Journal of the Korean Ceramic Society
·
2024
·
IF 2.7
Wang Zikang,Qian Miao,Shao Geyu,Xu Yuzhen,Song Qi
In this study, spark plasma sintering technology was used for fabricating B 4 C composite ceramics that contained 30 wt% (TiB 2 + SiC) by altering the sintering pressures (0 MPa, 50 MPa, and 80 MPa) at a comparatively low temperature of 1650 °C. This study showed how sintering pressure affected the densification behavior, microstructures, and mechanical characteristics of composite ceramics. Elevating the sintering pressure led to the inhibition of grain growth during the sintering process, ultimately resulting in the refinement of grains within the composite ceramics. At the same time, the quantity of internal pores in the composite ceramics was reduced, and the relative densities increased, so the flexural strength and hardness of the composite ceramics could be effectively improved. The quantity of microcracks and large aspect ratio second phase particles decreased with an increase in sintering pressure, which adversely affected the fracture resistance characteristics of the composite ceramics. In addition, the growth of B 4 C grains was hindered by TiB 2 and SiC generated by in-situ reactions, thus improving the mechanical characteristics of the composite ceramics. Comprehensive analysis showed that the composite ceramics had the best comprehensive mechanical properties when the sintering pressure was 80 MPa, displaying a relative density of 98.65%, a Vickers hardness of 30.71 GPa, a flexural strength of 531.19 MPa, and a fracture toughness of 5.78 MPa m 1/2 .
研究领域:
材料科学
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陶瓷工程
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Aiyang Wang,Qianglong He,Wenchao Guo,Chun Liu,Tian Tian,Lanxin Hu,Lisheng Liu,Weimin Wang,Zhengyi Fu
B 4 C ceramics were strengthened by introducing the hard second–phase particles TiB 2 and SiC, and the effects of TiB 2 and SiC contents on the microstructure and properties of the composites were investigated. B 4 C–TiB 2 binary composites with TiB 2 contents of 10, 20, 30, and 40 vol% were prepared by hot pressing. The microstructure, mechanical properties, and electrical properties of the composites with different TiB 2 contents were investigated and compared. The results showed that the B 4 C–30 vol%TiB 2 composite obtained the best comprehensive properties, with a relative density, hardness, bending strength , fracture toughness , and conductivity of 97.9 %, 29.5 GPa, 590 MPa, 6.41 MPa m 1/2 , and 7.6 × 10 4 S/m. The compressive stress generated on B 4 C, crack deflection induced by TiB 2 , and conductive network formed by TiB 2 are of great significance in the context of the properties of the B 4 C–TiB 2 composites. In addition, B 4 C–TiB 2 –SiC ternary composites with SiC contents of 0, 10, and 20 vol% were also fabricated by hot pressing. The effect of SiC content on the microstructure and mechanical properties, and the effect of SiC on the antioxidant properties of the composites were investigated. The results showed that the B 4 C–30 vol%TiB 2 –10 vol%SiC composite had the best comprehensive properties, with a relative density, hardness, flexural strength, fracture toughness, and residual flexural strength (1600 ℃) of 98.8 %, 29.5 GPa, 621 MPa, 6.80 MPa m 1/2 , and 465 MPa. The inhibition of the growth of SiC to other grains, removal of oxide impurities, and repair of damage by SiC oxidation products play an important role in the performance of the B 4 C–TiB 2 –SiC composites.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 8
·1021
·
IF 2.9
Tao Jiang,Junjie Xu,Chuntao Ge,Jie Pang,Jun Zhang,Geir Martin Haarberg,Saijun Xiao
Molten salt electrophoretic deposition is a novel method for preparing coatings of transition metal borides such as TiB2, which has emerged in recent years. To broaden the applications of transition metal boride coatings prepared by this method, this paper investigates the corrosion resistance of TiB2coatings, produced through molten salt electrophoretic deposition, to liquid zinc. By applying a cell voltage of 1.2 V (corresponding to an electric field of 0.6 V/cm) for 1 h in molten NaF-AlF3, the nanoscale TiB2particles migrated to the cathode and were deposited on the graphite substrate, forming a smooth and dense TiB2coating with a thickness of 43 μm. Subsequently, after subjecting the TiB2-coated graphite to corrosion resistance tested in molten zinc for 120 h of continuous immersion, no cracks were observed on the surface or within the coating. The produced TiB2coating demonstrated excellent corrosion resistance. These research results suggest that the fully dense TiB2coating on the graphite substrate, produced through molten salt electrophoretic deposition, exhibits excellent corrosion resistance to liquid zinc.
