Study of mechanical properties and wear resistance of HVOF CoNiCrAlY/YSZ coatings
Author(s):
Abstract:
In this study effect off adding oxide reinforcement YSZ on mechanical properties and wear resistance of CoNiCrAlY/YSZ coating has been investigated. First, for preparing composite powders CoNiCrAlY with 5, 10 and 15% YSZ were mechanical milled 24 hours. The composite coatings and commercial coating were deposited on Inconel 617 substrate with high velocity oxygen – fuel method. The microstructures, wear resistance, mechanical properties and worn surface morphologies of the coatings were comparatively analyzed as well by means of Scanning Electron Microscopy, energy dispersive X-ray analysis, pin-on disc wear test, micro and macro hardness tests. Results show that with increasing YSZ content unmelted particles increased in composite coatings. Adding YSZ to 10%, increase the hardness of composite coatings, but adding more YSZ to 15% increased porosity in coatings which led to decline in hardness. Adding YSZ to CoNiCrAlY coatings has been increased the wear resistance of composite coating, so that 5% YSZ coating with a protective oxide layer on the wear track has shown lowest level of wear rate.
Keywords:
CoNiCrAlY , YSZ , HVOF , Composite coating , Wear
Language:
Persian
Published:
Iranian Journal of Surface Science and Engineering, Volume:11 Issue: 23, 2015
Pages:
11 to 24
magiran.com/p1419180
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!