Hydrogen and its effect on Ti-Ni powder grinding

The effect of hydrogen on Ti-Ni powder grinding has been studied. It is shown that the average size of the powder particles measured by SEM decreases from 11.1 to 6.7 µm during mechanical treatment with pre-hydrogenation for 180 min. It was revealed that after mechanical treatment, the lattice param...

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Main Authors: Abdulmenova, E. V., Kulkov, S. N.
Format: Conference Proceeding
Language:English
Subjects:
Austenite
Dislocation density
Grinding
Hydrogenation
Intermetallic compounds
Lattice parameters
Nickel base alloys
Nickel compounds
Structural analysis
Temperature
Titanium compounds
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Kulkov, S. N.
description The effect of hydrogen on Ti-Ni powder grinding has been studied. It is shown that the average size of the powder particles measured by SEM decreases from 11.1 to 6.7 µm during mechanical treatment with pre-hydrogenation for 180 min. It was revealed that after mechanical treatment, the lattice parameters of the TiNi (austenite), Ti2Ni and Ni3Ti phases do not change. The lattice parameter of only the Ti2Ni phase changes significantly after mechanical treatment of the pre-hydrogenated powder. In particular, the lattice parameter increases to 1.1457 ± 5 × 10−4 nm after 180 minutes of hydrogenation and corresponds to the lattice parameter of Ti2NiH0.5 hydride. The CDD size of the TiNi phase does not change and equals 25 ± 5 nm. The Ti2Ni phase exhibits the highest dislocation density estimated from the data of X-ray structural analysis compared with the TiNi (austenite) and Ni3Ti phases. Thus, pre-hydrogenation can be effective for obtaining fine powders in a high-intensity mill by suppressing aggregation of fine particles.
doi_str_mv 10.1063/5.0084922
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V. ; Kulkov, S. N.</creator><contributor>Fomin, Vasily M. ; Kolubaev, Evgeny A.</contributor><creatorcontrib>Abdulmenova, E. V. ; Kulkov, S. N. ; Fomin, Vasily M. ; Kolubaev, Evgeny A.</creatorcontrib><description>The effect of hydrogen on Ti-Ni powder grinding has been studied. It is shown that the average size of the powder particles measured by SEM decreases from 11.1 to 6.7 µm during mechanical treatment with pre-hydrogenation for 180 min. It was revealed that after mechanical treatment, the lattice parameters of the TiNi (austenite), Ti2Ni and Ni3Ti phases do not change. The lattice parameter of only the Ti2Ni phase changes significantly after mechanical treatment of the pre-hydrogenated powder. In particular, the lattice parameter increases to 1.1457 ± 5 × 10−4 nm after 180 minutes of hydrogenation and corresponds to the lattice parameter of Ti2NiH0.5 hydride. The CDD size of the TiNi phase does not change and equals 25 ± 5 nm. 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It was revealed that after mechanical treatment, the lattice parameters of the TiNi (austenite), Ti2Ni and Ni3Ti phases do not change. The lattice parameter of only the Ti2Ni phase changes significantly after mechanical treatment of the pre-hydrogenated powder. In particular, the lattice parameter increases to 1.1457 ± 5 × 10−4 nm after 180 minutes of hydrogenation and corresponds to the lattice parameter of Ti2NiH0.5 hydride. The CDD size of the TiNi phase does not change and equals 25 ± 5 nm. The Ti2Ni phase exhibits the highest dislocation density estimated from the data of X-ray structural analysis compared with the TiNi (austenite) and Ni3Ti phases. 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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects Austenite
Dislocation density
Grinding
Hydrogenation
Intermetallic compounds
Lattice parameters
Nickel base alloys
Nickel compounds
Structural analysis
Temperature
Titanium compounds
title Hydrogen and its effect on Ti-Ni powder grinding
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