Paper Title:
Preparing of NiAl and Ni3Al Intermetallic Composite Coatings by Laser Cladding In Situ Synthesis
  Abstract

Ni-Al intermetallic compound coatings no visible cracks, pores or inclusions are prepared on mild steel substrate by Laser- cladding in situ synthesis with mixed powders of nickel-coated aluminum, Ni-based alloy and Al. The results show that the microstructure of the coating consists mainly of two phases of NiAl and Ni3Al, and the former amount is more than the latter, with NiAl being uniformity and staggered fine dendrites which are surrounded continuously by Ni3Al, and the atom ratios of Ni∶Al∶Fe∶Si in NiAl and Ni3Al are respectively 54∶39∶2∶5 and 70∶21∶3∶6. Compared with cladding nickel-coated aluminum, the coatings quality are improved, and the dilution of iron from substrate into coating are greatly reduced, as a result of lower cladding powers due to self-fluxing of Ni-based alloy and exothermic reaction between Ni and Al. The hardness of coatings are up to HV490-HV540.

  Info
Periodical
Advanced Materials Research (Volumes 239-242)
Edited by
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Pages
636-641
DOI
10.4028/www.scientific.net/AMR.239-242.636
Citation
G. P. Cheng, Y. Z. He, "Preparing of NiAl and Ni3Al Intermetallic Composite Coatings by Laser Cladding In Situ Synthesis", Advanced Materials Research, Vols. 239-242, pp. 636-641, 2011
Online since
May 2011
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.

Authors: Lei Zhao, Rong Lu Sun, Yi Wen Lei
Abstract:NiCrBSi+Ti+C and NiCrBSi+TiC composite coatings were fabricated on H13 steel substrate by laser claddings to improve its wear resistance. The...
407
Authors: Hu Cheng, Zhi Gang Fang, Sheng Dai, Xian Rui Zhao, Jian Yi
Chapter 2: Metal Casting Processes and Equipment
Abstract:The Co-based alloy coatings were successfully fabricated on H13 steel by Nd:YAG and CO2 laser. The microstructure and properties...
1665
Authors: Xin Tong, Ming Jiang Dai, Min Liu
Chapter 9: Laser Processing Technology
Abstract:Die-casting plunger often fails due to serious wear on its cylindrical surface. The scrap of plunger used in large die-casting machine...
1843
Authors: Xue Chen Li, Hao Liang Tian, Shi Cheng Wei, Hui Tong, Cheng Zhao, Bin Shi Xu
Chapter 1: Material Engineering and its Application Technology
Abstract:This paper reports on a new clad technology that is protective coating cladding. The method is that the Ni60 alloy was prepared on 0.45%C...
194
Authors: Huan He, Wei Hua Guo, Min Xiao, Xing Zhi Pang, Xiao Ming Shen, Yue Chun Fu, Jian Min Zeng
Chapter 12: Surface Engineering/Coatings
Abstract:Al3Ti-based intermetallic compound coatings were formed on AA6063 aluminum alloy by laser cladding. The microstructure, wear and corrosion...
1897