Effect of nonstoichiometric TiN0.3 on diffusion behavior in TaC–TiN0.3 system

Qiao, Liang; Liu, Mingyue; Zhao, Yucheng; Yang, Qian; Zou, Qin; Wang, Xianghui; Wang, Likun; Guo, Hongkai

doi:10.1016/j.ceramint.2015.05.092

Cited by 18 publications

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“…Besides, the carbon vacancy defects in nonstoichiometric TiC x could promote diffusion and reduce sintering temperature greatly 11 . The researches of Qiao et al 12,13 proved that nonstoichiometric compounds of TiN 0.3 could improve the diffusion behavior and sintering process of TaC and Al 2 O 3 ceramics. Moreover, the addition of nonstoichiometric carbides could promote the single-phase formation of various metal carbides, reduce sintering temperature, improve hardness, and fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and characterization of medium‐entropy carbide ceramics in low temperature sintering

Zou

et al. 2022

Int J Applied Ceramic Tech

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The medium-entropy carbide (W,Ti,V)C 0.8 ceramics were prepared by sparking plasma sintering at temperatures between 1400 and 1700 • C. The effects of sintering temperature on the microstructure and mechanical properties of the medium-entropy carbide (W,Ti,V)C 0.8 ceramics were investigated. X-ray diffraction, scanning electron microscope, and energy dispersive spectrometer were used to confirm the formation of single-phase face-centered cubic (FCC) solid solution of the medium-entropy carbide (W,Ti,V)C 0.8 ceramics prepared at a sintering temperature of 1600 • C. It was found that the mechanical properties of the material were improved by solid solution strengthening during the formation of single-phase FCC solid solution, and the best overall performance of the medium-entropy carbide (W,Ti,V)C 0.8 ceramics was achieved at 1600 • C, when the hardness value was 22.3 ± 1.8 GPa, the fracture toughness was 5.7 ± 0.8 MPa⋅m 1/2 , the flexural strength was 605 ± 4 MPa, and the compressive strength was 1.84 GPa. Most importantly, the addition of TiC 0.4 promoted the diffusion among the elements of the medium-entropy carbide (W,Ti,V)C 0.8 ceramics, which contributed to the formation of single-phase FCC solid solution and significantly reduced the sintering temperature of the medium-entropy carbide (W,Ti,V)C 0.8 ceramics due to the effect of vacancies. This study provides a new idea for the preparation of medium-entropy carbide ceramics.

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Section: Introductionmentioning

confidence: 99%

“…Besides, the carbon vacancy defects in nonstoichiometric TiC x could promote diffusion and reduce sintering temperature greatly 11 . The researches of Qiao et al 12,13 . proved that nonstoichiometric compounds of TiN 0.3 could improve the diffusion behavior and sintering process of TaC and Al 2 O 3 ceramics.…”

Section: Introductionmentioning

confidence: 99%