Degradation of rhenium carbide obtained by mechanochemical synthesis at oxygen and moisture environmental conditions
Degradation of rhenium carbide obtained by mechanochemical synthesis at oxygen and moisture environmental conditions
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DOI：
10.1016/j.matchemphys.2019.02.088
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发表时间：
2019-05
影响因子：
4.6
通讯作者：
M. G. Granados-Fitch;J. M. Quintana-Melgoza;E. Juarez-Arellano;M. Avalos-Borja
中科院分区：
文献类型：
--
作者：
M. G. Granados-Fitch;J. M. Quintana-Melgoza;E. Juarez-Arellano;M. Avalos-Borja
本文对机械合成的碳化铼（Re2C）进行了SEM、HRTEM和XRD表征。为了了解Re2C在氧气和水分环境下的化学稳定性，我们将Re2C储存了2个月、12个月、27个月和54个月。贮存54个月后的结果表明，Re2C部分降解为ReO3， WC-Co完全降解为H2WO4、W18O49、CoO和c。最后，提出了Re2C和WC-Co在氧气和水分环境下的降解示意图，并通过热力学分析进行了部分验证。
In this paper, rhenium carbide (Re2C) synthesized by mechanosynthesis was characterized by SEM and HRTEM, as well as XRD. The Re2C was stored at oxygen and moisture environmental conditions in order to know the chemical stability for 2, 12, 27 and 54 months. The results of storage after 54 months indicate that Re2C is partially degraded into ReO3, while WC-Co milling material is totally degraded into H2WO4, W18O49,CoO and C. Finally, a schematic diagram of the degradation of Re2C and WC-Co at oxygen and moisture environmental conditions is proposed and partially validated by thermodynamic analysis.