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首页> 外文期刊>Metals and Materials International >One Component Metal Oxide Sintering Additive for β-SiC Based on Thermodynamic Calculation and Experimental Observations
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One Component Metal Oxide Sintering Additive for β-SiC Based on Thermodynamic Calculation and Experimental Observations

机译：基于热力学计算和实验观察的β-SiC单组分金属氧化物烧结添加剂

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摘要

is paper examines a range of metal oxides, including those containing relatively safe elements under neutron irradiation, such as Cr, Fe, Ta, Ti, V and W, as well as widely used oxides, Al_2O_3, MgO and Y_2O_3, as a sintering additive for P-SiC theoretically and experimentally. After selecting the most probable SiC oxidation reaction at 1973-2123 K, the condition where the metal oxide additive does not decompose SiC was calculated based on the standard Gibbs formation free energies. Thermodynamic calculations revealed that Al_2O_3, MgO and Y2O3 could be an effective sintering additive without decomposing SiC under hot pressing conditions, which was demonstrated experimentally. On the other hand, no one component metal oxide that contains a safe element for nuclear reactor applications was found to be an effective sintering additive due to the formation of metal carbides and/or silicides. Overall, the simulation based on thermodynamic calculations was found to be quite useful for selecting effective metal oxide additives.
机译：该论文研究了一系列金属氧化物，包括那些在中子辐照下含有相对安全的元素的金属氧化物，例如Cr，Fe，Ta，Ti，V和W，以及广泛使用的氧化物Al_2O_3，MgO和Y_2O_3作为烧结添加剂在理论上和实验上用于P-SiC。在1973-2123 K下选择最可能的SiC氧化反应后，根据标准Gibbs形成自由能计算出金属氧化物添加剂不会分解SiC的条件。热力学计算表明，Al_2O_3，MgO和Y2O3可能是一种有效的烧结添加剂，在热压条件下不会分解SiC，这在实验上得到了证明。另一方面，由于形成金属碳化物和/或硅化物，没有发现包含用于核反应堆应用的安全元素的任何成分的金属氧化物是有效的烧结添加剂。总体而言，发现基于热力学计算的模拟对于选择有效的金属氧化物添加剂非常有用。

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