Nb2AlC-Particle-Reinforced ZrO2-Matrix Composites

Stumpf M, Biggemann J, Fey T, Kakimoto KI, Greil P (2018)


Publication Type: Journal article, Original article

Publication year: 2018

Journal

Book Volume: 9

Pages Range: 271-278

Journal Issue: 3

DOI: 10.4416/JCST2018-00013

Abstract

Nb2AlC-particle-loaded ZrO2-matrix composites were manufactured by means of pressureless sintering (PS) and spark plasma sintering (SPS) at 1300 °C. The MAX phase Nb2AlC was synthesized based on the reaction of Nb, NbC and Al powder mixtures at 1600 °C in Ar-atmosphere. Nb2AlC formation was confirmed with XRD and ICP-OES. Nano-particulate tetragonal 3Y-TZP powder was mixed with Nb2AlC powder with a mean particle size of 7.93 µm up to a volume fraction of 19.5 %. While the microstructure of the PS composites revealed a residual porosity of 20 – 22 %, almost dense materials with a residual porosity ≤ 2.35 % were obtained by means of SPS. With increasing Nb2AlC fraction a significant improvement of the mechanical properties was observed. An increase in fracture toughness of up to 46 % (PS) and 67 % (SPS) measured on composites loaded with 19.5 vol% Nb2AlC compared to pure 3Y-TZP was attributed to crack bridging of Nb2AlC particles which, depending on the orientation, may attain high strain values owing to basal slip and kink band formation.

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How to cite

APA:

Stumpf, M., Biggemann, J., Fey, T., Kakimoto, K.-I., & Greil, P. (2018). Nb2AlC-Particle-Reinforced ZrO2-Matrix Composites. Journal of Ceramic Science and Technology, 9(3), 271-278. https://doi.org/10.4416/JCST2018-00013

MLA:

Stumpf, Martin, et al. "Nb2AlC-Particle-Reinforced ZrO2-Matrix Composites." Journal of Ceramic Science and Technology 9.3 (2018): 271-278.

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