Paper Title:
Properties of WC-Co Ceramic Coatings of Ultra-Fine Grains Prepared by Electro-Thermal Explosion Method
  Abstract

The high velocity spraying experiments for preparing WC-Co ceramic coatings were carried out by using an electro-thermal explosion directional spraying device. The transient parameters of both the discharge circuit and the voltage applied to the WC-Co sheet were measured. Velocity of the shock wave in the explosive spraying nozzle was approximately measured and that was described with a one-directional piston model. The velocity of molten particles of WC-Co ceramics was estimated to be about 3162m/s. The microstructures and micro-hardness of the WC-Co coating, the interface between the coating and substrate were analyzed in details. The visible WC grain diameter of the coating ranges from 70 to 350nm, and the average value is 195nm. A metallurgical bonding layer with a thickness of about 1 was found at the interface. The values of micro-hardness of the coating are 1-1.4 times of the original one, and the micro-hardness near the interface is much higher than that of the substrate

  Info
Periodical
Key Engineering Materials (Volumes 261-263)
Edited by
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
Pages
423-428
DOI
10.4028/www.scientific.net/KEM.261-263.423
Citation
Z. D. Liu, K. Yang, S. L. Bai, P. Duan, "Properties of WC-Co Ceramic Coatings of Ultra-Fine Grains Prepared by Electro-Thermal Explosion Method", Key Engineering Materials, Vols. 261-263, pp. 423-428, 2004
Online since
April 2004
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.