CERAMICS INTERNATIONAL
·
2014
·
IF 2.086
Kuo Jiang,Songbai Liu,Guohua Ma,Lilin Zhao
Dense composite ceramics composing of pyrochlore La 2 Zr 2 O 7 and metastable tetragonal (Zr 0.92 Y 0.08 )O 1.96 phases were synthesized by sol-spray pyrolysis method and were densified by using spark plasma sintering at 1450 °C. The microstructure and mechanical properties of the composites were studied. Microstructure analysis showed that particle size of the La 2 Zr 2 O 7 and (Zr 0.92 Y 0.08 )O 1.96 phases of the composites was in the range of 0.2–1.3 μm. The results of mechanical property measurement revealed that high fracture toughness, almost twice that of single phase La 2 Zr 2 O 7 has been achieved for the La 2 Zr 2 O 7 –(Zr 0.92 Y 0.08 )O 1.96 composite ceramics with 50 mol% 4YSZ addition. The improved toughness was attributed to crack blocking of the (Zr 0.92 Y 0.08 )O 1.96 crystals.
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
JOURNAL OF APPLIED PHYSICS
·
2019
·Vol. 125
·期 22
·
IF 2.328
Zhang Q. K.,Ning S. T.,Qi N.,Chen Z. Q.,Tang X. F.,Chen Z. Y.
In this study, polycrystalline SnSe was synthesized via a rapid, cost-effective, and large-scale synthesis route. The obtained SnSe powders were pressed into pellets via spark plasma sintering (SPS) at different temperatures. Powder X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM) were used to characterize the crystal structures and morphology of the SnSe samples. The XRD results indicate that the orientation factors increase monotonously with the increase of sintering temperature. The FESEM images show that sintering temperatures have no obvious influence on the particle size. Positron annihilation measurements indicate that vacancy defects exist in all the sintered SnSe samples, and they recover gradually with increasing sintering temperatures. These vacancy defects are responsible for the lower lattice thermal conductivity in samples sintered at lower temperatures. The electrical conductivity, power factor, thermal conductivity, and figure of merit ZT show nearly the same variation trend, which increases initially with the increasing sintering temperature up to 550 ° C then decreases with further increase of the sintering temperature, which is possibly due to slight oxidation of SnSe. A maximum ZT value of ∼ 0.47 at 430 ° C was achieved for the 550 ° C sintered sample, which is higher than those reported for undoped polycrystalline SnSe around this temperature. Thus, we provide a simple, energy-saving, and effective method to synthesize polycrystalline SnSe in large quantities, and SPS is an effective method to optimize thermoelectric performance.
研究领域:
材料科学
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能源材料
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yiran Liu,Yimin Ouyang,Linwei Guo,Saidi Wang,Yihui Yang,Bin Du,Tao Zhang
Polymer-derived SiOC ceramics have demonstrated significant potential across various applications, including structure materials, energy, extreme thermal environments, and semiconductors. It is well-established that the carbon phase in SiOC plays a crucial role in determining the material's properties. However, the relationship between carbon phases and the mechanical properties of SiOC ceramics remains inadequately explored. In this study, a series of SiOC nanosphere powders with varying carbon content were successfully fabricated, and bulk samples were obtained using the spark plasma sintering (SPS) technique. The results demonstrate that both carbon content and sintering temperature play a synergistic role in determining the phase composition—such as the formation of SiC through carbothermal reduction—and the microstructural features, including densification and the distribution of free carbon in SiOC ceramics. These structural modifications significantly enhance the mechanical properties through multiple mechanisms. Among all the samples, the SiOC-C ceramics fabricated at 1600°C possess optimized mechanical properties, with a flexural strength of 38.48 MPa. These findings elucidate the potential mechanism for improving the mechanical properties of SiOC ceramics by introducing the carbon phase, which holds significant implications for the development of high-performance ceramic materials.
