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| Zr_(47)Cu_(44)Al_9大块非晶合金的变温晶化行为 | |
| 引用本文： | 张宝庆,曹国华,战再吉,刘日平,王文魁.Zr_(47)Cu_(44)Al_9大块非晶合金的变温晶化行为[J].材料热处理学报,2009,30(6). |
| 作者姓名： | 张宝庆 曹国华 战再吉 刘日平 王文魁 |
| 作者单位： | 1. 河南理工大学材料科学与工程学院,河南,焦作,454000;燕山大学亚稳材料制备技术与科学国家重点实验室,河北,秦皇岛,066004 2. 河南理工大学物理化学学院,河南,焦作,454000 3. 燕山大学亚稳材料制备技术与科学国家重点实验室,河北,秦皇岛,066004 |
| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划) |
| 摘 要： | 利用示差扫描量热仪(DSC)研究了Zr_(47) Cu_(44)Al_9大块非晶合金在连续升温过程中的的变温晶化行为.利用Kissinger方法计算其特征温度表观激活能,利用Doyle方法计算其局域激活能.结果表明,Zr_(47) Cu_(44)Al_9大块非晶合金具有良好的热稳定性.利用Kissinger方法计算得到的其玻璃转变激活能E_g为390.2kJ/mol、晶化激活能E_x为325.1kJ/mol、晶化峰值的激活能E_p为299.5kJ/mol.随着加热速率的提高,各特征温度值向高温端移动,其晶化峰值温度所对应的晶化体积分数减小.局域激活能随着非晶晶化体积分数的增加而逐渐减小. |
| 关 键 词： | 大块非晶合金 变温晶化 晶化动力学 晶化激活能 |
Crystallization kinetics of Zr_(47) Cu_(44)Al_9 bulk metallic glass |
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| ZHANG Bao-qing,CAO Guo-hua,ZHAN Zai-ji,LIU Ri-ping,WANG Wen-kui.Crystallization kinetics of Zr_(47) Cu_(44)Al_9 bulk metallic glass[J].Transactions of Materials and Heat Treatment,2009,30(6). | |
| Authors: | ZHANG Bao-qing CAO Guo-hua ZHAN Zai-ji LIU Ri-ping WANG Wen-kui |
| Abstract: | Zr_(47) Cu_(44)Al_9 bulk metallic glass was prepared by copper mold casting. The crystallization behavior of the bulk metallic glass was investigated by using differential scanning calorimetry ( DSC ). The results show that the character temperatures, including glass transition temperature T_g, crystallization temperature T_x and crystallization peak temperature T_p, all move to high temperature zone with increasing of heating rate. The activation energy of glass transition, crystallization and peak crystallization are 390.2kJ/mol, 325. 1kJ/mol and 299.5kJ/mol,respectively. The erystallization activation energy decreases with increase of the crystallizaed volume fraction. The results show that Zr_(47) Cu_(44)Al_9 bulk metallic glass has good thermal stability. |
| Keywords: | bulk metallic glass non-isothermal annealing crystallization kinetics activation energy |
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