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Preparation and characterization of NiAl–TiC–TiB2 intermetallic matrix composite coatings by atmospheric plasma spraying of SHS powders.
- Source :
-
Ceramics International . Jun2020:Part A, Vol. 46 Issue 8, p10512-10520. 9p. - Publication Year :
- 2020
-
Abstract
- NiAl–TiC–TiB 2 intermetallic matrix composite coatings with various TiC–TiB 2 contents were fabricated by depositing self-propagating high-temperature synthesized (SHS) NiAl–TiC–TiB 2 powders using atmospheric plasma spraying (APS) technique. The preparation process was carefully investigated and the effects of TiC–TiB 2 contents on the physical and chemical properties of the composite coating were studied. Results indicate that SHS synthesized NiAl–TiC–TiB 2 intermetallic matrix materials show high purity. The TiC–TiB 2 particles are well dispersed in the NiAl matrix. There is no obvious oxidation in the composite coating during the APS process. With an increase in TiC–TiB 2 contents, the hardness of NiAl–TiC–TiB 2 composite coating is increased, while the thermal expansion coefficient (TEC) of the coating is decreased. NiAl–TiC–TiB 2 intermetallic matrix composite coating with moderate TiC–TiB 2 content shows the best corrosion resistance. Few TiC–TiB 2 particles in NiAl promote the formation of the continuous Al 2 O 3 film without destroying the integrity of the film improving the corrosion resistance of the coating. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 46
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 142499318
- Full Text :
- https://doi.org/10.1016/j.ceramint.2020.01.052