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.

Authors with CRIS profile

Involved external institutions

Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku Japan (JP)

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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