JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2025
·
IF 2
Liu Haiyan,Ma Huihuang,Xu Yiqing,Zhou Xiaodong
This study introduces a novel sandwich-structured composite incorporating varying contents of zirconium diboride (ZrB 2 ), with polybenzimidazole (PBI) as the resin matrix and quartz fiber felt (QF) as the reinforcement. The ablative performance of the composites was assessed under high-energy continuous wave laser conditions, featuring a laser power density of 30 MW m -2 , and the laser ablation morphology and ablation mechanism of the ZrB 2 /PBI/QF composites were investigated. Further analysis examined the effects of ZrB 2 ceramic content on the density, thermal stability, mechanical properties, ablation characteristics, and rear surface temperature of the composites. Upon laser ablation, ZrB 2 oxidizes, forming a protective white ZrO 2 layer. At a 60% ZrB 2 content, the rear surface temperature of the composites reached 1031 °C after 42 s, resulting in a low linear ablation rate (0.12 mm s -1 ). The gases and residual carbon produced by the pyrolysis of PBI resin, the melting of QF, and the release of SiO 2 gas contribute to the formation of a SiO 2 protective layer. Building on this foundation, the incorporation of ZrB 2 further enhances energy dissipation and facilitates the development of a ZrO 2 -SiO 2 protective layer with increased reflectivity. This layer, along with another oxidation product, B 2 O 3 gas, serves to isolate oxygen and mitigate erosion. The findings suggest significant potential for developing advanced materials for high-energy continuous wave laser protection.
研究领域:
材料科学
·
热防护系统
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2022
·Vol. 24
·期 12
·1-13
·
IF 2.533
Wang Yu,Li Yao,Yang Xiao-Hui,Zhang Guo-Hua
Nano-Zirconium diboride (ZrB 2 ) powder was vital raw material for manufacturing ultra-high temperature ceramics (UHTCs) and C/C composite materials, which were widely used in extreme environment. In this paper, a convenient way of synthesizing nano-ZrB 2 powder was proposed. Firstly, the precursor consisting of ultrafine-ZrC and C was obtained via vacuum carbothermal reduction of nano-ZrO 2 . And then, the carbothermal reduction product was boronized by B 4 C in Ca melt. In boronation process, Ca melt would play a key role as decarburizer. By boronation reaction at 1373 K and 1473 K, cauliflower-shaped ZrB 2 particle and smooth polyhedral ZrB 2 particle were obtained, respectively. XRD and BET analyses showed that the grain sizes and BET-equivalent particle diameters of these two products were less than 100 nm.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2014
·
IF 3.633
Yicheng Wu,Zhiqiang Yu
The incorporation of highly thermally conductive ceramic materials in polymers could improve effectively the thermal conductivity of polymer matrix . In this work, Zirconium diboride (ZrB 2 ) particles with high thermal conductivity were introduced into an epoxy polymer matrix by in situ synthesis method for the improvement of thermal conductivity of epoxy matrix . The thermal conduction of epoxy composites was investigated by laser flash method and numerical analysis. The dispersive status of the fillers was characterized by transmission electron microscopy (TEM). The results showed that the thermal conductivities of epoxy resin were increased significantly due to the addition of ZrB 2 particles. The thermal conductivity of epoxy composites increases with the increase of ZrB 2 particles loading ranging from 0 wt% to 16 wt%. The enhancement of thermal conductivity exhibited a little change when the particles content exceeded 12 wt%. The influence of the temperature on the improvement of thermal conductivity was inconspicuous. The thermal conductivity of ZrB 2 /epoxy composites increased slightly with the increase of temperatures in the range of 25–100 °C. The distribution of ZrB 2 particles in the matrix affected the thermal conductivities of epoxy composites greatly. In comparison, the composites with 12 wt% ZrB 2 particles loading presented better dispersion of the particles in the epoxy matrix than those of the other composites. The thermal conductivity values of the composites at 12 wt% loading obtained by finite-element analysis (FEA) were in good agreement with the experimental value.
研究领域:
材料科学
·
热传导工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bolin Yang,Changliu Kuang,Zhenglong Liu,Chao Yu,Chengji Deng,Jun Ding,Zhoufu Wang,Shixian Zhao
In order to effectively improve the density and oxidation resistance of ZrB 2 -SiC coating materials, HfB 2 was added into ZrB 2 -SiC system and their physical properties, oxidation resistance were explored. It was observed that the flexural strength of the spark plasma sintered sample with 8 vol% HfB 2 was 717.1 MPa, which was 162.6 % higher than that of the sample without HfB 2 (273.1 MPa). At the same time, the oxidation activation energy of the sample with 15 vol% HfB 2 was increased to 511.98 kJ/mol, showing excellent oxidation resistance. The oxidation process is that HfB 2 and ZrB 2 were oxidized prior to SiC to form HfO 2 and ZrO 2 to form a dense oxide layer on the outermost layer of the sample, and SiC reacted to form a second dense SiO 2 layer to hinder oxygen intrusion. In summary, diboride can achieve the synergistic effect of improving the oxidation resistance and structural optimization of ZrB 2 -SiC-HfB 2 coatings composites, which provides a theoretical basis for its practical application.
