Nanocrystallisation and Mechanical Properties of the Amorphous Ni-Zr-Ti-Al-Cu-Si Ribbons
Nanocrystallisation and Mechanical Properties of the Amorphous Ni-Zr-Ti-Al-Cu-Si Ribbons
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非晶Ni-Zr-Ti-Al-Cu-Si带材的纳米晶化及力学性能
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Dutkiewicz
中科院分区：
文献类型：
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作者：
T. Czeppe;E. Vassileva;J. Dutkiewicz
研究了成分为Ni56Zr18Ti16Si5Al3Cu2的快淬薄带的组织、热稳定性和显微硬度。完全非晶或部分结晶结构的带状物中观察到的依赖于冷却速率。测得Tg、Tx1、Δ Tx和Tm分别为553、601、48和994°C。GFA的值计算为0.65。非晶基体中的NiTi（Zr）立方相在600°C附近等温结晶。测定了初晶活化能和等温结晶开始延迟时间。对退火后的非晶薄带进行的显微硬度测试表明，与等温晶化后的非晶和多晶材料相比，硬度有所增加。
Structure, thermal stability and microhardness of the melt-spun ribbons of the composition Ni 5 6 Zr 1 8 Ti 1 6 Si 5 Al 3 Cu 2 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 x 1 , ΔT x and T m were found to be 553, 601, 48 and 994°C, 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 600°C. 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.