Zr-Ti-Cu-Ni-Be大块非晶合金等温晶化过程相分离研究

稀有金属材料与工程, 2004, 33(12): 1257-1260.

Zr-Ti-Cu-Ni-Be大块非晶合金等温晶化过程相分离研究

沈军 ^1, , 高玉来 ^2, , 孙剑飞 ^3, , 陈德民 ^4, , 王刚 ^5, , 邢大伟 ^6, , 周彼德 ^7,

1.哈尔滨工业大学,黑龙江,哈尔滨,150001

2.哈尔滨工业大学,黑龙江,哈尔滨,150001

3.哈尔滨工业大学,黑龙江,哈尔滨,150001

4.哈尔滨工程大学,黑龙江,哈尔滨,150001

5.哈尔滨工业大学,黑龙江,哈尔滨,150001

6.哈尔滨工业大学,黑龙江,哈尔滨,150001

7.哈尔滨工业大学,黑龙江,哈尔滨,150001

关键词： Zr-Ti-Cu-Ni-Be合金 , 大块非晶合金 , 过冷液体 , 等温晶化 , 相分离

Phase Separation of Zr-Ti-Cu-Ni-Be Bulk Amorphous Alloy during Isothermal Annealing

利用差示扫描量热法(DSC)和透射电镜(TEM)对Zr41.2Ti13.8Cu12.5Ni10Be22.5(at%)大块非晶合金的等温晶化过程和析出相进行了研究.结果表明,大块非晶合金在等温晶化过程中表现出多阶段相析出行为,并且在不同的晶化阶段,析出相也有所不同.在第1个晶化阶段,析出相主要是体心四方(b.c.t)结构的Zr2Cu相;而在晶化的第2个阶段,晶化相主要为简单六方结构的ZrBe2相.从一定程度上证实了Zr41.2Ti13.8Cu12.5Ni10Be22.5大块非晶合金在发生晶化时会形成富Zr区和富Be区,即有相分离的趋势.XRD测试的结果也证实了非晶合金在发生完全晶化时,主要的晶化产物为Zr2Cu和ZrBe2相.

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