Destructive hydrogenation and recombination of [[alpha].sub.2]-[Ti.sub.3]Al alloy: production of solid nanocomposites and coatings with improved properties. II. Recombination of [Ti.sub.3]Al and production of detonation-sprayed coatings

The recombination of [Ti.sub.3]Al from products of destructive hydrogenation ([alpha]-Ti[H.sub.x], [beta]-Ti[H.sub.y], Ti[H.sub.1.9](c), Ti[H.sub.2](t), Ti[Al.sub.2], and Ti[Al.sub.3]) is studied. It is established that recombined [Ti.sub.3]Al is an ordered alloy with domain structure. The cross-sec...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2011-01, Vol.49 (9-10), p.598
Main Authors: Bratanich, T.I, Skorokhod, V.V, Kopilova, L.I, Kotko, A.V, Oliker, V. Yu, Gorban, V.F
Format: Article
Language:English
Subjects:
Alloys
Coatings
Coatings industry
Hardness
Hydrogenation
Mechanical properties
Nanotechnology
Powders
Specialty metals industry
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Summary:The recombination of [Ti.sub.3]Al from products of destructive hydrogenation ([alpha]-Ti[H.sub.x], [beta]-Ti[H.sub.y], Ti[H.sub.1.9](c), Ti[H.sub.2](t), Ti[Al.sub.2], and Ti[Al.sub.3]) is studied. It is established that recombined [Ti.sub.3]Al is an ordered alloy with domain structure. The cross-sectional size of domains varies from 70 to 200 nm. The hardness of recombined [Ti.sub.3]Al is 40% higher than that of starting [Ti.sub.3]Al. The materials subjected to destructive hydrogenation and recombination are used for detonation spraying of coatings. The coatings have a small amount of brittle phases and narrow or absent boundaries between individual layers and between the coating and the substrate. The coatings made of hydrogenated powders have twice as strong bonding with the substrate as the coatings made of [Ti.sub.3]Al powder produced by mechanical grinding of ingots. Keywords: [[alpha].sub.2]-[Ti.sub.3]Al, recombination, detonation-sprayed coating.
ISSN:1068-1302