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首页> 外文期刊>Ceramic Engineering and Science Proceedings >EVALUATION OF OXIDATION PROTECTION TESTING METHODS ON ULTRA-HIGH TEMPERATURE CERAMIC COATINGS FOR CARBON-CARBON OXIDATION RESISTANCE
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EVALUATION OF OXIDATION PROTECTION TESTING METHODS ON ULTRA-HIGH TEMPERATURE CERAMIC COATINGS FOR CARBON-CARBON OXIDATION RESISTANCE

机译:耐高温碳陶瓷耐高温氧化陶瓷涂层氧化防护测试方法的评价

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摘要

The development of carbon-carbon (C-C) composites for aerospace applications has prompted the need for ways to improve the poor oxidation resistance of these materials. In order to evaluate and test materials to be used as thermal protection system (TPS) material the need for readily available and reliable testing methods are critical to the success of materials development efforts. With the purpose to evaluate TPS materials, three testing methods were used to assess materials at high temperatures (> 2000 ℃) and heat flux in excess of 200 Wcm{sup}(-2). The first two methods are located at the National Solar Thermal Test Facility (NSTTF) at Sandia National Laboratories, which are the Solar Furnace Facility and the Solar Tower Facility. The third method is an oxyacetylene torch set up according to ASTM E285-80 with oxidizing flame control and maximum achievable temperatures in excess of 2000 ℃. In this study, liquid precursors to ultra high temperature ceramics (UHTCs) have been developed into multilayer coatings on C-C composites and evaluated using the oxidation testing methods. The tests will be discussed in detail and correlated with preliminary materials evaluation results with the aim of presenting an understanding of the testing environment on the materials evaluated for oxidation resistance.
机译:用于航空航天应用的碳-碳(C-C)复合材料的发展促使人们需要改善这些材料较差的抗氧化性的方法。为了评估和测试用作热保护系统(TPS)材料的材料,对易于开发和可靠的测试方法的需求对于材料开发工作的成功至关重要。为了评估TPS材料,采用了三种测试方法对高温(> 2000℃)和热通量超过200 Wcm {sup}(-2)的材料进行评估。前两种方法位于桑迪亚国家实验室的国家太阳能热测试设施(NSTTF)中,分别是太阳能炉设施和太阳能塔设施。第三种方法是根据ASTM E285-80设置的氧乙炔炬,具有氧化火焰控制功能,最高可达到2000℃以上的温度。在这项研究中,超高温陶瓷(UHTC)的液体前体已被开发为C-C复合材料上的多层涂层,并使用氧化测试方法进行了评估。将对测试进行详细讨论,并将其与初步的材料评估结果相关联,以呈现对评估为抗氧化性的材料的测试环境的理解。

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