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
Optical Materials Express
·
2022
·Vol. 12
·期 3
·981-990
·
IF 3.074
Tao Long,Xiaomeng Yin,Hui Lin,Cheng Zou,Dawei Zhang,Songlin Zhuang
Cr3+ doped Ba0.75Al11O17.25 red luminescent phosphors were synthesized and densified into ceramics by spark plasma sintering. Under the 405 nm excitation, the phosphors present a narrow band emission peaked at 704 nm and the highest emission intensity when the doping concentration of Cr3+ is 3%. When the temperature reaches 205 °C, the integrated emission intensity of the red emission can still reach 88% of the counterpart at room temperature, showing good luminescence thermal stability. The thermal conductivity of the ceramics is 4.87 W/(m·K) at room temperature, which is good for heat release under high power/high brightness excitations.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yuchao Fan,Qingyong Tian,Fengmei Guo,Li Ye,Yingjiu Zhang,Xinjian Li
Two-dimensional (2D) Mxene (Ti 3 C 2 T x ) is an emerging reinforcement. Due to its high aspect ratio and abundant surface functional groups, Ti 3 C 2 T x is widely used in polymer matrix composites and metal matrix composites (MMCs). In composites, the strengthening effect of Ti 3 C 2 T x is closely related to its lateral size, which is usually difficult to be controlled macroscopically. In this work, the Ti 3 C 2 T x flakes with two different lateral sizes are prepared by etching Ti 3 AlC 2 powders with different sizes. The lateral size of Ti 3 C 2 T x flakes prepared by etching 400 mesh Ti 3 AlC 2 powders is about 0.67 μm (F1), and that of Ti 3 C 2 T x flakes prepared by etching 200 mesh Ti 3 AlC 2 powders is about 1.83 μm (F2). The F1/ZK61 and F2/ZK61 composites are prepared by spark plasma sintering . The hardness and compressive yield strength (CYS) of the F1/ZK61 composite increased by 16.5% and 8.2%, respectively. The hardness and CYS of the F2/ZK61 composite increased by 7.9% and 5.3%, respectively. This work reveals the effects on mechanical properties by controlling the lateral size of Ti 3 C 2 T x flakes in the Ti 3 C 2 T x /ZK61 composites.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 7
·1-13
·
IF 2.8
Guo Yitong,Du Jingyang,Hu Meihua,Wei Bin,Su Taichao,Zhou Aiguo
In this paper, the thermoelectric (TE) performance of Bi 2 Te 3 was improved by the incorporation of Mo 2 C MXene, which is a novel two-dimensional material with moderate TE performance. The TE properties of Mo 2 C MXene were characterized from bulk samples bonded with 5 wt% Al sintered by spark plasma sintering (SPS) at 623 K for 6 min. Due to the very weak TE performance of Al, the performance of Mo 2 C MXene/Al composite reflects that of Mo 2 C MXene. It is an N-type conductor with the Seebeck coefficient of − 9.25 µV/K at 600 K. This is the first report to characterize the TE performance of Mo 2 C MXene bulk samples. Thereafter, Bi 2 Te 3 /Mo 2 C MXene composite powders were prepared from Mo 2 C MXene powers and precursors of Bi 2 Te 3 by hydrothermal method at 453 K for 24 h. The bulk samples of Bi 2 Te 3 incorporated with Mo 2 C MXene was obtained by SPS at 523 K for 7 min. The composites are N-type conductors. The electrical conductivity was remarkably increased with the content of Mo 2 C MXene, while the thermal conductivity slightly decreased. The sample with 5 vol% Mo 2 C MXene showed the optimal thermoelectric properties, and its ZT value was 0.26 at 473 K. At 450 K, the ZT value (~ 0.25) of that sample was 78.6% higher than that of Bi 2 Te 3 (~ 0.14). This is the first report on regulating TE performance by the incorporation of Mo 2 C MXene, a 2D material with intrinsic TE performance.
研究领域:
材料科学
·
热电材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Chongyang Tao,Lanyun Li,Ni He,Guodong Sun,Chengze Liu,Junjie Xu,Mingyang Li,Longlong Dong,Yusheng Zhang,Lianwen Wang,Mingjia Li
In this study, low energy ball milling and spark plasma sintering techniques prepared the in-situ synthesized Ti 5 Si 3 reinforced Ti-6Al-4V (TC4) matrix composites and then rolled them at high temperatures. In the composites with high Si content, the Ti 5 Si 3 particles distributed at the interface of α-phase and β-phase agglomerated and then formed a quasi-continuous network structure, which will deteriorate the plasticity of the composites. After hot rolling, the grains of the composite were significantly refined, and more Ti 5 Si 3 particles were precipitated. With the increase in Si content, the tensile strength of sintered composites increased slightly, but the elongation decreased greatly. After hot rolling, the tensile strength of the composite increased significantly with an increment of 359.4 MPa, among which the composite with 0.6 wt% Si achieved a synchronous increase in strength and plasticity. The strengthening mechanism of sintered composites included dislocation strengthening, solution strengthening, and grain refinement, among which dislocation strengthening and grain refinement were the main strengthening mechanisms. The strengthening mechanism of rolled composites was mainly the dislocation strengthening caused by rolling, the grain refinement, and the mismatch of thermal expansion coefficient.
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 THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yao Yang,Shuyong Liang,Jianqiang Bi,Hongli Hou,Linjing Qiao,Shushuai Liu,Tao Wang,Hongyu Gong,Zhao Qian,Jinwang Shi,Weiqiang Li
In general, the grains of ceramic materials tend to grow and coarsen with the prolonging of holding time at high temperatures due to grain boundary migration. In this study, high-entropy diboride ceramics composed of (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 were prepared using spark plasma sintering (SPS) at 30 MPa. Notably, grain refinement of the high-entropy diboride ceramics with increased holding times during the SPS process was unexpectedly observed. Specifically, the grain sizes of the (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 were refined from approximately 6 µm (synthesized at 1900°C for 5 min) to around 2 µm (synthesized at 1900°C for 10 min). This intriguing phenomenon is likely attributable to the intrinsic lattice distortion observed in high-entropy ceramics. The introduction of VB 2 was found to significantly enhance lattice distortion, playing a crucial role in the grain refinement of the (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 . Notably, the grain refinement resulted in significant improvements in flexural strength and fracture toughness. This work offers a novel strategy for tailoring the microstructure and mechanical properties of high-entropy ceramics.
