوبه ازادی
دانشگاه سمنان
[ 1 ] - بررسی تأثیر دمای عملیات حرارتی انحلال بر سختی و ریزساختار سوپرآلیاژ اینکونل 713
آلیاژ اینکونل 713 برای پره‌های توربوشارژر خودروها مورد استفاده قرار می‌گیرد. در این مقاله با تغییر عملیات حرارتی انحلال جزئی و ناقص در محدوده دمای 1000 تا 1200 درجه سانتی‌گراد در زمان ثابت یک ساعت، تغییرات ریزساختاری آلیاژ و ارتباط آن با سختی بررسی شده است. نتایج بیانگر این مطلب بوده که تغییرات فازی در فاصله 100 درجه سانتی‌گراد چشمگیر بوده و انجام عملیات حرارتی موجب انحلال کاربید کروم و کاربید ...
[ 2 ] - EIS study of epoxy paints in two different corrosive environments with a new filler: rice husk ash
In this paper, the corrosion behavior of the filled epoxy paint with the rice husk ash RHA on steel substrates in two different corrosive environments natural sea water and 2M sulfuric acid has been studied. Electrochemical impedance spectroscopy EIS was used to evaluate protective properties of different organic coating systems due to the different filler composition. RHA was prepared by heati...
[ 3 ] - Investigation of the Heat Treatment Effect on Microstructures and Phases of Inconel 713C Superalloy
The application of Inconel 713C is very vast in different industries such as in automobiles, aircrafts, boilers and turbines. In this paper, Inconel 713C specimens were solutionized at 1000 and 1200 °C for 1 hours in order to study changes in phases and the structure of alloy to modify the γ' phase. The optical and the scanning electron microscopy were used to investigate the structure and the ...
[ 4 ] - A Review on Titanium Nitride and Titanium Carbide Single and Multilayer Coatings Deposited by Plasma Assisted Chemical Vapor Deposition
In this paper, we reviewed researches about the titanium nitride (TiN) and titanium carbide (TiC) single and multilayer coatings. These coatings were deposited by the plasma assisted chemical vapor deposition (PACVD) technique. Plasma-based technologies are used for the processing of thin films and coatings for different applications such as automobile and aerospace parts, computer disc drives,...
[ 5 ] - Effect of Temperature and Gas Flux on the Mechanical Behavior of TiC Coating by Pulsed DC Plasma Enhanced Chemical Vapor Deposition(TECHNICAL NOTE)
There are many factors such as voltages, duty cycle, pressure, temperatures and gas flux in coatings process that were effective in changing coatings characteristic. In this paper in plasma enhanced chemical vapor deposition (PECVD) technique, temperature and gas flux are two important variants that affecting the coatings structure and mechanical properties. All TiC coating deposited on a hot...
[ 6 ] - Electrochemical Characterizations of Epoxy Coatings Embedded by Modified Calcium Carbonate Particles
In this paper, electrochemical behavior of epoxy paints embedded by modified calcium carbonate particles was investigated during exposure to 3.5 wt% NaCl solution. The precipitated calcium carbonate (PCC) and ground calcium carbonate (GCC) particles were utilized as inexpensive filler for epoxy paints. Electrochemical impedance spectroscopy (EIS), polarization tests and pin-on-disk method w...
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