研究领域:
材料科学
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高温材料
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
XueYu Tao,ShiXiang Zhou,ZhiMei Xiang,Jie Ma,RuiLin Hou,Yabo Zhu,XianYong Wei
Continuous ceramic nanofibers of ZrB 2 were synthesized via electrospinning combining with polymeric precursor method. The electrospinning solution was prepared from the reaction of Polyzirconoxane (PZO) with 2-Hydroxybenzyl alcohol and boric acid followed by the addition of polyvinylpyrrolidone (PVP). The influences of the solution properties and B/Zr molar ratio on electrospinning were investigated. The electrospun precursors and heat-treated nanofibers were characterized by XRD , SEM, EDS , TEM and Raman. The results showed that pyrolysis at 350 °C helped to stabilize the fibers morphology and ZrB 2 nanofibers were obtained by pyrolyzing the precursor fibers at 1400 °C for 2 h in argon. ZrB 2 nanofibers maintained the excellent fibrous morphology in all the samples. ZrB 2 nanofibers are composed of uniformly nanosized ZrB 2 particles. The average crystallite size of ZrB 2 particles using Scherrer equation is 25 nm. The atomic percentages of zirconium and boron in the product formed in argon at 1400 °C were 17.06% and 33.73% respectively, which is very close to the stoichiometric ZrB 2 .
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2012
·
IF 2.353
Xinghong Zhang,Yang Hou,Ping Hu,Changqing Hong
This paper has systematically investigated the dispersion behavior of ZrB 2 nanopowders in n-butanol solution and the adsorption mechanism of gallic acid on ZrB 2 . Gallic acid was found to be effective as a dispersant, which could provide stabilization of ZrB 2 particles in the suspension. The stability of ZrB 2 suspension and the adsorption amount of gallic acid were increased with increasing of gallic acid content (up to 6 wt%), and the pH value did not need to be adjusted. The results of Fourier transform infrared spectroscopy (FTIR) measurement and computer simulation revealed that the adsorption of gallic acid involved the interaction of two adjacent OH groups with Zr ions on the particle surfaces and complexation, which formed mononuclear chelate through a Zr atom binding to O atoms at position 3 and 4, or binuclear chelate by two Zr atoms replacing H atoms at position 4 and 5.
研究领域:
材料科学
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表面化学
✓ 已验证
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2021
·Vol. 29
·期 3
·521-528
·
IF 2.232
Wang Yu,Zhang Guohua,Chou Kuochih
ZrC and ZrB 2 are both typical ultra-high temperature ceramics, which can be used in the hyperthermal environment. In this study, a method for preparing ultrafine ZrC-ZrB 2 composite powder was provided, by using the raw materials of nano ZrO 2 , carbon black, B 4 C, and metallic Ca. It is worth pointing out that ZrC-ZrB 2 composite powder with any proportion of ZrC to ZrB 2 could be synthesized by this method. Firstly, a mixture of ZrC and C was prepared by carbothermal reduction of ZrO 2 . By adjusting the addition amount of B 4 C, ZrC was boronized by B 4 C to generate ZrC-ZrB 2 composite powder with different compositions. Using this method, five composite powders with different molar ratios of ZrC and ZrB 2 (100ZrC, 75ZrC-25ZrB 2 , 50ZrC-50ZrB 2 , 25ZrC-75ZrB 2 , and 100ZrB 2 ) were prepared. When the temperature of boronization and decarburization process was 1473 K, the particle size of product was only tens of nanometres. Finally, the oxidation characteristics of different composite powders were investigated through oxidation experiments. The oxidation resistance of ZrC-ZrB 2 composite powder continued to increase as the content of ZrB 2 increased.
研究领域:
材料科学
·
陶瓷
·
高温材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Jianjie Hao,Jiayan Li,Binglin Zou,Xiaolong Cai,Wei Shi,Yi Tan
ZrB 2 -SiC-Al 2 O 3 (ZSA) and ZrB 2 -SiC-Si (ZSS) coatings were prepared on the surface of C/C composites by atmospheric plasma spraying . During oxidation at 1200 ℃ for 10 h, the formation of B 2 O 3 in the ZSA coating volatilizes gradually, no glass phase is able to seal cracks and holes, resulting in poor oxidation resistance . On the other hand, the ZSS coating produces a large amount of borosilicate glass phase and still gains 0.8% weight after 10 h. During oxidation at 1500 ℃, a low viscosity SiO 2 glass phase forms on the ZSA coating, due to the presence of Al 2 O 3 and this glassy phase has a good ability to seal defects. However, the rapid volatilization of B 2 O 3 in the ZSS coating leads to the formation of large holes in the coating, and to progressively increased viscosity of SiO 2 glass phase, resulting in decreased oxidation resistance.
