Room temperature preparation of Ti₂AlC MAX-phase films using the powder aerosol deposition method

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008875
URN to cite this document: urn:nbn:de:bvb:703-epub-8875-0

Title data

Groß, Andrea ; Paulus, Daniel ; Scholz, Till ; Moos, Ralf ; Schönauer-Kamin, Daniela:
Room temperature preparation of Ti₂AlC MAX-phase films using the powder aerosol deposition method.
In: Ceramics International. Vol. 51 (2025) Issue 28, Part C . - pp. 59777-59788.
ISSN 1873-3956
DOI der Verlagsversion: https://doi.org/10.1016/j.ceramint.2025.10.205

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Abstract

The MAX-phase Ti2AlC is interesting as a temperature-stable electrical contact material and, due to the formation of a protective alumina scale on the surface, also as an oxidation-resistant and self-healing coating. For the first time, the powder aerosol deposition method (PADM) is applied to prepare homogenous Ti2AlC-films directly from the raw powder at room temperature. Besides the material's microstructure, initial tests address the thermal stability and the electrical resistivity of PADM-Ti2AlC. μm-sized Ti2AlC-particles are deposited as adhesive, up to 20 μm thick and dense Ti2AlC-films on electrically insulating alumina or turbine-relevant titanium aluminides. The PADM-Ti2AlC films with an average roughness of about 1 μm exhibit a nanocrystalline microstructure and retain the phase composition of the applied powder. Initial results on the thermal stability of PADM-Ti2AlC in air up to 800 °C are promising: The film-integrity is preserved and light discolorations as well as slight film growth indicate oxide formation at the surface. Moderate thermal annealing of PADM-films is known to relax microstrain that origins from the high-energy particle impact and limits electrical conductivity. Accordingly, the resistivity of PADM-Ti2AlC is reduced by 68 % after annealing at 800 °C in nitrogen atmosphere. The final value of 6.8 μΩm of the nanocrystalline PADM-films is one order of magnitude above those of common thin-films. Electrical measurements as well as SEM images indicate the formation of surficial oxide during heat treatment in air.

Further data

Item Type:	Article in a journal
Keywords:	Powder aerosol deposition (PAD); MAX-phase Ti2AlC; A. Films; B. Grain size
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos Profile Fields > Advanced Fields > Advanced Materials Research Institutions > Central research institutes > Bayreuth Center for Material Science and Engineering - BayMAT Faculties Faculties > Faculty of Engineering Science > Chair Functional Materials Profile Fields Profile Fields > Advanced Fields Research Institutions Research Institutions > Central research institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8875-0
Date Deposited:	10 Feb 2026 14:33
Last Modified:	10 Feb 2026 14:33
URI:	https://epub.uni-bayreuth.de/id/eprint/8875

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