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Special Issue:
SPECIAL TOPIC — Structures and properties of materials under high pressure
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| SPECIAL TOPIC — Structures and properties of materials under high pressure |
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Heterogeneous TiC-based composite ceramics with high toughness |
| Xiaoci Ma(马孝慈)1,†, Yufei Ge(葛雨非)2,†,‡, Yutong Hou(侯语同)1, Keyu Shi(施柯羽)1, Jiaqi Zhang(张佳琪)1, Gaoping Yue(岳高平)1, Qiang Tao(陶强)1, and Pinwen Zhu(朱品文)1,§ |
1 Synergetic Extreme Condition High-Pressure Science Center, State Key Laboratory of High Pressure and Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
2 School of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130018, China |
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Abstract Electrically conductive carbide ceramics with high hardness and fracture toughness are promising for advanced applications. However, enhancing both electrical conductivity and fracture toughness simultaneous is challenging. This study reports the synthesis of (Ti$_{0.2}$W$_{0.2}$Ta$_{0.2}$Hf$_{0.2}$Mo$_{0.2}$)C-diamond composites with varying densities using high-pressure and high-temperature (HPHT) method. The carbides are uniformly dispersed in a titanium carbide matrix, forming conductive channels that reduce resistivity to 4.6$\times10^{-7}$ $\Omega $$\cdot$m. These composite materials exhibit metallic conductivity with a superconducting transition at 8.5 K. Superconducting behavior may result from d-p orbital hybridization and electron-phonon coupling in transition metal carbides, such as TaC, Mo$_{2}$C, and MoC. Optimizing intergranular bonding improves the fracture toughness without compromising hardness. The highest indentation toughness value is $10.1 \pm 0.4 $ MPa$\cdot$m$^{1/2}$, a 130% increase compare to pure TiC. Enhanced toughness arises from transgranular and intergranular fracture modes, multiple crack bridging, and large-angle crack deflection, which dissipate fracture energy and inhibit crack propagation. This study introduces a novel microstructure engineering strategy for carbide ceramics to achieve superior mechanical and electrical properties.
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Received: 28 February 2025
Revised: 28 April 2025
Accepted manuscript online: 08 May 2025
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PACS:
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61.50.-f
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(Structure of bulk crystals)
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61.72.U-
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(Doping and impurity implantation)
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62.20.-x
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(Mechanical properties of solids)
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61.66.Fn
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(Inorganic compounds)
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| Fund: The authors acknowledge “B1 station, Synergetic Extreme Condition User Facility (SECUF)” for all of highpressure experiments. The authors acknowledge funding support from the Science and Technology Development Project of Jilin Province (Grant No. SKL202402004), the Program for the Development of Science and Technology of Jilin Province (Grant No. YDZJ202201ZYTS308), and the Open Research Fund of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (Jilin University, Grant Nos. 2022-16 and 2022-23). |
Corresponding Authors:
Yufei Ge, Pinwen Zhu
E-mail: geyufei@jlju.edu.cn;zhupw@jlu.edu.cn
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Cite this article:
Xiaoci Ma(马孝慈), Yufei Ge(葛雨非), Yutong Hou(侯语同), Keyu Shi(施柯羽), Jiaqi Zhang(张佳琪), Gaoping Yue(岳高平), Qiang Tao(陶强), and Pinwen Zhu(朱品文) Heterogeneous TiC-based composite ceramics with high toughness 2025 Chin. Phys. B 34 086104
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