COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Wenjie Zhu,Yujie Wang,Yuwei Ren,Minghang Li,Yichun Bi,Ce Zheng,Xiaoqiang Li
High-purity Ti 3 SiC 2 MAX phase was introduced into the Amosic 3-303 SiC fiber-reinforced SiC matrix composite as a modified matrix by Reaction Melt Infiltration (RMI) at 1250 °C, realizing the generation of high-purity Ti 3 SiC 2 phase without residual melt and by-products in the RMI matrix. This modification reduced the porosity of the SiC f /SiC-Ti 3 SiC 2 composite from 10 to 20% typically found in SiC f /SiC composite prepared by Chemical Vapor Infiltration (CVI) to 6%, and the densification process cycle time by 70%. The flexural strength and thermal conductivity were enhanced by 12% and 58%, respectively. The microstructure and phase evolution of Ti 3 SiC 2 in the SiC f /SiC composite matrix was systematically investigated, offering new insights into the ceramic matrix growth process during RMI. This work proposes a new method for utilizing the RMI process to prepare high-performance nuclear SiC f /SiC-based composites.
研究领域:
材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Mian Yang,Kaihua Chen,Shenghui Guo,Ming Hou,Jiyun Gao,Junwen Zhou,Shuhao Shi,Li Yang
In this paper, the self-propagating reaction of the Ti–SiC–C system for synthesising Ti 3 SiC 2 -based diamond composites is ignited by the combustion of Ni–Al alloy powders in a microwave field. The heating curves of Ni–Al-assisted microwave sintering show that the self-propagating reaction could be successfully ignited after heating samples to 685.2 °C in a microwave field for 456 s. This finding indicates that ignition could occur at temperatures below the diamond graphitisation temperature (727 °C). X-ray diffraction analysis indicates that the sintered samples primarily comprise Ti 3 SiC 2 , TiC, Ti 5 Si 3 and C. Scanning electron microscopy coupled with energy dispersive spectroscopy observations demonstrates that the diamond grains are tightly bonded with the surrounding matrix and are intact. The best wear ratio of 302.26 was obtained for the Ti 3 SiC 2 -bonded diamond composite when the diamond grain size was 140/170 mesh and the molar ratio of Ti, SiC and C was 3:1.1:0.9.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhaoxin Zhong,Biao Zhang,Jian Ye,Ye Gao,Qiang Liu,Zhiguo Zhang,Feng Ye
Porous SiC ceramics have recently attracted wide attention for their applications in the electrically heatable filter. Further improvement of the thermal and electrical conductivity without sacrificing permeability is a critical parameter for such applications. In the present work, porous SiC/Ti 3 SiC 2 ceramic composites with Ti 3 SiC 2 and micro/nano SiC have been prepared from TiC/Si/α-SiC mixtures at a low sintering temperature (1400 °C). Nano-laminated Ti 3 SiC 2 enhanced the electrical conductivity , while the good thermal conductivity was achieved through in-situ formed nano β-SiC and raw coarse α-SiC in the porous ceramics . Along with the increase of initial α-SiC particle size from 0.76 to 16.13 μm, the permeability, thermal and electrical conductivity improved due to the decreased porosity and increased pore size in porous SiC/Ti 3 SiC 2 ceramics. The results suggested that the decoupling of the electrical conductivity from the thermal conductivity could be tuned by adjusting the initial α-SiC particle size.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Qi Song,Zhao-Hui Zhang,Zheng-Yang Hu,Shi-Pan Yin,Hao Wang,Zhen-Wu Ma
B 4 C ceramics were fabricated by spark plasma sintering with 5% (Ti 3 SiC 2 +Si) as sintering aid. The effects of sintering temperatures and sintering aid on microstructures and properties of B 4 C ceramics were investigated. The results indicated that the addition of a small amount of (Ti 3 SiC 2 +Si) could effectively improve the sintering characteristic of B 4 C ceramics and reduce the sintering temperature. The as-sintered ceramics fabricated at 1700 °C exhibited excellent mechanical properties , including a super-high Vickers hardness of 38.4 GPa, a high flexural strength of 457.6 MPa and a good fracture toughness of 5.61 MPa m 0.5 . Following reasons may be responsible for the improvement of the hardness of B 4 C ceramics: high relative density due to the combination use of (Ti 3 SiC 2 +Si) sintering aids and SPS technology, fine-grained structure of the B 4 C ceramics benefited from the low sintering temperature, formation of the second phases TiB 2 and SiC by chemical reaction and existence of the nano-sized unit of (TiB 2 +SiC) in B 4 C grains.
