Journal
APPLIED SURFACE SCIENCE
Volume 253, Issue 7, Pages 3496-3502Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2006.07.053
Keywords
cold spray; Al-Ni; annealing; composite; coatings
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Funding
- Korea Institute of Industrial Technology(KITECH) [PM003-7-00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A new cold spray coating technique for thick Al coating with finely dispersed Al-Ni intermetallic compounds was tested. For easy powder preparation and high yield, rather than using of Al/compound mixture feed stock, the spraying of pure Al and Ni powders mixture followed by post-annealing was suggested. The powder composition of At and Ni was 75:25, and 90:10 (wt.%) to expect full consumption of pure Ni into intermetallic compounds. After Al-Ni composite coatings, the Ni particles were finely dispersed and embedded in the At matrix with a good coating yield. Above 450 degrees C of post-annealing temperature, the Al3Ni and Al3Ni2 phases were observed in the cold-sprayed Al-Ni coatings. The Ni particles in the Al matrix were fully consumed via compounding reaction with Al at 550 degrees C of the annealing temperature. (c) 2006 Elsevier B.V. All rights reserved.
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