Structural and Phase Transformations in Alloys during Spark Plasma Sintering of Ti+23.5 at % Al+21 at % Nb Powder Mixtures

被引：5
|
作者：
Karakozov, B. K. [1 ]
Skakov, M. K. [1 ]
Kurbanbekov, Sh. R. [1 ]
Baklanov, V. V. [1 ]
Sitnikov, A. A. [2 ]
Dudina, D. V. [3 ,4 ,5 ]
Maly, V. I. [3 ]
Yakovlev, V. I. [2 ]
机构：
[1] Natl Nucl Ctr Republ Kazakhstan, Inst Atom Energy, Krasnoarmeiskaya Ul 10, Kurchatov 071100, Kazakhstan
[2] Polzunov State Tech Univ, Pr Lenina 46, Barnaul 656038, Russia
[3] Russian Acad Sci, Lavrentyev Inst Hydrodynam, Siberian Branch, Pr Akad Lavrenteva 15, Novosibirsk 630090, Russia
[4] Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Ul Kutateladze 18, Novosibirsk 630128, Russia
[5] Novosibirsk State Tech Univ, Pr Marksa 20, Novosibirsk 630073, Russia
来源：
INORGANIC MATERIALS | 2018年 / 54卷 / 01期
关键词：
intermetallic compound; titanium aluminide; spark plasma sintering; microstructure; AL-NB; TIAL ALLOYS;
D O I：
10.1134/S0020168518010053
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the effect of sintering temperature on the structural and phase transformations of alloys produced by the spark plasma sintering of Ti + 23.5 at % Al + 21 at % Nb powder mixtures at temperatures in the range 1100-1550A degrees C. The sintered alloys have been characterized by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy (elemental X-ray mapping). The alloys sintered at temperatures of 1100 and 1200A degrees C have been shown to have a nonuniform microstructure. According to electron microscopy results, the alloys consist of grains of the alpha(2) and Nb2Al phases and small precipitates of the O-phase (intermetallic compound Ti2AlNb). In addition, there are particles of unreacted niobium and titanium. The alloys sintered at a temperature of 1300A degrees C have a uniform lamellar structure.
引用
收藏
页码：37 / 41
页数：5
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