研究领域:
材料科学
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陶瓷工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 20
·1629
·
IF 4.4
Penghui Lei,Qing Chang,Mingkun Xiao,Chao Ye,Pan Qi,Fangjie Shi,Yuhua Hang,Qianwu Li,Qing Peng
A new type of SiCf/TiC-Ti3SiC2composite was prepared by the Spark Plasma Sintering (SPS) method in this work. The phase transformation and interface cracking of this composite under ion irradiation (single Xe, Xe + He, and Xe + He + H ions) and subsequent annealing were analyzed using transmission electron microscopy (TEM), mainly focusing on the interface regions. Xe ion irradiation resulted in the formation of high-density stacking faults in the TiC coatings and the complete amorphization of SiC fibers. The implanted H ions exacerbated interface coarsening. After annealing at 900 °C for 2 h, the interface in the Xe + He + H ion-irradiated samples was seriously damaged, resulting in the formation of large bubbles and cracks. This damage occurred because the H atoms reduced the surface free energy, thereby promoting the nucleation and growth of bubbles. Due to the absorption effect of the SiCf/TiC interface on defects, the SiC fiber areas near the interface recovered back to the initial nano-polycrystalline structure after annealing.
研究领域:
材料科学
·
核材料
·
复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zetan Liu,Jingkun Xu,Xiaoqing Xi,Weijia Luo,Ji Zhou
Since the synthesis of non-oxidized ceramic and alloy powders requires both high temperature and oxygen insulation conditions, here we demonstrate a cost-efficient molten salt sealing/shielded synthesis method with dynamic gas tightness. Compared to conventional synthesis method, it can prevent the loss of reaction materials at high temperature, cut off the connection between reacting material and outside air, and does not require long-time ball milling mixing treatment or provision of applied pressing before or during heating. Only low-cost salts (e.g., NaCl, KCl), a few minutes of raw material mixing, and regular heating molds are required to obtain high-purity (>96 wt%), micron-sized Ti 3 AlC 2 and Ti 3 SiC 2 powders with narrow size distribution, which significantly decreased the complexity and production costs in the synthesis process. The effect of temperature and raw material content on the products were investigated. The mechanism of diffusion reaction between reactants in molten salt environment was analyzed. The new method developed here was also applicable to Ti 2 AlC, V 2 AlC and Cr 2 AlC MAX phases, as well as provided new ideas for the preparation of other MXenes precursors with certain stoichiometric ratios, air-sensitive materials and nanopowders .
研究领域:
材料科学
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化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2013
·Vol. 11
·期 5
·911-918
·
IF 1.153
Qian Wang,Chunfeng Hu,Shu Cai,Yoshio Sakka,Salvatore Grasso,Qing Huang
High-purity ternary laminated compound Ti 3 SiC 2 was successfully synthesized by a microwave heating method in the flowing argon for the first time. The mixtures of titanium, silicon, and graphitic carbon (C gc ) or activated carbon (C ac ) with different molar ratios were used to investigate the reaction mechanisms. It was confirmed that Ti 3 SiC 2 with high purity of 98 vol.% was achieved without the aids of Al. The optimum experimental parameters were determined as Ti/Si/C gc having the molar ratio of 3/2.2/2, first holding at 1480°C for 30 min, and subsequent dwelling at 1300°C for 60 min.
