IMAT 2016 , 2016-11-08

عنوان : ( Evaluation of mechanical properties of microstructured composite NiCrAlY/YSZ FGM coating produced by APS method on IN738-- ارزیابی خواص مکانیکی پوشش¬های گرادیانی و کامپوزیتی NiCrAlY/YSZ تولید شده به روش APS روی سوپرآلیاژ IN738LC )

نویسندگان: یگانه حسن زاده مقدم , سیدعبدالکریم سجادی , ابوالفضل باباخانی ,
فایل: Full Text

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چکیده

In this paper, the microstructure and mechanical properties of three types of thermal barrier coating including: three, five and seven-layers composite, made of NiCrAlY / YSZ with the gradual change of chemical composition (FGM) and a conventional two-layers thermal barrier coating on the IN738 superalloy waere studied and compared. then, Coating by plasma spraying process in air (AP) was performed. For all coating systems, final thickness were considered similar (500 μm). In addition to more detailed comparison of the coating, the other parameters of coating are kept constant, the only variable was the number of layers. The wear test, microhardness, bending strength, SEM and optical microscopy analysis was performed on these four types of samples. Hardness tests indicated that the hardness of ceramic and metal layers increased by increasing the number of coatng layers and 1/5 times have been hard. The bending tests results showed that by increasing the number of layers, the strength and ductility of coating systems were increased. As a result, we can express that by increasing the number of layers, not only the coatings become more strength, but also become more flexible. The results confirmed that the gradient coating under conditions of high temperature are more corrosion resistance and greatly increases the lifetime of superalloys.

کلمات کلیدی

, thermal barrier coating, NiCrAlY/YSZ, bending strength, ductility, microhardness,
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@inproceedings{paperid:1059881,
author = {حسن زاده مقدم, یگانه and سجادی, سیدعبدالکریم and باباخانی, ابوالفضل},
title = {Evaluation of mechanical properties of microstructured composite NiCrAlY/YSZ FGM coating produced by APS method on IN738-- ارزیابی خواص مکانیکی پوشش¬های گرادیانی و کامپوزیتی NiCrAlY/YSZ تولید شده به روش APS روی سوپرآلیاژ IN738LC},
booktitle = {IMAT 2016},
year = {2016},
location = {شیراز, ايران},
keywords = {thermal barrier coating; NiCrAlY/YSZ; bending strength; ductility; microhardness; FGM.},
}

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%0 Conference Proceedings
%T Evaluation of mechanical properties of microstructured composite NiCrAlY/YSZ FGM coating produced by APS method on IN738-- ارزیابی خواص مکانیکی پوشش¬های گرادیانی و کامپوزیتی NiCrAlY/YSZ تولید شده به روش APS روی سوپرآلیاژ IN738LC
%A حسن زاده مقدم, یگانه
%A سجادی, سیدعبدالکریم
%A باباخانی, ابوالفضل
%J IMAT 2016
%D 2016

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