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Ti 2 ZrO Phases Formed in the Titanium and Zirconia Interface After Reaction at 1550°C
Author(s) -
Lin KunLin,
Lin ChienCheng
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00218.x
Subject(s) - materials science , orthorhombic crystal system , titanium , transmission electron microscopy , crystallography , lamellar structure , titanium aluminide , cubic zirconia , zirconium , dissolution , crystal structure , analytical chemistry (journal) , metallurgy , chemical engineering , intermetallic , alloy , ceramic , chemistry , nanotechnology , engineering , chromatography
Hot‐pressed 3 mol% Y 2 O 3 partially stabilized ZrO 2 was reacted with titanium at 1550°C/30 min. The interface was characterized by analytical transmission microscopy (transmission electron microscopy/energy‐dispersive spectroscopy). The lamellar and the spherical Ti 2 ZrO as well as the orthorhombic β′‐Ti were found to exist in the titanium side after cooling down to room temperature. The crystal structures of the lamellar and the spherical Ti 2 ZrO were orthorhombic and hexagonal, respectively. On heating, the dissolution of a large amount of zirconium and oxygen into titanium gave rise to the metastably supersaturated disordered α‐Ti(Zr, O) solid solution where two different Ti 2 ZrO phases subsequently precipitated, while the β‐Ti coexisting with α‐Ti at high temperatures was transformed to the orthorhombic β′‐Ti during cooling. The spherical hexagonal Ti 2 ZrO was an ordered structure, with Zr and O occupying substitutional and interstitial sites, respectively. The orientation relations between α‐Ti and the lamellae orthorhombic Ti 2 ZrO were determined to be [0001] α‐Ti //[110] Ti2ZrO and (10 1 0) α‐Ti //(1 1 0) Ti2ZrO ; meanwhile, those between the α‐Ti and the spherical hexagonal Ti 2 ZrO were [0001] α‐Ti //[0001] Ti2rO and (10 1 0) α‐Ti //(10 1 0) Ti2ZrO .