| Download | - View final version: Deposition, microstructure and hardness of AlCoCrFeNi₂.₁ eutectic high entropy alloy coatings by cold spray, HVOF, and plasma spray (PDF, 8.9 MiB)
|
|---|
| DOI | Resolve DOI: https://doi.org/10.1016/j.surfcoat.2024.131442 |
|---|
| Author | Search for: Wei, Jingjie; Search for: Cojocaru, Cristian1; Search for: Aghasibeig, Maniya1ORCID identifier: https://orcid.org/0009-0004-0628-7169; Search for: Shao, Chenwei; Search for: Li, Zehua; Search for: Zhang, Jiahui; Search for: Irissou, Eric1ORCID identifier: https://orcid.org/0000-0002-0691-9152; Search for: Zou, Yu |
|---|
| Affiliation | - National Research Council of Canada. Automotive and Surface Transportation
|
|---|
| Funder | Search for: National Research Council Canada |
|---|
| Format | Text, Article |
|---|
| Subject | cold spray; HVOF; plasma spray; high entropy alloy; microstructure |
|---|
| Abstract | Eutectic high entropy alloys (EHEAs) are reported to exhibit excellent mechanical properties which are useful for coating applications. In this study, we have produced AlCoCrFeNi₂.₁ EHEA coatings using the cold spray, high velocity oxygen-fuel (HVOF), and plasma spray techniques and compared their bonding characteristics, microstructure and hardness. We observe body-centered cubic (bcc) to face-centered cubic (fcc) phase transformations in all the types of coatings. The high processing temperatures in HVOF and plasma sprays lead to the segregation and depletion of Al from Ni-and Al-rich bcc/B2 regions and form Al₂O₃. In the cold sprayed coatings, we observe that a fraction of lamellar microstructure is preserved after cold spraying. Regarding the hardness, the cold sprayed coatings exhibit hardness in the range of 440–498 HV due to high work hardening and low oxygen content below 4 at.%; the HVOF coatings show the hardness in the range of 380–556 HV due to the effects of oxide dispersion strengthening with 13–28 at.% oxygen; The plasma sprayed coatings exhibit the hardness in the range 208–258 HV and 6.1–13.4 at.% oxygen. This study demonstrates the feasibility to produce thick and dense EHEA coatings using the above spray techniques, and the cold sprayed coatings exhibit relatively high hardness and low oxygen levels. |
|---|
| Publication date | 2024-10-09 |
|---|
| Publisher | Elsevier |
|---|
| Licence | |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| Identifier | S0257897224010739 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | a858f733-39be-46a1-9619-3cbf3f6fdd94 |
|---|
| Record created | 2024-10-30 |
|---|
| Record modified | 2025-11-03 |
|---|