研究领域:
材料科学
·
陶瓷
·
粉末冶金
✓ 已验证
DOI
高影响因子
Materials Today Sustainability
·
2023
·
IF 7.8
Y. Jia,K. Wang,C. Li,S. Liu
Piezocatalysis, a new catalysis technology much relying on catalyst's piezoelectric property , attracts unprecedented research enthusiasm for applications in energy conversion and chemical synthesis, such as hydrogen peroxide production. However, the reported piezocatalytic activities are not ideal and one of the reasons is the unsatisfactory piezoelectricity , urging researchers to explore new and efficient piezocatalysts. Herein, the MAX phase materials (Ti 3 AlC 2 , Ti 3 AlCN, and Ti 3 SiC 2 ) are employed as piezocatalysts for hydrogen peroxide (H 2 O 2 ) and reactive oxygen species generation. Results suggest that Ti 3 SiC 2 possesses the highest piezocatalytic activity with a notable H 2 O 2 yield of 871.0 μmol/g/h accompanied with small amount of reactive oxygen species, while the Ti 3 AlC 2 and Ti 3 AlCN deliver relatively lower H 2 O 2 yields of 810.6 and 835.6 μmol/g/h in pure water, respectively. A series of characterizations and analysis have been employed to understand the insights of piezocatalytic activity difference and reaction mechanism. The enhanced peizocatalytic activity of Ti 3 SiC 2 can be traced to its notable piezoelectric property and reduced electronic transfer resistance as well as the improved free charge density, all of which are favorable factors benefiting the piezocatalytic H 2 O 2 generation. Moreover, H 2 O 2 production via piezocatalysis stems from both oxygen reduction and water oxidation .
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2025
·Vol. 40
·期 6
·1563-1571
·
IF 1.1
Cao Wenjing,Liu Yiming,Zhao Dongmei,Wan Xiaobo,Liu Yang,Huang Kun,Shi Minxian
A Ti 3 SiC 2 -modified high-silica oxygen/phenolic aerogel composite with excellent oxidation resistance and high-temperature performance was prepared. The experimental results show that the obtained composite has significantly improved oxidation resistance. When the addition amount of Ti 3 SiC 2 is 75%, the carbonization volume shrinkage rate of the composite after aerobic static combustion is only 5.95%. At the same time, the LAR and MAR after 30 seconds of oxyacetylene ablation under a heat flux density of 1.5 MW/m 2 are 0.0307 mm/s and 0.0149 g/s, respectively. The compressive strength after aerobic static combustion at 1 000 °C is up to 20.43% of that before aerobic static combustion, which is 1.99 times that of the unfilled material, significantly improving the high-temperature mechanical properties of the composite.
研究领域:
材料科学
·
航空航天工程
·
陶瓷基复合材料
·
热防护系统
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2019
·
IF 4.081
Qi Wang,Guo-qing Chen,Kang Wang,Xue-song Fu,Wen-long Zhou
TiAl intermetallic was direct diffusion bonded to Ti 3 SiC 2 at 900 °C, 950 °C, and 1000 °C with a holding time ranging from 0.25 h to 64 h. The interfacial microstructural evolution , the growth kinetics and the mechanical properties of the bonded TiAl/Ti 3 SiC 2 joints were systematically investigated. The build-up of interfacial compounds in the TiAl/Ti 3 SiC 2 joints changed from γ+α 2 /γ/Ti 5 Si 3 /Ti 3 SiC 2 to γ+α 2 /γ/TiAl 2 /Ti 5 Si 3 /Ti 3 SiC 2 , to γ+α 2 /γ/TiAl 2 /Ti 5 Si 4 /Ti 5 Si 3 /Ti 3 SiC 2 , and to γ+α 2 /γ/TiAl 2 /TiAl 3 +Ti 5 Si 3 /Ti 5 Si 4 /Ti 5 Si 3 /Ti 3 SiC 2 as the holding time or bonding temperature increased. The formation sequence of interfacial phase at the joint was: Ti 5 Si 3 →Ti 5 Si 4 →TiAl 2 →TiAl 3 . The de-intercalation Si atoms from the Ti 3 SiC 2 diffusing into the TiAl base alloy and reacting with the Ti was responsible for the formation of the interfacial reaction layers. The thicknesses of the interfacial reaction layers grew following the parabolic kinetic law, indicated their growth was controlled by the bulk diffusion . The bonding activation energy was 213 kJ/mol. The joint, bonded at 900 °C for 9 h, had the highest shear strength (about 53 MPa) with a γ+α 2 /γ/TiAl 2 /Ti 5 Si 4 /Ti 5 Si 3 /Ti 3 SiC 2 interfacial microstructure and with a total thickness of 6 μm.
