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不同冷却条件下Cu_(60)Co_(30)Cr_(10)合金的快速凝固(英文) 被引量：2

Rapid solidification of Cu_(60)Co_(30)Cr_(10) alloy under different conditions
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摘要 利用电磁悬浮和快淬实验研究Cu60Co30Cr10合金在亚稳不混溶区的液相分离和快速凝固特征。结果表明,合金的显微组织为富(Co,Cr)相分布在富Cu相基体中,且富(Co,Cr)相颗粒的形状和大小随着冷却速率的变化而有明显的区别。在悬浮凝固条件下冷却速率较低,富(Co,Cr)相较粗大,有明显的聚集粗化趋势,富(Cu)相中有大量富(Co,Cr)相枝晶。而在快淬凝固条件下富(Co,Cr)相明显细化,富(Cu)相中未发现富(Co,Cr)相枝晶形成,这可能与较高的冷却速率、较大的过冷度和较高的界面张力有关。 Metastable liquid phase separation and rapid solidification in a metastable miscibility gap were investigated on the Cu60Co30Cr10 alloy by using the electromagnetic levitation and splat-quenching.It is found that the alloy generally has a microstructure consisting of a（Co,Cr）-rich phase embedded in a Cu-rich matrix,and the morphology and size of the（Co,Cr）-rich phase vary drastically with cooling rate.During the electromagnetic levitation solidification processing the cooling rate is lower,resulting in an obvious coalescence tendency of the（Co,Cr）-rich spheroids.The（Co,Cr）-rich phase shows dendrites and coarse spheroids at lower cooling rates.In the splat quenched samples the（Co,Cr）-rich phase spheres were refined significantly and no dendrites were observed.This is probably due to the higher cooling rate,undercooling and interface tension.
作者 郭晋波 曹崇德 弓素莲 宋瑞波 白晓军 王建元 郑建邦 文喜星 孙占波
机构地区 西北工业大学应用物理系空间应用物理与化学教育部重点实验室 西安交通大学物质非平衡合成与调控教育部重点实验室
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第3期731-734,共4页 中国有色金属学报（英文版）
基金 Projects(51171152,50871088) supported by the National Natural Science Foundation of China Project(20126102110048) supported by Doctoral Fund of Ministry of Education of China Project(SKLSP201202) supported by Foundation of State Key Laboratory of Solidification,China Project(2012JC2-02) supported by Natural Science Basic Research Plan in Shaanxi Province,China Project (JC201268) supported by the NPU Foundation for Fundamental Research,China
关键词 Cu-Co-Cr合金 快速凝固 亚稳液相分离 电磁悬浮 快淬 Cu-Co-Cr alloy rapid solidification metastable liquid phase separation electromagnetic levitation splat-quenching
分类号 TG156.1 [金属学及工艺—热处理]
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参考文献18

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共引文献3

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  • 3WANG Rui, WANG Shao-feng, YAO Yin, LIU Li-li, WU Xiao-zhi. The temperature-dependent elastic properties of B2-MgRE intermetallic compounds from first principles[J]. Physica B: Condensed Matter, 2012, 407(1): 96-102.
  • 4GONZ,LEZ E, JASEN P, MARCHETTI J M, BRIZUELA G, JUAN A. Density functional and bonding study of hydrogen and platinum adsorption on B2-FeTi (111) slab[J]. International Journal of Hydrogen Energy, 2012, 37(3): 2661-2668.
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  • 6CAO Zhao-ping, LIU Shu-hong, FANG Xu, CHENG Kai-ming, GAO Qian-nan, DU Yong, WANG Jiong, ZHANG Jun, HUANG Wei-dong, TANG Cheng-ying. Experimental investigation and thermodynamic analysis of the Sc-Ni system supplemented with first-principles calculations[J]. Thermochimica Acta, 2014, 586(8): 30-39.
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Transactions of Nonferrous Metals Society of China
2013年 第3期

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