Synthesis of spherical nanocrystalline titanium hydride powder via calciothermic low temperature reduction. (15th March 2017)

• Record Type: Journal Article
• Authors: Lindemann, Inge; Herrich, Monika; Gebel, Bernhard; Schmidt, Romy; Stoeck, Ulrich; Uhlemann, Margitta; Gebert, Annett
• Is Part Of: Scripta materialia. Number 130(2017)
• Page Start: 256
• Page End: 259
• Publication Date: 2017-03-15
• Subjects: Titanium -- Hydrogen -- Mechanical milling -- Nanocrystalline materials -- X-ray diffraction; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.11.018
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Spherical nanocrystalline TiH2 powder was synthesized by calciothermic reduction of TiO2 with CaH2 at low temperature. Reduction was performed in solid state either by reactive milling in H2 or via pre-milling in Ar with subsequent heat treatment in H2 . Reactively milled powders are pyrophoric on exposure to air. Leaching of the side product CaO was only successful from the pre-milled and heat treated powders. As synthesized TiH2 is stable in air and desorbs H2 below 600 °C forming nanocrystalline Ti. Therefore it is suitable to prepare ultra finegrained cp-Ti. Graphical abstract: