Point contact abrasive wear behavior of MAX phase materials

Point contact abrasive wear behavior of MAX phase materials

Qu, L. (TU Delft (OLD) MSE-1; Harbin Engineering University)
Bei, G. (TU Delft (OLD) MSE-1)
Nijemeisland, M. (TU Delft Delft Aerospace Structures and Materials Laboratory)
Cao, Dianxue (Harbin Engineering University)
van der Zwaag, S. (TU Delft Novel Aerospace Materials)
Sloof, W.G. (TU Delft (OLD) MSE-1)

2019

The room temperature abrasive wear behavior of three selected MAX phases, Ti₃SiC₂, solution strengthened Ti_2.7Zr_0.3SiC₂ and Cr₂AlC, is investigated by low velocity scratch testing using a diamond conical indentor with a final radius of 100 μm and a cone angle of 120° and applied loads of up to 20 N. All three materials showed a relatively low wear resistance in comparison to most engineering ceramics such as Al₂O_3, Si₃N₄ and SiC. For all three materials, the wear rate scaled more or less linearly with the applied load. The softer Ti₃SiC₂ with a hardness of 2.8 GPa showed the lowest wear resistance with extensive ploughing and grain breakout damage, both within and outside the direct wear track, in particular at the highest load. The hardest material, Ti_2.7Zr_0.3SiC₂, with a hardness of 7.3 GPa, showed a 5 times better wear resistance. The Cr₂AlC with a hardness of 4.8 GPa showed a wear resistance equal to or even better than that of the Ti_2.7Zr_0.3SiC₂. The wear mechanism depends on the applied load and the microstructure of the MAX phase materials tested. For the Ti₃SiC₂ sample, a quasi-plastic deformation behavior occurs below a point load of 10 N, resulting in grain bending, kink band formation and delamination, grain de-cohesion, as well as trans-and intra-granular fracture near the scratch groove. At this load, the Ti_2.7Zr_0.3SiC₂ and Cr₂AlC MAX samples display plastic ploughing, grain boundary cracks and material dislodgments.

MAX phase
Microstructure
Scratch damage
Wear resistance

http://resolver.tudelft.nl/uuid:126c4f09-4252-4508-8123-eff03101a438

https://doi.org/10.1016/j.ceramint.2019.09.145

2020-03-01

0272-8842

Ceramics International, 46 (2), 1722-1729

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2019 L. Qu, G. Bei, M. Nijemeisland, Dianxue Cao, S. van der Zwaag, W.G. Sloof