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Nd-Fe-B三元系相图的研究 Ⅱ.过Nd_2Fe_(14)B点的等硼和等Nd垂直剖面相图

PHASE DIAGRAM OF Nd-Fe-B TERNARY SYSTEM II. TWO VERTICAL SECTIONS WITH CONSTANT Nd AND B RESPECTIVELY, PASSING THROUGH Nd_2Fe_(14)B POINT
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摘要 根据差热分析测量的相变点和铸态样品的金相观察及微区成分分析,绘制了通过Nd_2Fe_(14)B正分点的等硼(B=5.88at.-%,Nd≤45.41at.-%)与等钕(Nd_2Fe_(14)B-Nd_(1.1)Fe_4B_4)两个三元垂直剖面相图。证明合金液相冷却时,四方结构的Nd_2Fe_(14)B和Nd_(1.1)Fe_4B_4是经包晶反应析出的,而不是固液同成分析出。 According to the experimental date of phase transition taken fromDTA, metallography, SBM and microzone composition analysis, two vertical sectionsof the ternary phase diagram (B=5.88 at.-%, Nd≤45.41 at.-% and Nd_2Fe_(14)B-Nd_(1.1)Fe_4B_4, B≤44.56 at.-%) have been drawn in detail. It is verified that crystallizationof both Nd_2Fe_(14)B and Nd_(1.1)Fe_4B_4 phase, during cooling from melt, would take pe-ritectic reaction instead of solid-liquid congruent precipitation.
作者 张宁 罗阳
出处 《金属学报》 SCIE EI CAS CSCD 北大核心 1989年第2期B109-B115,共7页 Acta Metallurgica Sinica
关键词 Nd-Fe-B系 合金 相图 垂直剖面 Nd-Fe-B phase diagram vertical section
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