Low temperature spark plasma sintering of Al2O3–TiC composites

Meir, S.; Kalabukhov, Sergey; Hayun, Shmuel

doi:10.1016/j.ceramint.2014.04.059

Cited by 26 publications

(7 citation statements)

References 15 publications

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“…1). When comparing the dL/dt curve to similar curves from previous studies on Al 2 O 3 /TiC composites [16], the shape of peak 1 was quite unusual. In the case where only mechanical compaction occurred, the densification rate should parallel the speed of the applied force and remain constant.…”

Section: Sintering Behaviormentioning

confidence: 52%

Mechanical properties of Al2O3\Ti composites fabricated by spark plasma sintering

Meir

Kalabukhov

Frage

et al. 2015

Ceramics International

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Section: Sintering Behaviormentioning

confidence: 52%

Mechanical properties of Al2O3\Ti composites fabricated by spark plasma sintering

Meir

Kalabukhov

Frage

et al. 2015

Ceramics International

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“…Grain growth of Al 2 O 3 occurs easily during sintering and the inhibition effect of large second phase TiC particles on this growth is negligible. For example, when Al 2 O 3 powder (size: ~0.8 μm) and coarse TiC powder (size: ~5 μm) are used as raw materials, significant growth of Al 2 O 3 yielded an Al 2 O 3 grain size of 3 μm in the fabricated Al 2 O 3 ‐TiC composites 21 . However, using a fine TiC powder leads (in general) to an increase in the fabrication cost.…”

Section: Introductionmentioning

confidence: 99%

“…For example, when Al 2 O 3 powder (size: ~0.8 μm) and coarse TiC powder (size: ~5 μm) are used as raw materials, significant growth of Al 2 O 3 yielded an Al 2 O 3 grain size of 3 μm in the fabricated Al 2 O 3 -TiC composites. 21 However, using a fine TiC powder leads (in general) to an increase in the fabrication cost. Previous studies have reported that in situ reaction synthesis produces composites with more homogeneous microstructures (than those resulting from conventional methods) even from coarse starting powders.…”

mentioning

confidence: 99%

Fine TiC dispersed Al₂O₃ composites fabricated via in situ reaction synthesis and conventional process

et al. 2021

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To further improve the mechanical performance and reduce the percolation threshold by controlling microstructures, Al2O3‐TiC composites containing 0‐20 vol% TiC were fabricated via in situ reaction synthesis. Graphite (ATC) and carbon nanotubes (ATCT) were used as carbon sources. The composites were also fabricated via a conventional process using a TiC starting powder (AT). X‐ray diffraction analysis and scanning electron microscopy observation results indicated successful fabrication of the composites with various microstructures. TiC particles in ATCT were completely dispersed at grain boundaries, whereas in ATC and AT, these particles were either intragranular or intergranular dispersed. The composites could be listed as follows, ATCT > ATC > AT, that is, in descending order of the reinforcing flexural strength and fracture toughness. The nanoindentation measurement indicated the optimum hardening effect of ATCT. The ATCT composite also exhibited the highest fracture toughness, which was 49% higher than that of the monolithic Al2O3. Crack deflection was considered as the main toughening mechanism while crack bridging behavior also occurred in ATCT. For a given TiC content, ATCT exhibited the lowest electrical resistivity, owing mainly to the complete grain‐boundary dispersion of the relatively large TiC particles. The similarity of the Al2O3 grain size and TiC particle size of ATCT contributed to the lowest percolation threshold achieved (11.2%), which (to date) is the lowest value that has been reported for the Al2O3‐TiC system.

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“…Both the domestic and foreign researches indicate [3][4][5][6][7][8][9] that the addition of TiC and TiN particles into Al 2 O 3 matrix can improve the flexural strength and the fracture toughness. Titanium carbide (TiC) possesses high hardness (32 GPa) and high melting point (3140°C).…”

Section: Introductionmentioning

confidence: 99%

“…Titanium carbide (TiC) possesses high hardness (32 GPa) and high melting point (3140°C). TiC particles can stop the original crack from growing as a result of pinning effects [3,4]; therefore, the strength, hardness, thermal shock stabilities and thermal conductivity of alumina ceramics can be increased. The toughening mechanism is revealed by the crack deflection and bridging observed in the microstructure of Al 2 O 3 -TiC composites [5].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Ni Addition on the Microstructures and Mechanical Properties of Al2O3–TiN–TiC Ceramic Materials

et al. 2018

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Al 2 O 3 -TiN-TiC ceramic materials with different Ni content were fabricated by hot-pressing technique. Mechanical properties such as flexural strength, Vickers hardness and fracture toughness were obtained by three-point-bending test and Vickers indentation method. The microstructures of the sintered body were observed by scanning electron microscopy. The effects of Ni content on the microstructures and the mechanical properties of Al 2 O 3 -TiN-TiC ceramic materials were investigated. The results indicated that the addition of Ni could change the topography of the microstructures which displayed various core-shell structures. Moreover, the fracture mode changed with the increment of Ni content. When the addition of Ni was 3 vol%, the flexural strength and fracture toughness were the greatest and the improvement could be explained by the unique microstructures of sintered bodies.

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Low temperature spark plasma sintering of Al2O3–TiC composites

Cited by 26 publications

References 15 publications

Mechanical properties of Al2O3\Ti composites fabricated by spark plasma sintering

Mechanical properties of Al2O3\Ti composites fabricated by spark plasma sintering

Fine TiC dispersed Al₂O₃ composites fabricated via in situ reaction synthesis and conventional process

The Influence of Ni Addition on the Microstructures and Mechanical Properties of Al2O3–TiN–TiC Ceramic Materials

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Low temperature spark plasma sintering of Al2O3–TiC composites

Cited by 26 publications

References 15 publications

Mechanical properties of Al2O3\Ti composites fabricated by spark plasma sintering

Mechanical properties of Al2O3\Ti composites fabricated by spark plasma sintering

Fine TiC dispersed Al2O3 composites fabricated via in situ reaction synthesis and conventional process

The Influence of Ni Addition on the Microstructures and Mechanical Properties of Al2O3–TiN–TiC Ceramic Materials

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Fine TiC dispersed Al₂O₃ composites fabricated via in situ reaction synthesis and conventional process