Paper Title:
Effect of H-BN Content on Microstructures of the Laser Cladding Self- Lubricant Coatings
  Abstract

Self-lubricating Ni+h-BN coatings were prepared by CO2 laser cladding with powder mixtures of Ni60 and h-BN. The chemical compositions and microstructures of the coatings were analyzed using SEM and XRD. The microhardness of the coatings was measured on a microhardness tester. It was found that the morphology of CrB was changed from irregular block-like shape (in Ni60+5%h-BN coating) →short–plate structure (in Ni60+10%h-BN coating)→dendritic-plate structure(in Ni60+15%h-BN coating) with increasing the content of h-BN. The microhardness of the 5,10 and 15% h-BN coatings ranged from 650~800HV0.2, 800~1010HV0.2 and 1000~1200HV0.2, which was higher than that of Ni60 coating and substrate.

  Info
Periodical
Advanced Materials Research (Volumes 154-155)
Edited by
Zhengyi Jiang, Xianghua Liu and Jinglong Bu
Pages
609-612
DOI
10.4028/www.scientific.net/AMR.154-155.609
Citation
W. Niu, R. L. Sun, Y. W. Lei, "Effect of H-BN Content on Microstructures of the Laser Cladding Self- Lubricant Coatings", Advanced Materials Research, Vols. 154-155, pp. 609-612, 2011
Online since
October 2010
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Price
$32.00
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