Nb2AlC-particle induced accelerated crack healing in ZrO2–matrix composites

Stumpf M, Fey T, Kakimoto K, Greil P (2018)


Publication Type: Journal article, Original article

Publication year: 2018

Journal

Book Volume: 44

Pages Range: 19352-19361

Journal Issue: 16

URI: https://www.sciencedirect.com/science/article/pii/S0272884218319072

DOI: 10.1016/j.ceramint.2018.07.164

Abstract

The oxidation induced crack healing behavior of pre-cracked Nb2AlC particle loaded ZrO2-matrix composites was explored by annealing in air at 1200 °C for short periods of 10 and 20 min. Composites loaded with 0, 6.5, 13, and 19.5 vol. % Nb2AlC powder dispersed in 3Y-TZP matrix powder were manufactured by spark plasma sintering (SPS) at 1300 °C. Semi-elliptical artificial surface cracks with a length exceeding 220 µm were produced by Vickers indentation. The modulus of rupture of virgin, indented and annealed samples was measured in three-point bending mode. Compared to single phase 3Y-TZP strength recovery of the Nb2AlC loaded composite upon annealing at 1200 °C in air is accelerated and reaches > 60% of the initial strength after a short healing period of 10 min only. A semi-empirical oxidation cohesive zone healing model was derived which describes the crack microstructure evolution as a combined effect of 3Y-TZP-matrix healing superimposed by Nb2AlC particle oxidation induced healing.

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How to cite

APA:

Stumpf, M., Fey, T., Kakimoto, K., & Greil, P. (2018). Nb2AlC-particle induced accelerated crack healing in ZrO2–matrix composites. Ceramics International, 44(16), 19352-19361. https://doi.org/10.1016/j.ceramint.2018.07.164

MLA:

Stumpf, Martin, et al. "Nb2AlC-particle induced accelerated crack healing in ZrO2–matrix composites." Ceramics International 44.16 (2018): 19352-19361.

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