研究领域:
材料科学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2018
·Vol. 126
·期 7
·504-509
·
IF 0.887
Zhiwu JIANG,Peizhong FENG,Xiaohong WANG,Hanzhu ZHANG,Yanan LIU
MoSi2–ZrB2–SiC ceramics were synthesized using Mo, Zr, Si and B4C powders by self-propagating high-temperature synthesis and densifying by spark plasma sintering. The effects of MoSi2 content on the combustion synthesis process, microstructure, and mechanical properties of the ceramics were investigated. The results showed that combustion synthesis is an unstable mode, spiral combustion. The Gibbs calculations and combustion temperature curves indicate there are two reactions occurring at the same time. The volume fraction of the four different phases and their relative densities were also measured and calculated. Compared to pure MoSi2, the 1.0MoSi2–0.2ZrB2–0.1SiC (M10) ceramic exhibits excellent mechanical properties with its maximum Vickers hardness and fracture toughness being 14.0 GPa and of 5.5 MPa m1/2, respectively. The hardness is in agreement with the rule of mixture. The morphology of indentation cracks reveals that the fracture toughness improves as a result of toughening mechanisms such as crack bridge, crack deflection, and microcracks.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2017
·
IF 4.727
Yicheng Wu,Zhiqiang Yu,Xiaoyan Liu
The tribological performance of in-situ epoxy composites reinforced with micro-sized particles of zirconium diboride (ZrB 2 ) were investigated in dry sliding conditions. The frictional heat flow in the contact areas was analyzed using finite element modeling . It was found that the dominant wear mechanisms of composites were changed from adhesive wear to abrasive wear due to the introduction of ZrB 2 particles under the imposed sliding conditions. The coefficient of friction (CoF) and coefficient of wear K of composites decreased significantly with the increase of ZrB 2 particle content. The increase in thermal conductivity due to the addition of ZrB 2 particles was proposed to contribute to the enhanced wear resistance under given sliding conditions.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Qiang Gao,Ping Hu,Yuxuan Xia,Yuan Cheng,Guangdong Zhao,Jiaxin Feng,Zibin Chen,Xinghong Zhang
Ultra-high temperature ceramic composites (UHTCCs) with low density and exceptional heat resistance are essential for hypersonic vehicle applications, enabling increased payload capacity and higher Mach numbers. However, developing a fabrication process that enables UHTCCs with both lightweight and superior thermal protection performance is still a challenge. To tackle this problem, in this study, a combinatorial process of vibration-assisted slurry impregnation and polymer infiltration pyrolysis was developed to fabricate gradient lightweight C f /ZrB 2 -SiC composites, consisting of continuous carbon fiber fabric, ZrB 2 -SiC and a carbon aerogels (CAs) layer. The resulting composites exhibit a low density of (0.62–0.96 g cm −3 ) but excellent oxidation and ablation resistance, which can withstand ultrahigh temperatures between 2100 °C and 2500 °C. The porous C f /CAs layer, with a density of 0.38 g cm −3 and specific bending and compressive strengths of 43.47 MPa/(g cm −3 ) and 15.53 MPa/(g cm −3 ), respectively, provides both structural integrity and lightweight properties to the C f /ZrB 2 -SiC composite. Furthermore, the density of the composites can be precisely tailored by adjusting the thickness of the C f /ZrB 2 -SiC layer, allowing for customized fabrication to meet diverse service environment requirements. This flexibility highlights the adaptability of the combined processing techniques. The unique combination of controllable low-density properties and exceptional oxidation and ablation resistance endows gradient lightweight C f /ZrB 2 -SiC composites are promising as lightweight, ultra-high temperature thermal protection systems for hypersonic vehicle applications.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yingjun Liu,Jianjun Sha,Cheng Su,Jixiang Dai,Yufei Zu
Sintering additive of ZrSi 2 is beneficial to low-temperature densification of ZrB 2 -based ultra-high temperature ceramics (UHTCs), nevertheless, residual ZrSi 2 would severely reduce the high-temperature strength of UHTCs. In the current work, to achieve low-temperature preparation of ZrB 2 -based UHTCs with good high-temperature strength, active carbon (C) was added into ZrB 2 –ZrSi 2 ceramics to convert the sintering additive into refractory phases of SiC/ZrC. C-doped ZrB 2 –ZrSi 2 powders were hot-pressed at different temperatures to investigate the phase composition, microstructure and densification behavior. TG-DSC, XRD and SEM results indicated that ZrSi 2 was almost entirely converted into SiC and ZrC at 1600 °C for 2h, meanwhile, a fully-dense C-doped ZrB 2 –ZrSi 2 ceramic was obtained at such sintering conditions. In addition, the high-temperature (1800 °C) strength of C-doped ZrB 2 –ZrSi 2 ceramic was 390 ± 21 MPa, which was much higher than that of the C-undoped one. The excellent high-temperature mechanical properties could be attributed to the transformation of low-melting-point phases into refractory phases.
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
危险品化学品经营许可证（带存储）