Stimulation of processes of self-propagating high temperature synthesis in system Ti + Al at low temperatures by influence of γ-quanta

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Sobachkin, A.V.^1 ; Loginova, M.V.^1 ; Sitnikov, A.A.^1 ; Yakovlev, V.I.^1 ; Filimonov, V.Yu.^1 ; Gradoboev, A.V.^2

Polzunov Altai State Technical University, Lenina Av., 46, Barnaul

656038, Russia^1

National Research Tomsk Polytechnic University, Lenina Av., 30, Tomsk

634050, Russia^2

关键词: Firing temperature;    Initial parameter;    Low temperatures;    Mechanical activation;    Nanocrystallinity;    Powder composition;    Self propagating high temperature synthesis;    Structural parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/3/032051/pdf
DOI  :  10.1088/1757-899X/327/3/032051

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In the present work, the influence of the irradiation with gamma-quanta60Co upon the structural and phase state of the components of the mechanically activated powder composition of Ti+Al is investigated. The phase composition, structural parameters, and crystallinity are examined by means of X-ray diffractometry. It is found out that the irradiation with gamma-quanta changes the structure of the mechanically activated powder composition. The higher irradiation dose, the higher the structure crystallinity of both components with no change in phase state. At the same time, the parameters of Ti and Al crystal lattices approach to the initial parameters observed before the mechanical activation. The irradiation with gammaquanta leads to decrease of internal stresses in the mechanically activated powder composition while nanocrystallinity of the structure remains unchanged. Using of powder compositions exposed to the irradiation with gamma-quanta for the SH-synthesis helps to increase speed of the reaction, decrease the peak firing temperature and improve homogeneity, as well as the main phase of the produced material is TiAl.