Paper Title:
A Feasibility Study of Electro-Spark Deposit 'Sandwich-Like' Coating on Thermal Sensitive Superalloy
  Abstract

Gas turbine components are subjected to high temperature and high stress during engine operation, so they often become physically damaged due to the formation of cracks, voids and worn surfaces. In order to develop a new process for repairing gas turbine components with high strength filler materials, an attempt has been made to prepare IN738/NiCrSi/IN738 sandwich-like coating on thermal sensitive superalloy IN738 substrate and heat-treat it in a vacuum furnace. The microstructure morphologies, hardness and element distribution of as-deposited and as- heat-treated coatings have been investigated. The results showed that there were lot of cracks and voids in the deposited ‘sandwich-like’ coating but they could be eliminated by heat treatment. The diffusion of activated element Si in the sublayer NiCrSi of ‘sandwich-like’ coating was beneficial to healing cracks.

  Info
Periodical
Advanced Materials Research (Volumes 148-149)
Edited by
Xianghua Liu, Zhengyi Jiang and Jingtao Han
Pages
783-787
DOI
10.4028/www.scientific.net/AMR.148-149.783
Citation
J. Zhang, M. C. Wang, Y. C. Zhai, "A Feasibility Study of Electro-Spark Deposit 'Sandwich-Like' Coating on Thermal Sensitive Superalloy", Advanced Materials Research, Vols. 148-149, pp. 783-787, 2011
Online since
October 2010
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: Zhen Bing Cai, Min Hao Zhu, Xiu Zhou Lin, Ji Liang Mo, Zhong Rong Zhou
Abstract:Nickel base Ni60 and cobalt base Co-Cr-W coatings were prepared on substrate of refractory alloy steel 4Cr14NiW2Mo by laser-cladding...
878
Authors: Xi Liang Dai, Sheng Hui Peng, An Yu Chen, Ke Jiu Lu
Abstract:The performance of Aluminum alloy cylinder at high temperature largely depends on its inner surface hardness and wear resistance. In order to...
1151
Authors: Yu Xin Gao, Cheng Zhao, Zhi Gang Fang, Jian Yi
Abstract:Micro-nanostructure coatings have been attempted to prepare by Electro-spark deposition (ESD) on cast iron substrate. The microstructures and...
176
Authors: Lan Yun Qin, Guang Yang, Wei Wang, Ming Tong, Xing Liang Wang
Abstract:TiC reinforced titanium matrix functionally graded materials (FGM) has been produced by processes of laser metal deposition through changing...
316
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