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spontaneous infiltration and wetting behaviors of a Zr-based alloy melt on a porous SiC substrate

International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 817-823页

作者： Zhang Wen Li Hong Li Hai-feng Zhang School of Materials Science and Engineering Shenyang Aerospace UniversityShenyang 110136China School of Materials Science and Engineering Shenyang Ligong UniversityShenyang 110159China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The spontaaleous infiltration aald wetting behaviors of a Zr-based alloy melt on porous a SiC ceramic plate were studied using tile sessile drop metilod by continuous heating and holding for 1800 s at different temperatures in a high-vacuum furnace. The results showed that tile Zr-based alloy melt could pastly infiltrate tile porous SiC substrate without pressure due to tile effect of capillary pressure. Wettability and infiltration rates increased witil increasing temperature, and interracial reaction products （ZrC0.7 and TiC） were detected in tile Zr-based alloy/SiC ceramic system, likely because of tile reaction of tile active elements Zr and Ti witil elemental C. Furtilelinore, tile redundant ele- ment Si diffused into tile alloy melt.

关键词： spontaneous infiltration wetting interface porous SiC Zr-based alloy

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Preparation and anisotropic thermophysical properties of SiC honeycomb/Al-Mg-Si composite via spontaneous infiltration

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Progress in Natural Science:Materials International 2019年第2期29卷 177-183页

作者： Zhejian Zhang Zhongqi Shi Biguo Yang Bangzhi Ge Xiaoyu Zhang Yajie Guo State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Engineering Research Center of Transportation Materials of Ministry of Education School of Materials Science and Engineering Chang'an University

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 Al;C;and promote the wettability between Al and ***,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;/K) in the radial *** influences of the SiC honeycomb reinforcement on the anisotropic thermophysical properties were also studied by the theoretical models in comparing with the experimental results.

关键词： SiC honeycomb Al-Mg-Si alloy spontaneous infiltration Anisotropy Thermophysical properties

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Reactive spontaneous infiltration of Al-activated TiO_2 by molten aluminum

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Transactions of Nonferrous Metals Society of China 2019年第3期29卷 657-666页

作者： Abdollah SABOORI Xiang CHEN Claudio BADINI Paolo FINO Matteo PAVESE Department of Applied Science and Technology Politecnico di TorinoCorso Duca Degli Abruzzi 24 10129 Torino Italy Research Center of Graphene Applications Beijing Institute of Aeronautical Materials Beijing 100095 China

The reactive spontaneous infiltration of Al-activated TiO2 (anatase) was investigated. Pure Al powder was blended with TiO2 for activation. They were compacted into the preform and then sealed within 6060 alloy mould. The activation and infiltration were carried out in 6060 alloy bath for 1 h and comparative sintering experiments were carried out in an argon protected environment under the same conditions of temperature and duration. X-ray diffraction analysis proved that the Al sealed environment was superior to the argon protection on activating the reaction between Al and TiO2. The blending ratio of TiO2 to Al and the temperature were found to play the most important role in infiltration by affecting infiltration and reaction kinetics. Three main types of microstructures were observed after infiltration: full infiltration, partial infiltration with the formation of cracks and no infiltration. The formation of these microstructures was explained on the basis of reaction kinetics and local volume changes due to the reactions. Ultimately, it is found that to obtain an overall good spontaneous infiltration, a TiO2 to Al blending ratio around 3:7 in volume and an infiltration temperature around 900 °C are the most suitable.

关键词： spontaneous infiltration pressureless sintering TiO2-Al reaction infiltration kinetics in-situ fabrication

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infiltration Process of Molten Aluminum by Spreading Wetting to Aluminum Borate Whisker Preform

Infiltration Process of Molten Aluminum by Spreading Wetting...

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第十三届国际复合材料会议

作者： MakotoYOSHIDA HiroakiDATE JinPAN GenSASAKI HideharuFUKUNAGA Dept. of Mechanical Engineering Hiroshima Univeasity 739-8527 Japan Nobuyuki FUYAMA Toshio FUJII Western Hiroshima Prefecture Industrial Research Institute 737-0005 Japan Dept. of Mechanical Engineering Hiroshima Univeasity 739-8527 Japan Nobuyuki FUYAMA Toshio FUJII Western Hiroshima Prefecture Industrial Research Institute 737-0005 Japan Dept. of Mechanical Engineering Hiroshima Univeasity 739-8527 Japan Nobuyuki FUYAMA Toshio FUJII Western Hiroshima Prefecture Industrial Research Institute 737-0005 Japan Dept. of Mechanical Engineering Hiroshima Univeasity 739-8527 Japan Nobuyuki FUYAMA Toshio FUJII Western Hiroshima Prefecture Industrial Research Institute 737-0005 Japan Dept. of Mechanical Engineering Hiroshima Univeasity 739-8527 Japan Nobuyuki FUYAMA Toshio FUJII Western Hiroshima Prefecture Industrial Research Institute 737-0005 Japan

＜正＞Introduction In order to fabricate MMCs, high pressure die casting process, so-called "squeeze casting" has been used to infiltrate molten aluminum to the prefom made with ceramics whisker. It was inevitable to apply high pressure to molten alloy because of insufficiency of wettability to the ceramics. However, the investment in the equipment and machining processing result in inclease in the cost of products, and this must be one of reasons to prevent the MMCs from wide use to machine parts. Recent yeats, to solve these problems, spontaneous infiltration process which enable us to fabricate net-shape MMCs, such as "PRIMEX" has been

关键词： MMC wettability spontaneous infiltration aluminum borate

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