Nanocrystallisation and mechanical properties of the amorphous Ni-Zr-Ti-Al-Cu-Si ribbons

被引：3
|
作者：
Czeppe, T [1 ]
Vassileva, E [1 ]
Dutkiewicz, J [1 ]
机构：
[1] Polish Acad Sci, Inst Met & Mat Sci, PL-30059 Krakow, Poland
来源：
BULK AND GRADED NANOMETALS | 2005年 / 101-102卷
关键词：
Ni-based amorphous alloy; melt spun ribbons; glass crystallization; microhardness;
D O I：
10.4028/www.scientific.net/SSP.101-102.241
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Structure, thermal stability and microhardness of the melt-spun ribbons of the composition Ni56Zr18Ti16Si5Al3CU2 were investigated. Completely amorphous or partially crystalline structure of the ribbons was observed in dependence on the cooling rate. The values of T-g, T-x1, DeltaT(x), and T-m were found to be 553, 601, 48 and 994degreesC, respectively. The value of GFA was calculated to be 0.65. The NiTi(Zr) cubic phase in the amorphous matrix crystallized isothermally at temperature near 600degreesT. The activation energy for the primary crystallization and the retardation of the onset of isothermal crystallization were determined. The microhardness test performed on the annealed amorphous ribbons exhibited increase of the hardness in comparison with the amorphous and polycrystalline material after isothermal crystallization.
引用
收藏
页码：241 / 246
页数：6
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