Al-Ni-Er三元体系相平衡研究

被引：0
|
作者：
赵芬妍 [1 ]
章立钢 [1 ]
聂玉崧 [1 ]
缪昊天 [1 ]
刘立斌 [1 ]
机构：
[1] 中南大学材料科学与工程学院
来源：
有色金属科学与工程 | 2021年 / 12卷 / 03期
关键词：
Al-Ni-Er体系; 相平衡; 固溶度; 等温截面; 铝合金;
D O I：
10.13264/j.cnki.ysjskx.2021.03.007
中图分类号：
V252.2 [有色金属（总论）]; TG146.21 [];
学科分类号：
0805 ; 080502 ;
摘要：
高强铝合金具有密度低、强度高、热加工性能好等优点,是航空航天领域的主要结构材料。现代航空航天工业的发展,对高强铝合金的强度和综合性能提出了更高要求。研究和应用双相纳米结构铝合金离不开精确可靠的相图信息。通过X射线衍射(XRD),扫描电子显微镜(SEM)和电子探针显微分析(EPMA/WDS),对Al-Ni-Er三元体系在400℃下的相平衡进行了实验研究。结果表明:(1)在平衡合金样品中发现了新的三元化合物τ-AlNiEr,τ-AlNiEr和τ-AlNiEr;(2)化合物τ,τ,τ,AlNi,AlNi,AlNi,AlEr,ErNi和ErNi具有一定范围的固溶度。400℃时,Ni在AlEr中的固溶度为8.93%(原子分数),Al在ErNi中的固溶度为2.00%(原子分数);(3)CaCu-ErNi是连续固溶体,对Al的最大固溶度为33.33%(原子分数)。
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页码：50 / 62 +76
页数：14
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