Combustion synthesis in the Ni-Al-Nb ternary system: A Time-Resolved X-ray Diffraction study

被引：6

作者：

Sytschev, Alexander E. ^{[1
]}

Kovalev, Dmitry Yu. ^{[1
]}

Vrel, Dominique ^{[2
]}

Vadchenko, Sergey G. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Struct Macrokinet & Mat Sci, Chernogolovka 142432, Moscow, Russia

[2] Univ Paris 13, Sorbonne Paris Cite, LSPM, CNRS UPR3407, 99 Av JB Clement, F-93430 Villetaneuse, France

来源：

RESULTS IN PHYSICS | 2017年 / 7卷

关键词：

COMPOSITES; COMPOUND; ALUMINUM; NIOBIUM; NICKEL;

D O I：

10.1016/j.rinp.2017.05.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Combustion synthesis of intermetallics, using the thermal explosion mode, in the Ni-Al-Nb ternary system is presented, with a 40: 40: 20 atomic ratio. The kinetic pathway is determined using Time-Resolved X-ray Diffraction, with a time-step resolution of 1 s and demonstrated a first formation of the B2 NiAl structure followed by progressive dissolution of Nb to yield NiAlNb intermetallic Laves phase, representing 35 w% of the final product. SEM observations show a double dendritic (coarse and fine) microstructure, resulting from eutectic crystallization. Due to a high cooling rate, Nb dissolution is not complete at the surface, and yields slightly more complex microstructure, including the Ni2AlNb Geissler phase, the (Ni, Al)(2)Nb Laves phase, and (Ni, Al)(7)Nb-6. (C) 2017 The Authors. Published by Elsevier B. V. This is an open access article under the CC BY-NC-ND license

引用

页码：1878 / 1882

页数：5

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