Investigating the Abrasive Wear Resistance of Thermal-Sprayed WC-Based Coatings
Author(s):
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
The purpose of this research was to investigate the abrasive wear behavior of WC–NiMoCrFeCo (WC-N) and WC–FeCrAl (WC-F) coatings deposited by high-velocity oxygen fuel (HVOF) spraying. The abrasive wear resistance was evaluated by a dry sand rubber wheel (DSRW) test rig using abrasives silica 70 and alumina 60, and the values were then compared to those of conventional WC-Co (WC-C) coatings. The abrasive wear with silica 70 indicated the “soft abrasion” regime, while alumina 60 abrasive caused a “hard abrasion” for all coatings. Moreover, the wear rate of the coatings abraded by alumina 60 was around 1.2-7.8 times greater than that of silica 70. WC-F exhibited the greatest wear resistance compared to other coatings tested by silica 70 due to its lower mean free path and higher hardness compared to other coatings. WC-C coating revealed the cobalt matrix removal followed by WC fracture and pullout using abrasive silica 70, while WC-F and WC-N coatings represented a combination of subsurface cracking, WC pullout, and fracture. Abraded by alumina 60, WC-C, WC-F, and WC-N coatings showed the evidence of grooving, pitting, and cutting. Moreover, WC-C coating had the highest wear resistance due to its high fracture toughness and low porosity, protecting WC-C coating against severe cracking and grooving, respectively. Cross-sectional images of the wear scars revealed a significant sub-surface cracking for WC-F and WC-N coatings while no significant cracking could be detected for WC-C coating.
Keywords:
Language:
English
Published:
Advanced Ceramics Progress, Volume:6 Issue: 2, Spring 2020
Pages:
7 to 16
magiran.com/p2148907
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!