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首页> 外文会议>Mechanical properties and performance of engineering ceramics and composites IX >ENHANCEMENT OF OXIDATION RESISTANCE OF GRAPHITE FOAMS BY SIC COATING FOR CONCENTRATED SOLAR POWER APPLICATIONS
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ENHANCEMENT OF OXIDATION RESISTANCE OF GRAPHITE FOAMS BY SIC COATING FOR CONCENTRATED SOLAR POWER APPLICATIONS

机译：集中太阳能应用的SIC涂层增强石墨泡沫的抗氧化性

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Graphite foam has been considered to improve thermal performance of latent heat thermal energy storage system for concentrated solar power (CSP) plant. However, poor oxidation resistance of graphite-based materials at high temperature limits the use of graphite foam for these elevated temperature applications. Method to enhance oxidation resistance of graphite foams was investigated in this study. Chemical vapor reaction (CVR) approach was utilized for the coating of foams. Afterwards, the samples were analyzed using SEM/EDS. Furthermore, X-ray diffraction was performed to verify the phases present in all of the coated samples. Oxidation resistance of uncoated graphite foam and SiC coated graphite foam were investigated by measuring weight changes with increasing exposure time at various elevated temperatures. Oxidation experiments were conducted under two conditions: flowing and static argon atmosphere in a furnace. After the experiments, weight loss rates (%/hour) were calculated. It was shown that SiC coating can significantly improve the oxidation resistance of the graphite foam under static argon atmosphere with both high vacuum and low vacuum conditions.
机译：石墨泡沫已被认为可以改善集中式太阳能发电厂（CSP）的潜热储热系统的热性能。但是，石墨基材料在高温下较差的抗氧化性限制了石墨泡沫在这些高温应用中的使用。本研究研究了增强石墨泡沫抗氧化性的方法。化学气相反应（CVR）方法用于泡沫涂料。然后，使用SEM / EDS分析样品。此外，进行X射线衍射以验证所有涂覆样品中存在的相。通过测量在各种高温下随着暴露时间增加的重量变化，研究了未涂覆的石墨泡沫和SiC涂覆的石墨泡沫的抗氧化性。在两个条件下进行氧化实验：炉中的流动氩气和静态氩气。实验后，计算体重减轻率（％/小时）。结果表明，在高真空和低真空条件下，SiC涂层都能显着提高在静态氩气气氛下石墨泡沫的抗氧化性。

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