研究领域:
材料科学
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腐蚀与防护
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2018
·Vol. 126
·期 11
·900-905
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IF 0.887
Shuai LU,Xiaoqiang LI,Youfu ZHOU,Wentao XU,Junrong LING,Wei PAN
TiB2/Ti2AlN composites with different proportions were successfully fabricated through solid state reaction of Ti/Al/AlN/BN powders and subsequent hot pressing sintering. The reaction mechanism, microstructures and mechanical properties of the composites were investigated. The Vickers hardness of the samples ascended with increases in the TiB2 content and reached the highest value of 11.32 ± 0.12 GPa at a TiB2/Ti2AlN mole ratio of 1:2 (M2T1). TiB2/Ti2AlN composites with a mole ratio of 1:3 (M3T1) and 1:4 (M4T1) exhibited the maximum flexural strength of 497 ± 15 MPa and the highest fracture toughness of 9.52 ± 0.14 MPa·m1/2, respectively, which are 1.3 times and 1.8 times that of pure Ti2AlN (MT0) ceramic.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Guoqiang Luo,Peng Fan,Kejia Kang,Rong Tu,Jian Zhang,Yi Sun,Qiang Shen,Lianmeng Zhang
AlB 12 -AlB 12 C 2 -TiB 2 -based hard and tough composites were fabricated using ball milled B, Al, and Ti powders as the starting materials, and sintered by reactive plasma activated sintering (PAS). The mechanical properties and microstructures were investigated, and the effects of the composition and microstructures on the reinforcing and toughening of the composites were determined. The results showed that the composite with 10 vol% TiB 2 showed excellent mechanical properties, a lightweight of 2.76 g cm −3 , Vickers hardness of 37 GPa, and fracture toughness of 7.1 MPa m 1/2 . In addition, the main strengthening and toughening mechanisms were due to the twin structures, dislocation defects, and stacking faults in the specimen in addition to grain pull-out, crack deflection, crack bridging, and crack branching caused by elongated TiB 2 particles.
研究领域:
材料科学
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机械工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2018
·
IF 3.794
Qianglong He,Aiyang Wang,Chun Liu,Weimin Wang,Hao Wang,Zhengyi Fu
B 4 C-TiB 2 -SiC composites were fabricated via hot pressing using ball milled B 4 C, TiB 2 , and SiC powder mixtures as the starting materials. The impact of ball milling on the densification behaviors, mechanical properties , and microstructures of the ceramic composites were investigated. The results showed that the refinement of the powder mixtures and the removal of the oxide impurities played an important role in the improvement of densification and properties. Moreover, the formation of the liquid phases during the sintering was deemed beneficial for densification. The typical values of relative density, hardness, bending strength , and fracture toughness of the composites reached 99.20%, 32.84 GPa, 858 MPa and 8.21 MPa m 1/2 , respectively. Crack deflection, crack bridging, crack branching, and microcracking were considered to be the potential toughening mechanisms in the composites. Furthermore, numerous nano-sized intergranular/intragranular phases and twin structures were observed in the B 4 C-TiB 2 -SiC composite.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Xin Liu,Jiahua Pei,Minjing Liu,Zhi Wang,Lixin Liu,Li Jing,Zhanjun Wu
In the present work, the powder mixtures of TiB 2 containing 2.0mol.% carbon black with trace La 2 O 3 and Al 2 O 3 are used to fabricate textured TiB 2 ceramic using hot–pressing at 1800 °C, and then the TiB 2 ceramic is hot–forged. The results of microstructural observation indicated that the addition of the powder mixtures of Al 2 O 3 and La 2 O 3 was favorable to the rearrangement of the anisotropic TiB 2 grains, whereas was unfavorable to the improvement of the relative density during hot–pressing and hot–forging. The flexural strength and the fracture toughness of textured TiB 2 ceramic fabricated using the combination of oxides and hot–forging were improved significantly, whereas hardness did not show obvious change. The results here pointed to a novel method for fabricating textured TiB 2 –based ceramics.
