فرهاد شهریاری نوگورانی

[ 1 ] - اصلاح مورفولوژی سطحی پوشش‌ تنگستنی ایجاد شده به روش پاشش پلاسمایی اتمسفری به منظور کاربرد در لامپ تولید پرتو ایکس

پوششهای ضخیم تنگستن در ساخت آند لامپهای تولید پرتو ایکس مورد استفاده در تجهیزات تشخیص پزشکی کاربرد دارند. با توجه به اهمیت صافی سطح آند در کیفیت تصویر رادیولوژی حاصل، لازم است قطعه آند تا حد امکان زبری سطحی پایینی داشته باشد و بتواند این زبری پایین را در شرایط کاری دمای بالا حفظ نماید. به منظور بهبود کارآیی این لامپها مورفولوژی سطحی پوششهای تنگستنی اعمال شده به روش پاشش پلاسمایی اتمسفر...

[ 2 ] - مکانیزم تشکیل پوشش نفوذی تیتانیوم بر سوپرآلیاژ پایه نیکلی B-1900

Although titanium has been recognized for its excellent bio-compatibility with human tissues and good corrosion resistance in some specific environments, little attention has been paid to the surface enrichment of the components by titanium. In this paper, titanium diffusion coating was formed on the surface of Ni-based alloy B-1900 via pack cementation technique and the microstructure of the ...

[ 3 ] - Acetone sensing properties of hierarchical WO3 core-shell microspheres in comparison with commercial nanoparticles

In this work, hierarchical WO3 core-shell microspheres were synthesized via a facile template-free precipitation method. Gas sensing properties of the synthesized powder to acetone and some other volatile organic compounds were comparatively investigated with commercial WO3 nanoparticles. The synthesized and commercial powders were characterized by X-ray diffraction, scanning electron microscop...

[ 4 ] - Acetone sensing properties of hierarchical WO3 core-shell microspheres in comparison with commercial nanoparticles

In this work, hierarchical WO3 core-shell microspheres were synthesized via a facile template-free precipitation method. Gas sensing properties of the synthesized powder to acetone and some other volatile organic compounds were comparatively investigated with commercial WO3 nanoparticles. The synthesized and commercial powders were characterized by X-ray diffraction, scanning electron microscop...

[ 5 ] - Formation and Evaluation of Oxidation Behavior of Zirconia- Aluminide Coating on Nickel- Based Alloy

Practical applications of thermal barrier coatings with aluminide bond-coats are limited due to oxide scale spallation of the aluminide coating under applied thermal stresses. Considering the positive effects of oxygen-active elements or their oxides on the high temperature oxidation behavior, in this research zirconia was introduced into an aluminide coating. For this purpose, a Watts type bat...