Conferences

Destructive Hydrogenation and Recombination of α2-Ti3Al Alloy: Production of Monolith Nanocomposites and Coatings with Improved Properties.
II. Recombination of Ti3Al and Production of Detonation Coatings

T.Bratanich,
 
T.Bratanich,
 
V.Skorokhod,
   
V.Oliker,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #09/10
http://www.materials.kiev.ua/article/1674

Abstract

The recombination of Ti3Al from the products of its destructive hydrogenation (α-TiHx, β-TiHy, TiH1.9(c), TiH2(t), TiAl2, and TiAl3) is investigated. It is established that recombined Ti3Al is an ordered alloy with domain structure. The cross-section of domains varies from 70 to 200 nm. The hardness of recombined Ti3Al is 40% higher than that of starting Ti3Al. The materials processed by destructive hydrogenation and recombination are used for detonation spraying of coatings. The coatings show low content of brittle phases and narrow or no boundaries between individual layers and between the coating and the substrate. The coatings from powders treated in hydrogen have twice as strong bonding with the substrate as the coatings from Ti3Al powder produced by mechanical disintegration of ingots.


α2-TI3AL, DETONATION-SPRAYED COATING, RECOMBINATION