Investigation of microstructural, hardness, and wear properties of AlCrCuFeNi high entropy alloys produced by hot-pressing with the enhancement of manufacturability through electroless Ag incorporation
Tribology International, vol.201, 2025 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 201
- Publication Date: 2025
- Doi Number: 10.1016/j.triboint.2024.110277
- Journal Name: Tribology International
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
- Keywords: Electroless silver coating, High-entropy alloy, Hot-pressing, Tribological properties
- Karadeniz Technical University Affiliated: Yes
Abstract
This study involves the production of HEA materials using low-temperature and high-pressure principles by mechanical-alloying AlCrCuFeNi high-entropy alloy powders, followed by electroless Ag coating for enhanced interface properties and hot-pressing without additional sintering. The Ag interface significantly improved the bonding of HEA powders. While increasing temperature causes a 10 % weight gain due to oxidation in HEA samples, this rate is only 1.5 % in those produced with Ag-coated HEA. The Ag interface improved the hardness of the HEAs by 50 %. The wear rate was reduced by more than twofold due to the Ag-interfaces. Ag exhibited a self-lubricating effect due to the Ag layers that repeatedly emerge during sliding, resulting in a low friction coefficient of 0.19 and excellent wear resistance.