研究领域:
材料科学
·
金属间化合物
·
连接技术
·
扩散动力学
·
微观结构分析
✓ 已验证
DOI
高影响因子
ACS Nano
·
2017
·
IF 13.942
Guodong Zou,Qingrui Zhang,Carlos Fernandez,Gang Huang,Jianyu Huang,Qiuming Peng
Rational design of heterogeneous electrode materials with hierarchical architecture is a potential approach to significantly improve their energy densities. Herein, we report a tailored microwave-assisted synthetic strategy to create heterogeneous hierarchical Ti3SiC2@C-containing Na2Ti7O15 (MAX@C-NTO) composites as potential anode materials for high-performance sodium storage in a wide temperature range from 25 to 80 °C. This composite delivers first reversible capacities of 230 mAh g–1 at 200 mA g–1 and 149 mAh g–1 at 3000 mA g–1 at 25 °C. A high capacity of ∼93 mAh g–1 without any apparent decay even after more than 10 000 cycles is obtained at an ultrahigh current density of 10 000 mA g–1. Moreover, both a high reversible capacity and an ultralong durable stability are achieved below 60 °C for the same composites, wherein a 75.2% capacity retention (∼120 mAh g–1 at 10 000 mA g–1) is achieved after 3000 cycles at 60 °C. To the best of our knowledge, both the sodium storage performances and the temperature tolerances outperform those of all the Ti-based sodium storage materials reported so far. The superior sodium storage performances of the as-synthesized composites are attributed to the heterogeneous core–shell architecture, which not only provides fast kinetics by high pseudocapacitance but also prolongs cycling life by preventing particle agglomeration and facilitates the transportation of electrons and sodium ions by large micro/mesopore structure.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 49
·期 16
·26428-26439
·
IF 5.2
Kai Su,Xuekun Tian,Suping Li,Junyan Cui,Xinhong Liu,Bo Song
Using low-cost and highly reactive bamboo charcoal, Ti and Si elemental powders as starting materials, Ti 3 SiC 2 powder was synthesized via a simple and cost-efficient pressureless sintering technique in argon atmosphere. The influences of synthesis temperature, holding time and Si content on the Ti 3 SiC 2 content of the synthesized products were investigated, and the analysis indicated that the relative content of Ti 3 SiC 2 reached 98.9 wt% with a molar ratio of 3Ti/1.2Si/2.2C at 1400 °C for 1.5 h. The Ti 3 SiC 2 with good crystallinity and homogeneous nanolayered structure was synthesized at lower temperatures due to the high reactivity and high specific surface area of bamboo charcoal. The non-isothermal oxidation behavior showed that Ti 3 SiC 2 powder was stable in air below 540 °C. With the temperature increasing up to 1300 °C, continuous and dense TiO 2 and SiO 2 oxidation layers were formed on the surface of Ti 3 SiC 2 particles, which conferred good oxidation resistance to Ti 3 SiC 2 powder.
研究领域:
材料科学
·
陶瓷学
·
固态化学
·
高温材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）