spiked rare earth element la 外源稀土la
rare-earth element La and Ce 稀土元素La和Ce
rare-earth element la or ce 稀土元素la和ce
The effects of rare earth element La during hydrogenolysis were studied by using SEM, X-ray diffraction and chemical and physical analysis.
通过采用SEM、X射线衍射、化学元素分析、物理分析等技术，系统地研究了稀土镧对氧化钼氢还原的影响。
The results show that rare earth element La helps to improve the microstructure of nitrided layers by way of micro alloying effect which is dependent on its permeation into the nitrided layers.
试验结果表明，含镧的氮化层的韧性和抗冲蚀磨损性能明显优于普通氮化层。
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