| Issue |
Manufacturing Rev.
Volume 7, 2020
Special Issue - The emerging materials and processing technologies
|
|
|---|---|---|
| Article Number | 33 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.1051/mfreview/2020031 | |
| Published online | 23 September 2020 | |
Research Article
Microstructural aspects of the protective ceramic coatings applied on the surfaces of refractory alloys produced by additive manufacturing
1
National Research and Development Institute for Non-Ferrous and Rare Metals −IMNR, 102 Biruintei Blvd.,
Pantelimon, jud Ilfov, 077145, Romania
2
National Research and Development Institute for Gas Turbines − COMOTI, 220 D Iuliu Maniu Bd.,
061126 Bucharest 6, Romania
* e-mail: rpiticescu@imnr.ro
Received:
11
May
2020
Accepted:
4
September
2020
The possibility of depositing multi layers made of metals/alloys and high temperature ceramics by electron beam physical evaporation process under high vacuum (EB-PVD) on the surface of a parallelepiped sample made by selective laser melting (SLM) from a Ni base refractory super alloy was experimentally tested. The SEM-EDAX micro structural analysis revealed the morphology and thickness of the coatings consisting of a NiCrAlY base alloy as bonding layer and three successive YSZ, LZO and GZO ceramic layers on the Ni-based super alloy substrate obtained by additive manufacturing. The adhesion of the layer deposited was evaluated by the scratch test method. The analysis highlighted the importance of pre-preparing the surface of the additive manufactured substrates, in order to control the adhesion and uniformity of the deposited layers.
Key words: Ni-base superalloys / ceramic coatings / SLM / EB-PVD / scratch test
© A. Sobetkii et al., Published by EDP Sciences 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.