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
·
2018
·
IF 3.057
Y.M. Zhou,T. Zhang,K. Xu,F.L. Zhang,K. Bai,H.P. Huang,S.H. Wu,S.M. Luo
Owing to great hardness and low friction coefficients on steel, AlMgB 14 has several potential applications in the fields of cutting tools and wear-resistant materials. In the current work, the effect of Y 2 O 3 addition on the mechanical properties and microstructure of spark plasma sintered AlMgB 14 and AlMgB 14 -TiB 2 has been investigated. An increase in the amount of Y 2 O 3 led to an increase in the number of secondary phases including MgAl 2 O 4 and Y 2 O 3 in AlMgB 14 matrix. The addition of Y 2 O 3 led to a refinement in the grain size of AlMgB 14 and AlMgB 14 -TiB 2 ; however, simultaneously increased the porosity. With the addition of 3 wt% Y 2 O 3 , both AlMgB 14 and AlMgB 14 -TiB 2 reached the finest grain size and the highest hardness while maintaining a low porosity.
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 ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Rongfa Ding,Hui Wang,Yan Jiang,Rui Liu,Ke Jing,Meng Sun,Ruiqian Zhang,Shaoyu Qiu,Zhuoming Xie,Haowei Deng,Xianping Wang,Mingguang Kong,Weibin Jiang,Qianfeng Fang,Changsong Liu
ZrC dispersion-strengthened FeCrAl alloys with enhanced high-temperature strength and good ductility were fabricated through spark plasma sintering (SPS) and hot-forging. Nanosized ZrC particles with an average particle size of 56 nm were homogeneously dispersed in the FeCrAl-ZrC alloys. The addition of a small proportion of ZrC nanoparticles effectively refines the grain size and improves the strength and hardness of FeCrAl alloys. However, the ductility of FeCrAl alloys decreases gradually when the ZrC content increases from 0 wt% to 2.0 wt%. The tensile strength of SPSed FeCrAl-1.0 wt% ZrC alloy at 800 °C is 91 MPa, which is about 69% higher than that of pure FeCrAl, while the percentage elongation after fracture of FeCrAl-1.0 wt% ZrC is 15.0%, which is lower than that of FeCrAl (48.2%). To improve the ductility of FeCrAl-ZrC alloys, the SPSed samples were subjected to hot forging at 1000 °C. Through hot-forging, significant enhancement in ductility of FeCrAl-ZrC alloys was achieved without reducing the strength. The mechanical properties and microstructure of FeCrAl-1.0 wt% ZrC are stable after annealing at 1000 °C for 5 h, exhibiting superior thermal stability as compared with FeCrAl.
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
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yang Liu,Jin-Hao Yuan,Hou-Liang Tian,Wei-Ming Guo,Shi-Kuan Sun,Xiao-Ming Duan,De-Chang Jia,Hua-Tay Lin
Spark plasma sintered SiC-based ceramics with amorphous Y 2 O 3 –Al 2 O 3 –SiO 2 and CaO–Al 2 O 3 sintering additives prepared by melt-quench approach, were compared with those with the direct addition of raw Y 2 O 3 –Al 2 O 3 –SiO 2 and CaO–Al 2 O 3 mixture. The relative densities of SiC-based with raw Y 2 O 3 –Al 2 O 3 –SiO 2 and CaO–Al 2 O 3 were 95.3% and 94.3%, respectively. In spite of the same composition of sintering additive, the relative densities of SiC-based ceramics reached the values of 98.9% and 99.5% by using the glassy additives of Y 2 O 3 –Al 2 O 3 –SiO 2 and CaO–Al 2 O 3 , respectively, and the hardness of SiC-based ceramics was improved by about 22.2% and 17.2%, respectively. The amorphous sintering additive effectively improved the densification and hardness of SiC ceramics.
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
Materials
·
2024
·Vol. 17
·期 19
·4809
·
IF 3.1
Yaqi Zhang,Feng Guo,Huan Zhang,Mingming Zhang,Jianxiu Su,Zhengxin Li
High-conductivity tellurium-based glasses were anticipated to be the attractive candidates in chalcogenide glass systems on account of their distinctive characteristics and extensive application prospects. In this paper, the high-density (>96%) Sn8[(Ga2Te3)34(SnTe)66]92bulk glass with the density of 5.5917 g/cm3was successfully prepared by spark plasma sintering (SPS) technology at 460 K, using a 5 min dwell time and 450 MPa pressure. The room-temperature thermal conductivity of Sn8 bulk materials significantly decreased from 1.476 W m−1∙K−1in the crystalline sample to 0.179 W m−1∙K−1in the glass, and the Seebeck coefficient obviously increased from 35 μV∙K−1in to 286 μV∙K−1, indicating that the glass transition of tellurium-based semiconductors could optimize the thermal conductivity and Seebeck coefficient of the materials. Compared to the conventional tellurium-based glassy systems, the fabricated Sn8 bulk glass presented a high room-temperature conductivity (σ =6.2 S∙m−1) and a large glass transition temperature (Tg=488 K), which was expected to be a promising thermoelectric material.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）