【摘 要】
：
Solidification behavior and phase relation of LaFe 13-xSix alloys was investigated using induction melting/arc melting.Phase formation and structure in indu
【出 处】
：
2012 Postdoctoral Symposium of China on Materials Science &a
论文部分内容阅读
Solidification behavior and phase relation of LaFe 13-xSix alloys was investigated using induction melting/arc melting.Phase formation and structure in induction/arc melted LaFel3-xSix alloys has been investigated by means of power X-ray diffraction analysis and scanning electron microscopy.The results have shown that La(Fe,Si)13 (1∶13) phase is a peritectic phase and the solidification behavior and phase relations of LaFe13-xSix alloys are different with Si contents and cooling rate.Under near equilibrium solidification, 1∶13 phase is difficult to formed form the liquid.Composition with low Si contents (x=0.5 to 1.5) consist mainly α-(Fe,Si) phase, whereas those with x=2.0 and x=3.0 are occurred LaFe2Si2 (1∶2∶2) phase and the lamellar eutectic 1∶2∶2 phase plus Fe3 Si phase, respectively.The results were discussed with respect to the effect of cooling rate.
其他文献
In the present study, sub-micrometer LiFePO4 particles with high purity and crystallinity were synthesized using supercritical hydrothermal method as the ca
阴虚不是病,人到一定年纪随着身体的衰老,通常在40岁以后,都会有这种状况。但是如果保养不好,不能适时进补,极有可能造成糖尿病、中风等病症。在现代都市人群中,阴虚到来的时
这也许是一部并不起眼的宝典,但它却给了你一双慧眼,几道“门槛”,让你漫步成才之路,体会成功滋味。光临这里的主角也许很普通,就像你在阳台上晾衣服时,经常望见的邻家孩子。
采訪快結束時,我們懇切地請大媽給我們年輕人說句心裏話。她語重心長地說:“孩子,當你們遇到困難和挫折的時候,一定要相信黨和人民,堅持真理鬥争到底;當你們有了能力和金錢
如果,把每个人的生命都比做一条帆船的话,那么,武威的生命之帆早已在他的童年时代,就被命运的手无情地扯碎了。因此,三十多年来,他活得无比艰难。 也许,坎坷的经历与艺术之
指境观心就是一个很好的概括。那么这个“指”从书法的角度看,可以是纸张的纸,但是泛指艺术的角度,它也可以是指向,指示的指,要始终把你的审美目标和取向定在艺术的境界上面
The purpose of this study was to develop a standard methodology for measuring the surface free energy (SFE), and its component parts of bamboo fiber materia
葡萄虽然可以通过扦插或嫁接等方法进行繁殖,但是,对大面积推广的优良品种,往往因枝条和芽数量的不足及气候不适会造成繁殖系数低,因而常不能满足生产的需要.为了解决这一问
调查发现,25岁～35岁的年轻人虽然在生理上处于最好的状态,但由于要面对太多的选择,他们的心理状态已经过早地进入了“更年期”。恐慌和对自我怀疑让他们患上了青年焦虑症。在
文章使用2015年国家卫生与计划生育委员会的流动人口监测数据,采用二元logistic回归分析,从宏观和微观层面考察影响流动老人获得和利用基本公共健康服务的影响因素.研究结果