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您的检索式：作者名="Zhejian ZHANG"
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| 1 | Preparation and anisotropic thermophysical properties of SiC honeycomb/Al-Mg-Si composite via spontaneous infiltration显示文摘The SiC honeycomb/Al-Mg-Si composite with interpenetrated microstructure was prepared by spontaneous infiltration of Al-8 wt%Mg-7 wt%Si alloy into directional porous SiC honeycomb served as reinforcement. The microstructure and anisotropic thermophysical properties of this composite were also examined. The results showed that the initial microstructure of the SiC honeycomb can be retained and the as-prepared SiC honeycomb/Al-Mg-Si composite exhibited significantly anisotropic characteristics. Meanwhile, the alloying treatment on the Al matrix can avoid the generation of Al4C3 and promote the wettability between Al and SiC.Particularly,the directional porous SiC honeycomb with such a low ceramic content(19 vol.%) made it possible for the composite to have a higher thermal conductivity(138.3 W/(m?K)) in the axial direction and a lower coefficient of thermal expansion(11.40 × 10^-6/K) in the radial direction.The influences of the SiC honeycomb reinforcement on the anisotropic thermophysical properties were also studied by the theoretical models in comparing with the experimental results. | Zhejian Zhang Zhongqi Shi Biguo Yang Bangzhi Ge Xiaoyu Zhang Yajie Guo | 2019 | Progress in Natural Science:Materials International2019，29，2： | 3 |
| 2 | Preparation of unidirectional porous AlN ceramics via the combination of freeze casting and combustion synthesis显示文摘Unidirectional porous AlN ceramics(UP-AlNs)have attracted great attention for their wide applications in catalyst supports,filters and composite reinforcements.However,traditional fabrication processes usually require high temperature and long production cycle.Herein,UP-AlNs were successfully fabricated via the combination of tertiary butyl alcohol(TBA)-based freeze casting and combustion synthesis route using Al and AlN powders as raw materials.The microstructure,open porosity,thermal conductivity and compressive strength of UP-AlNs can be manipulated by synergistically regulating the AlN diluent content and Al/AlN solid loading of the freezing slurries.The optimal UP-AlNs exhibited controllable structure wavelength(λ)and open porosity in a wide range of 21.1-47.1μm and 54.2%-86.0%,respectively.In addition,the corresponding products also possessed anisotropic thermal conductivity and compressive strength.This novel route for the fabrication of UP-AlNs has the advantages of low cost,energy-saving and high efficiency,which shows significant promise for industrial applications. | Zhilei Wei Zhejian Zhang Xiaoyu Zhang Zhiyuan Li Tao Li Jiabin Hu Shunjian Xu Zhongqi Shi | 2022 | Journal of Materials Science & Technology2022，，5： | 1 |
| 3 | Unveiling the mechanism of yttrium significantly improving high-temperature oxidation resistance of super-austenitic stainless steel S32654显示文摘Aiming at serious catastrophic oxidation problem of super-austenitic stainless steel S32654,the influence of different rare earth elements on its oxidation behavior was comparatively investigated at 1200℃.The mechanism of Y significantly improving high-temperature oxidation resistance of S32654 was unveiled.The results demonstrated that Y played much better beneficial roles than Ce and La in the initial formation of oxide layer:(1)Y promoted Cr segregation to steel surface to combine with O;(2)its preferential oxidation provided nucleation cores for Cr_(2)O_(3).Both roles jointly promoted the selective oxidation of Cr and then the formation of protective Cr-rich oxide layer.This provided good prerequisites for inhibiting the formation and volatilization of MoO_(3).Additionally,Y cation segregation to oxide grain boundaries further promoted the selective oxidation of Cr and Si to form more protective oxide layer.These beneficial roles of Y essentially eliminated the synergistic effects of MoO_(3) volatilization and lamellar Cr_(2)N precipitation on catastrophic oxidation.Accordingly,the oxidation resistance of Y-bearing S32654 was improved by 22%–45%. | Shucai Zhang Huabing Li Zhouhua Jiang Hao Feng Zhejian Wen Junyu Ren Peide Han | 2022 | Journal of Materials Science & Technology2022，，20： | 0 |
| 4 | Continuous SiC skeleton reinforced highly oriented graphite flake composites with high strength and specific thermal conductivity显示文摘Highly oriented graphite-based composites have attracted great attention because of their high thermal conductivity(TC),but the low mechanical properties caused by the inhomogeneous distribution and discontinuity of reinforcements restrict the wide applications.Herein,continuous SiC ceramic skeleton reinforced highly oriented graphite flake(SiC/GF)composites were successfully prepared by combining vacuum filtration and spark plasma sintering.The effect of SiC concentration on the microstructure,flexural strength,and thermophysical properties of the composites was investigated.The GF grains in the composites exhibited high orientation with a Lotgering factor of>88%when the SiC concentration was≤30 wt%,and the SiC skeleton became continuous with the SiC concentration reaching 20 wt%.The formation of continuous SiC skeleton improved the flexural strength of the composites effectively while keeping the TC in a high level.Especially,the composites with 30 wt%SiC exhibited the flexural strength up to 105 MPa,and the specific TC reaching 0.118 W·m^(2)·K^(−1)·kg-1.The composites with excellent flexural strength and thermophysical properties showed significant promise for thermal management applications. | Xiaoyu ZHANG Wenqi XIE Lan SUN Zhilei WEI Zhejian ZHANG Yuanyuan ZHU Jiabin HU Shenghe WANG Zhongqi SHI | 2022 | Journal of Advanced Ceramics2022，11，3： | 0 |
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