Improvement of “pest” oxidation resistance of Nb-Mo-W-Zr solid- solution alloy at 800 °C by gas nitridation
Improvement of “pest” oxidation resistance of Nb-Mo-W-Zr solid- solution alloy at 800 °C by gas nitridation
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DOI：
10.1016/j.corsci.2021.109513
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发表时间：
2021-04
影响因子：
8.3
通讯作者：
Yun Li;B. Gan;Z. Bi;H. Yu;Chungen Zhou;J. Sha
中科院分区：
文献类型：
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作者：
Yun Li;B. Gan;Z. Bi;H. Yu;Chungen Zhou;J. Sha
采用气体氮化技术在Nb-5 W-2 Mo-1 Zr合金上制备了氮化层。氮化层由（Nb，Me）4 N3和（Nb，Me）2N氮化物组成的外层和由（Nb，Me）2N和NbSS相组成的层状类共晶团（LEC）界面组成。在800°C下氧化100 h后，渗氮合金的氧化动力学曲线呈抛物线型，其抗氧化性能优于裸合金。讨论了氮化物层抑制（Nb，W）xOyoxide层“害虫”和剥落的机制。
Nitride layer was prepared on an Nb-5W-2Mo-1Zr by gas nitridation technique. The nitride layer was composed of an outer layer of (Nb, Me)4N3and (Nb, Me)2N nitrides and an inner lamellar eutectoid-like colony (LEC) interface consisting of (Nb, Me)2N and NbSSphases. The nitrided alloy showed parabolic oxidation kinetics curve with better oxidation resistance than that of the bare alloy when oxidized at 800°C for 100 h. The mechanisms for the nitride layer to suppress the “pest” and spallation of (Nb,W)xOyoxide layer were discussed.