Devitrification of Ni-based glassy alloys containing noble metals in relation with the supercooled liquid region
Devitrification of Ni-based glassy alloys containing noble metals in relation with the supercooled liquid region
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DOI：
10.1016/j.jnoncrysol.2004.03.124
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发表时间：
2004-07
影响因子：
3.5
通讯作者：
D. Louzguine;A. Inoue
中科院分区：
文献类型：
--
作者：
D. Louzguine;A. Inoue
采用X射线衍射、透射电镜、差示扫描量热法和等温量热法研究了Ni基非晶合金过冷液相区的形成和失透行为。oC68 Ni10Zr7型相主要在失透过程的初始阶段通过形核和三维扩散控制生长在所研究的合金中形成。Ni置换Cu 55Zr 30Ti 10Pd 5合金中的Cu，直接从玻璃相中析出oC68Ni 10Zr 7相。考虑到混合焓在液态和过冷液体区域的间隔，这种行为的原因进行了讨论。
The formation of the supercooled liquid region and devitrification behavior of Ni-based glassy alloys were studied by using X-ray diffraction, transmission electron microscopy, differential scanning calorimetry and isothermal calorimetry. oC68 Ni10Zr7-type phase is primarily formed in the studied alloys in the initial stage of the devitrification process by nucleation and three-dimensional diffusion controlled growth. The replacement of Cu by Ni in Cu55Zr30Ti10Pd5glassy alloy induces precipitation of oC68 Ni10Zr7phase directly from the glassy phase. The reasons for such a behavior are discussed taking into account mixing enthalpy in a liquid state and the interval of the supercooled liquid region.