EPMA and TEM characterization of intergranular tellurium corrosion of Ni-16Mo-7Cr-4Fe superalloy
EPMA and TEM characterization of intergranular tellurium corrosion of Ni-16Mo-7Cr-4Fe superalloy
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Ni-16Mo-7Cr-4Fe高温合金晶间碲腐蚀的EPMA和TEM表征
DOI：
10.1016/j.corsci.2015.04.017
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发表时间：
2015
影响因子：
8.3
通讯作者：
Zhou Xingtai
中科院分区：
文献类型：
--
作者：
Cheng Hongwei;Leng Bin;Chen Kai;Jia Yanyan;Dong Jiasheng;Li Zhijun;Zhou Xingtai
研究了Ni-16 Mo-7 Cr-4Fe合金在800 °C碲蒸气气氛中的腐蚀行为。Te被确定通过电子探针显微分析在晶界区域的腐蚀合金。这些地区的形态，化学成分和晶体结构的特征在于在透射电子显微镜。在晶界和晶间碳化物-基体界面处均观察到碲化铬。在此基础上，讨论了Te晶间腐蚀的机理及其与晶间开裂的可能关系。
The corrosion behavior of a Ni–16Mo–7Cr–4Fe alloy was investigated in a tellurium (Te) vapor atmosphere at 800 °C. Te was identified via electron probe microanalysis at the grain boundary regions of the corroded alloy. The morphology, chemical composition, and crystalline structure of those areas were characterized in a transmission electron microscope. Chromium tellurides were observed at both grain boundaries and intergranular carbide–matrix interfaces. Based on the results, the mechanism of intergranular Te corrosion and its possible correlation with intergranular cracking is discussed.