Effect of At and Cr addition on tribological behaviour of HVOF and APS nanostructured WC-Co coatings

被引：17

作者：

Basak, A. K. ^{[1
]}

Achanta, S. ^{[1
]}

De Bonte, M. ^{[1
]}

Celis, J. P. ^{[1
]}

Vardavoulias, M. ^{[2
]}

Matteazzi, P. ^{[3
]}

机构：

[1] Katholieke Univ Leuven, Dept MTM, B-3001 Heverlee, Belgium

[2] PyroGenesis SA, Lavrion 19500, Greece

[3] MBN Nanomat SpA, CSGI, I-31050 Vascon, Italy

来源：

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING | 2007年 / 85卷 / 06期

关键词：

nanostructured coatings; thermal spraying; wear resistance; alloying elements; cermets;

D O I：

10.1179/174591907X229626

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nanostructured WC-Co based coatings were investigated. The main focus was given to the effect of Al and Cr addition on their tribological behaviour. These coatings were successfully deposited from engineered nanosized powders using high velocity oxy fuel (HVOF) and atmospheric plasma spraying (APS). Porosity level was < 3%. Crystal sizes of around 20-30 nm determined by TEM in such coatings, confirm the retention of a nanosize after thermal spraying. The nanostructured coatings were tested for their tribological characteristics and compared to industrial micrometre sized WC-Co coatings and common wear resistant engineering materials. It was found that decarburisation of the coating constituents is a critical issue and has a large impact on the tribological behaviour of the coatings. Proper selection of spraying technique, spraying parameters and distribution of phases are shown to be key factors for achieving nanostructured coatings with high wear resistance.

引用

页码：310 / 315

页数：6

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