... 磷的作用(effect ofphosphorus) 稀土元素的作用(effect ofrare earth) 腐蚀?维护corrosion?protection) ...
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研究了不同含硫量和不同冷却速度下铈、镧和钕对铸铁石墨形态和基体组织的影响。试验表明，不同的稀土元素在铸铁中的行为是不一样的。同时，硫和冷却速度对稀土元素的作用有重要的影响。
In this paper, effects of Ce, La and nd on graphite morphology and matrix structure in cast iron with various sulphur content and under various cooling rate have been studied.
了解和掌握含稀土材料的摩擦学特性及稀土元素在其中的作用机制具有重要的意义。
It is important to understand the tribological characteristics of rare earth materials and the role of rare earth element.
研究表明玄武岩首先风化形成蒙皂石族粘土矿物，在此过程中稀土元素没有明显的分馏作用，强风化的玄武岩重稀土元素强烈亏损；
It is concluded that the half-weathered basalts have not distinct REE fractionation and strong weathered basalts had HREE loss in the process of the basalts weathered to form smectite family minerals.
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