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| 铜基大块非晶合金的临界冷速与组织形貌变化 | |
| 引用本文： | 杨英俊,邢大伟,孙剑飞,魏思东,沈军.铜基大块非晶合金的临界冷速与组织形貌变化[J].稀有金属材料与工程,2007,36(2):236-240. |
| 作者姓名： | 杨英俊 邢大伟 孙剑飞 魏思东 沈军 |
| 作者单位： | 1. 哈尔滨工业大学,黑龙江,哈尔滨,150001;空军航空大学,吉林,长春,130022 2. 哈尔滨工业大学,黑龙江,哈尔滨,150001 3. 空军航空大学,吉林,长春,130022 |
| 摘 要： | 制备了具有良好玻璃形成能力的Cu52.5Ti30Zr11.5Ni6大块非晶合金，其临界直径达到5mm，临界冷却速率约为126．8K／s。采用Jackson-Hunt公式计算了晶化组织形成的冷却速率。当冷却速率在10K／s-120K／s时，晶化组织则出现亚稳初生相与共晶共存的形态。当冷却速率低于10K／s时，亚稳初生相的析出将被逐渐抑制，使得共晶生长方式发生改变。 |
| 关 键 词： | 铜基大块非晶合金 临界冷却速率 共晶组织 |
| 文章编号： | 1002-185X(2007)02-0236-05 |
| 修稿时间： | 2005-12-06 |
Critical Cooling Rate and Microstructure Evolution of Cu-Based Bulk Amorphous Alloy |
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| Yang Yingjun,Xing Dawei,Sun Jianfei,Wei Sidong,Shen Jun.Critical Cooling Rate and Microstructure Evolution of Cu-Based Bulk Amorphous Alloy[J].Rare Metal Materials and Engineering,2007,36(2):236-240. | |
| Authors: | Yang Yingjun Xing Dawei Sun Jianfei Wei Sidong Shen Jun |
| Affiliation: | 1. Harbin Institute of Technology, Harbin 150001, China;2. Aviation University of Air Force, Changehun 130022, China |
| Abstract: | Bulk amorphous Cu52.5Ti30Zr11.5Ni6(at.%) alloys up to 5 mm in diameter were fabricated by a copper mold casting method.The critical cooling rate was determined to be 126.8 K/s by using the Barandiaran-Colmenero expression.Based upon the Jackson-Hunt relation,the cooling rate for the formation of devitrified structure was also evaluated.In the cooling range of 10 K/s ~ 120 K/s,there exists a mixed microstructure of primary metastable phase and eutectic structure.With further decreasing of cooling rate(below 10K/s),the precipitation of metastable phase was depressed,and the growth mode also deviates from the eutectic mode. |
| Keywords: | Cu-Based bulk amorphous alloy critical cooling rate eutectic microstructure |
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