Influence of Plasma Intensity on Wear and Erosion Resistance of Conventional and Nanometric WC-Co Coatings Deposited by APS |
| |
Authors: | V. Bonache M. D. Salvador J. C. García E. Sánchez E. Bannier |
| |
Affiliation: | 1.Instituto de Tecnología de Materiales,Universidad Politécnica de Valencia,Valencia,Spain;2.Instituto de Tecnología Cerámica, Asociación de Investigación de las Industrias Cerámicas,Universitat Jaume I,Castellón,Spain |
| |
Abstract: | The effects of plasma intensity and powder particle size on wear and erosion resistance have been evaluated for WC-12 wt.%Co coatings deposited by Air Plasma Spraying. Coatings were deposited from micrometric and nanostructured powders. SEM and XRD characterization showed the presence of WC, W2C, W, and an amorphous Co-rich matrix. The performance of the different coatings was compared in sliding wear tests (ball-on-disk), under dry friction conditions. Wear debris and tracks were analyzed by SEM. The debris generated during the test was found to have a great influence on the sliding properties. Wear follows a “three-body abrasive mechanism” and is dominated by coating spallation because of sub-surface cracking. In order to evaluate erosion behavior, solid particle erosion tests were conducted. Eroded coatings were analyzed by SEM, and erosion mainly occurs by a “cracking and chipping mechanism.” The study shows that wear and erosion behavior is strongly affected by plasma arc intensity. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|