Processing and properties of B4C ceramics reinforced with TiB2‒CrB2 solid solution.
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| Title: | Processing and properties of B |
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| Authors: | Li, Yuxiao1,2 (AUTHOR), Yang, Qingqing1,2 (AUTHOR), Zou, Ji1,2 (AUTHOR) ji.zou@whut.edu.cn, Qiu, Shuaihang1,2 (AUTHOR), Liang, Huayue1,2 (AUTHOR), Liu, Jingjing3 (AUTHOR) jingjingliu@whut.edu.cn, Ma, Haibin4 (AUTHOR), Ji, Wei1,2 (AUTHOR), Wang, Weimin1,2 (AUTHOR), Fu, Zhengyi1,2 (AUTHOR) |
| Source: | Journal of the American Ceramic Society. Sep2025, Vol. 108 Issue 9, p1-13. 13p. |
| Subjects: | Vickers hardness, Flexural strength, Fracture toughness, Grain refinement, Composite materials, Boron carbides |
| Abstract: | Lightweight boron carbide (B4C)‐based composites with optimized mechanical properties were consolidated at 1850°C‒1900°C through a combination of carbide boronizing and spark plasma sintering, with (Ti0.9Cr0.1)B2 reinforcement contents systematically varied from 0 to 30 vol.%. Densification behavior analysis revealed that with increasing carbide contents in the reactants, the exothermic reactivity and volumetric shrinkage became more pronounced, facilitating enhanced densification at lower temperatures. Additions of (Ti0.9Cr0.1)B2‐induced significant grain refinement of B4C, the averaged grain size of B4C in B4C‒20 vol.% (Ti0.9Cr0.1)B2 composites (0.71 ± 0.27 µm) is even smaller than those from the raw powders (∼1 µm). B4C with 20 vol.% (Ti0.9Cr0.1)B2 showed balanced mechanical properties including flexural strength of 620.23 ± 20.01 MPa, fracture toughness of 5.50 ± 0.04 MPa m1/2, Vickers hardness (Hv) of 37.72 ± 1.79 GPa, and a specific hardness of 13.01 GPa cm3 g−1. Above enhancement mechanisms were systematically correlated with microstructural characteristics through applications of Griffith's fracture theory. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Lightweight boron carbide (B4C)‐based composites with optimized mechanical properties were consolidated at 1850°C‒1900°C through a combination of carbide boronizing and spark plasma sintering, with (Ti0.9Cr0.1)B2 reinforcement contents systematically varied from 0 to 30 vol.%. Densification behavior analysis revealed that with increasing carbide contents in the reactants, the exothermic reactivity and volumetric shrinkage became more pronounced, facilitating enhanced densification at lower temperatures. Additions of (Ti0.9Cr0.1)B2‐induced significant grain refinement of B4C, the averaged grain size of B4C in B4C‒20 vol.% (Ti0.9Cr0.1)B2 composites (0.71 ± 0.27 µm) is even smaller than those from the raw powders (∼1 µm). B4C with 20 vol.% (Ti0.9Cr0.1)B2 showed balanced mechanical properties including flexural strength of 620.23 ± 20.01 MPa, fracture toughness of 5.50 ± 0.04 MPa m1/2, Vickers hardness (Hv) of 37.72 ± 1.79 GPa, and a specific hardness of 13.01 GPa cm3 g−1. Above enhancement mechanisms were systematically correlated with microstructural characteristics through applications of Griffith's fracture theory. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00027820 |
| DOI: | 10.1111/jace.20658 |
