Elaboration of ZrC-SiC composites by spark plasma sintering using polymer-derived ceramics

Lucas, Romain; Davis, Claire; Clegg, William; Pizon, David; Babonneau, Florence; Foucaud, Sylvie; Antou, Guy; Maı̂tre, Alexandre

doi:10.1016/j.ceramint.2014.07.093

Cited by 24 publications

(19 citation statements)

References 22 publications

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“…Several studies have attempted to improve the sinterability, microstructure, and mechanical properties of ZrC ceramics. Some studies have used secondary phases such as SiC, MoSi 2 , TaSi 2 , Si, Zr, ZrH 2 , C, MC (M = V, Nb, and Ta) as sintering additives . The addition of SiC is attractive because of its high temperature strength, wear and corrosion resistance, and thermal shock resistance .…”

Section: Introductionmentioning

confidence: 99%

“…The resulting ceramics had ZrC and SiC grain sizes of less than 1 μm, Vickers hardness of 18.8 ± 1.2 GPa, Young's modulus of 390.5 ± 6.9 GPa, flexure strength of 523.4 ± 19.6 MPa, and fracture toughness of 4.0 ± 0.3 MPa·m 1/2 . ZrC ceramics containing 0 to 40 wt% SiC which were prepared by SPS using polymer‐derived ceramics, had Young's modulus in the range of 252 to 442 GPa (ultrasonic method) and 290 to 451 GPa (nanoindentation method), and nanoindentation hardness values of 19 to 27 GPa . Ma et al investigated the effect of SiC contents on the microstructure and mechanical properties of ZrC ceramics containing 5 vol% graphite for SiC contents from 10 to 30 vol%.…”

Section: Introductionmentioning

confidence: 99%

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Densification, microstructure, and mechanical properties of ZrC–SiC ceramics

Fahrenholtz

Watts

et al. 2019

J Am Ceram Soc

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ZrC–SiC ceramics were fabricated by high‐energy ball milling and reactive hot pressing of ZrH2, carbon black, and varying amounts of SiC. The ceramics were composed of nominally pure ZrC containing 0 to 30 vol% SiC particles. The relative density increased as SiC content increased, from 96.8% for nominally pure ZrC to 99.3% for ZrC‐30 vol% SiC. As SiC content increased from 0 to 30 vol%, Young's modulus increased from 404 ± 11 to 420 ± 9 GPa and Vickers hardness increased from 18.5 ± 0.7 to 23.0 ± 0.5 GPa due to a combination of the higher relative density of ceramics with higher SiC content and the higher Young's modulus and hardness of SiC compared to ZrC. Flexure strength was 308 ± 11 MPa for pure ZrC, but increased to 576 ± 49 MPa for a SiC content of 30 vol%. Fracture toughness was 2.3 ± 0.2 MPa·m1/2 for pure ZrC and increased to about 3.0 ± 0.1 MPa·m1/2 for compositions containing SiC additions. The combination of high‐energy ball milling and reactive hot pressing was able to produce ZrC–SiC ceramics with sub‐micron grain sizes and high relative densities with higher strengths than previously reported for similar materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Densification, microstructure, and mechanical properties of ZrC–SiC ceramics

Fahrenholtz

Watts

et al. 2019

J Am Ceram Soc

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“…Therefore, there is very likely a loss of SiO(g) in the outlet gas during the carbothermal reduction, given the continuous consumption of SiC via side reaction until the formation of ZrC is completed, as presented in Equations (9) and (10). The presence of traces, identified as m-ZrO 2 in Figure 1, may be attributed to the loss of material through the volatilization of gaseous species (SiO and CO) in the outlet gas during the reduction reaction, leaving behind unreacted ZrO 2 .…”

Section: Resultsmentioning

confidence: 99%

Microwave-assisted Synthesis of a ZrC-SiC Nanocomposite by Carbothermal Reduction and its Effect on Mean Particle Size

Gaviría

Kiminami

2016

Mat. Res.

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ZrC-SiC nanopowders were prepared by carbothermal reduction of ZrO 2 and SiO 2 with carbon black in argon gas atmosphere, using microwave energy as an alternative heating source. The samples were characterized by XRD, SEM and BET surface area analysis. The results indicate that highly crystalline ZrC-SiC composites with a mean particle size of about 80 nm can be synthesized at a relatively low temperature (~1420 °C). Microwave-assisted heating to obtain the ZrC-SiC nanopowders significantly reduces the synthesis time to only 40 min when compared with the long reaction times involved in conventional carbothermal reduction, which requires about 8 hours to obtain ZrC and 2 hours to obtain SiC.

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“…This process was already described in a previous paper [16]. The first step was to crosslink the PCMS by heating in air for 10 h at 250°C.…”

Section: Powder Synthesismentioning

confidence: 99%

Thermomechanical properties of a spark plasma sintered ZrC–SiC composite obtained by a precursor derived ceramic route

Antou

Ohin

Lucas

et al. 2015

Materials Science and Engineering: A

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Elaboration of ZrC-SiC composites by spark plasma sintering using polymer-derived ceramics

Cited by 24 publications

References 22 publications

Densification, microstructure, and mechanical properties of ZrC–SiC ceramics

Densification, microstructure, and mechanical properties of ZrC–SiC ceramics

Microwave-assisted Synthesis of a ZrC-SiC Nanocomposite by Carbothermal Reduction and its Effect on Mean Particle Size

Thermomechanical properties of a spark plasma sintered ZrC–SiC composite obtained by a precursor derived ceramic route

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