研究领域:
材料科学
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力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Xiaorong Zhang,Zhixiao Zhang,Yuming Liu,Aiyang Wang,Shi Tian,Weimin Wang,John Wang
In this work, we systematically studied the effects of powder characteristics (B 4 C, TiC and Si powders) on the existential form of toughening phases (SiC and TiB 2 ) as well as the overall microstructure and properties of B 4 C–TiB 2 –SiC composites fabricated by reactive hot pressing. The particle size of the TiC powder plays a largely determining role in the development of novel toughening phases, the TiB 2 –SiC composite structure, that are formed in the B 4 C matrix, while the Si particle size affects the agglomerate level of the SiC phase. The TiB 2 –SiC composite structure and SiC agglomerates enhance the fracture toughness, but decrease the flexural strength . Both the microstructure and mechanical properties of B 4 C–TiB 2 –SiC composites can be effectively tuned by regulating the combinations of the particle sizes of the starting powders. The B 4 C–TiB 2 –SiC composites demonstrate flexural strength, fracture toughness and Vickers hardness in the respective range of 567–632 MPa, 5.11–6.38 MPa m 1/2 , and 34.8–35.6 GPa.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Qianglong He,Jingjing Xie,Aiyang Wang,Chun Liu,Tian Tian,Lanxin Hu,Chenhong Yi,Zhixiao Zhang,Hao Wang,Weimin Wang,Zhengyi Fu
B x C-TiB 2 -SiC ceramic composites were fabricated via reactive hot pressing using TiC, B, and Si as the raw materials. The phase transition process was studied by heating powder mixtures to different temperatures in combination with X-ray diffraction analysis. The stoichiometric ratio between B and C in boron carbide is variable. A series of powder mixtures containing excess boron (0 wt%, 10 wt%, 20 wt%, or 30 wt% B) were sintered, and the microstructures and mechanical properties of the composites were investigated. The results showed that the B 6.1 C-TiB 2 -SiC composite prepared from the starting powders with 30 wt% excess boron had the best comprehensive mechanical properties , with a relative density, hardness, bending strength , and fracture toughness of 98.32%, 33.2 GPa, 840 MPa, and 5.22 MPa m 1/2 , respectively. Excessive boron substitution may cause lattice distortion in boron carbide , and the boron carbide grains in this state may form a large number of twins under the compressive stress generated by the TiB 2 grains, which will affect the properties of the composites.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2023
·Vol. 20
·期 6
·3635-3646
·
IF 2.1
Haopeng Cai,Yinglong Wei,Baoguo Wang,Kun Jiang
It is necessary to give self-healing function to ceramic materials because of their notch sensitivity. In the past, studies on self-healing ceramics have mainly focused on the high-temperature stage, and less research has been done below 1000°C. In this study, SiC/Al 2 O 3 /TiB 2 ceramic composites were prepared by spark plasma discharge sintering, and cracks were introduced on the surface of the polished specimens. Crack healing at 600°C–800°C was investigated, and the recovery of macroscopic bending strength and the change of microscopic crack morphology after heat treatment were used to evaluate the crack-healing effect. It was found that the surface cracks of the material were completely filled and healed by oxidation products after heat treatment at 700°C for 60 min, and the highest healing efficiency exceeded 95% for both specimens with different crack lengths, and the main mechanism of crack by Si-Al-B-Na-Ca-O type glass produced by the reaction of TiB2 and a small amount of SiC with oxygen to produce oxides and glass powder. Good healing effect and fast healing speed effectively improve the service life and reliability of ceramic materials, which has very far-reaching significance for the practical application with ceramic materials.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2021
·Vol. 35
·期 6
·1031-1037
·
IF 0.957
Cao Yaoqin,He Qianglong,Wang Weimin
B 4 C-TiB 2 -SiC composites with excellent properties were prepared by reactive hot-pressing using B 4 C, TiC, and Si powders as the raw materials. The phase transition process was investigated by heating the powder mixture to different temperatures and combined with XRD tests. TiB 2 and SiC phases were synthesized through an in situ reaction, and the mechanical and thermal properties were improved simultaneously. Microstructure and mechanical properties were also studied, and the 60wt% B 4 C-21.6wt% TiB 2 -18.4wt% SiC composite showed a relative density of 99.1%, Vickers hardness of 34.6 GPa, flexural strength of 582 MPa, and fracture toughness of 5.08 MPa·m 1/2 . In addition, the values of thermal conductivity and thermal expansion coefficient were investigated, respectively.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Qi Song,Zhao-Hui Zhang
As a kind of structural ceramic , ultrahigh hardness B 4 C ceramics are sensitive to flaws, especially surface flaws , which cause mechanical property degradation. The present study intended to achieve flaw self-healing with the pre-oxidation treatment method at 1073 K for 15–60 min, which effectively improved the flexural strength of the B 4 C– TiB 2 – SiC composite ceramic. The changes in surface morphology and flexural strength over pre-oxidation time were studied in detail, and schematic diagrams of pre-oxidation strengthening process were systematically proposed. The research results indicated that the pre-oxidation treatment could heal pores and cracks because glassy oxide B 2 O 3 , which has a low melting point, could flow and fill flaws on composite ceramic surfaces efficiently and, in turn, significantly improve mechanical performance. The flexural strength of the composite ceramic reached a maximum of 684 MPa at the optimum pre-oxidation time of 45 min, which was an increase of 28.77% compared with that of the untreated composite ceramic. Further increasing the pre-oxidation time resulted in a decrease in flexural strength due to pores forming on surfaces again, which was induced by the production of more CO gas and the intensive evaporation of the B 2 O 3 glass phase.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）