首页|La-Fe-B三元合金体系的垂直截面相图

La-Fe-B三元合金体系的垂直截面相图

Vertical section phase diagrams of La-Fe-B ternary system

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采用电子探针显微分析和差热分析研究La-Fe-B体系的垂直截面.根据铸态合金和平衡合金的显微组织和相组成及其热流-温度曲线,绘制3个垂直截面相图:LaxFe82By(x+y=18)、LaxFe70By(x+y=30)和LaxFe53By(x+y=47)(x和y分别为La和B的质量分数,％).此外,根据相图,化合物La2Fe14B被确定为高温稳定相.该化合物在926.2～792.6℃范围内稳定存在,低温下分解为α-La、α-Fe和LaFe4B4,其反应方式为La2Fe14B→α-Fe+α-La+LaFe4B4.
The vertical sections of the La-Fe-B system were investigated using electron probe microanalysis and differential thermal analysis. Based on the microstructures and phase compositions of the as-cast and equilibrium alloys, together with their heat flow-temperature curves, phase diagrams for three vertical sections were drawn: LaxFe82By (x+y=18), LaxFe70By (x+y=30) and LaxFe53By (x+y=47), where x and y represent mass fraction of La and B, respectively,％. Additionally, according to the phase diagrams, the compound La2Fe14B was identified as a stable phase at high temperatures. It was found to be stable between 926.2 and 792.6 ℃; at low temperatures, however, it decomposed intoα-La,α-Fe and LaFe4B4, according to the reaction La2Fe14B→α-Fe+α-La+LaFe4B4.

solidification characteristicsvertical section phase diagramequilibrium alloyhigh temperature stable compound

韦奇、卢照、姚青荣、邓建秋、王江、周怀营、饶光辉

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桂林电子科技大学 材料科学与工程学院 广西信息材料重点实验室,桂林541004

广西大学 物理科学与工程技术学院,南宁 530004

广西有色金属及特色材料加工重点实验室,南宁 530004

凝固特征 垂直截面相图 平衡合金 高温稳定化合物

This work was financially supported by the Natural Science Foundation of ChinaGuangxi Natural Science Foundation,ChinaGuangxi Natural Science Foundation,ChinaGuangxi Natural Science Foundation,ChinaGuangxi Natural Science Foundation,ChinaGuangxi Project of Science and Technology,ChinaGuangxi Project of Science and Technology,ChinaScientific Research Foundation of Guilin University of Electronic Technology,ChinaGuangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsChina,the Guangxi Key Laboratory of Information Materials,ChinaNational Key R&D Program of Chinaauthors thank the financial support from the foundation for Guangxi Bagui scholars,China

517610072019GXNSFAA2450032018GXNSFAA2940692020GXNSFFA2970042021GXNSFDA075009AD19110078AA18242023-1UF180162019-GXYSOF08191012-Z2016YFB0700901

2021

10.1016/S1003-6326(21)65613-3

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(6)
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