Ni-Ag偏晶合金凝固过程研究

被引：1

作者：

赵雷

赵九洲

机构：

[1] 中国科学院金属研究所

来源：

金属学报 | 2012年 / 48卷 / 11期

关键词：

Ni-Ag偏晶合金; 液-液相变; 快速凝固; 喷铸; 模拟;

D O I：

暂无

中图分类号：

TG131 [合金学理论];

学科分类号：

摘要：

对Ni-Ag偏晶合金开展了喷铸快速凝固实验,获得了富Ag相粒子弥散分布于Ni基体相的复合凝固组织.建立了Ni-Ag偏晶合金喷铸快速凝固过程中组织演变的动力学模型,模拟分析了喷铸Ni-Ag合金凝固组织形成过程.结果表明:在喷铸快速凝固条件下,Ni-Ag合金液-液相变过程中富Ag相液滴的Ostwald粗化作用很弱,初生富Ag相粒子的弥散度主要由液-液相变过程中富Ag相液滴形核率决定,初生富Ag相粒子的数量密度和平均半径与液-液相变过程中富Ag相液滴形核阶段熔体冷却速率间满足N∝(?)和∝(?)的指数关系.

引用

页码：1381 / 1386

页数：6

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