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


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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 1100–1550°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 1200°C have been shown to have a nonuniform microstructure. According to electron microscopy results, the alloys consist of grains of the α2 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 1300°C have a uniform lamellar structure.

作者简介

B. Karakozov

Institute of Atomic Energy

Email: sherzod05_88@mail.ru
哈萨克斯坦, Krasnoarmeiskaya ul. 10, Kurchatov, 071100

M. Skakov

Institute of Atomic Energy

Email: sherzod05_88@mail.ru
哈萨克斯坦, Krasnoarmeiskaya ul. 10, Kurchatov, 071100

Sh. Kurbanbekov

Institute of Atomic Energy

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Email: sherzod05_88@mail.ru
哈萨克斯坦, Krasnoarmeiskaya ul. 10, Kurchatov, 071100

V. Baklanov

Institute of Atomic Energy

Email: sherzod05_88@mail.ru
哈萨克斯坦, Krasnoarmeiskaya ul. 10, Kurchatov, 071100

A. Sitnikov

Polzunov State Technical University

Email: sherzod05_88@mail.ru
俄罗斯联邦, pr. Lenina 46, Barnaul, 656038

D. Dudina

Lavrentyev Institute of Hydrodynamics, Siberian Branch; Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch; Novosibirsk State Technical University

Email: sherzod05_88@mail.ru
俄罗斯联邦, pr. Akademika Lavrent’eva 15, Novosibirsk, 630090; ul. Kutateladze 18, Novosibirsk, 630128; pr. Marksa 20, Novosibirsk, 630073

V. Maly

Lavrentyev Institute of Hydrodynamics, Siberian Branch

Email: sherzod05_88@mail.ru
俄罗斯联邦, pr. Akademika Lavrent’eva 15, Novosibirsk, 630090

V. Yakovlev

Polzunov State Technical University

Email: sherzod05_88@mail.ru
俄罗斯联邦, pr. Lenina 46, Barnaul, 656038

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