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Calciothermic Synthesis of Very Fine, Hydrogenated Ti and Ti–Nb Powder for Biomedical Applications
Author(s) -
Lindemann Inge,
Gebel Bernhard,
Pilz Stefan,
Uhlemann Margitta,
Gebert Annett
Publication year - 2020
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201901210
Subject(s) - materials science , titanium , biocompatibility , niobium , titanium hydride , alloy , metallurgy , chemical engineering , titanium powder , nanotechnology , engineering
Due to their excellent biocompatibility, titanium and titanium–niobium alloys are especially interesting for biomedical applications. With regard to favorable near‐net shape production, Ti powder synthesis is the key hurdle. Extensive research has been in progress for alternative synthesis methods since decades. Herein, an efficient alternative method to the conventional powder production process to prepare spherical powders with very small sizes (<45 μm) for high‐strength materials is shown. Very fine, hydrogenated Ti and Ti–Nb alloy powders are stable in air and are synthesized by calciothermic reduction in hydrogen. The herein presented reduction using CaH 2 starts directly from the oxides instead of chlorides. Correlations of size and morphology of the as‐synthesized TiH 2 and (Ti,Nb)H 2 powders with the precursors (TiO 2 , Nb 2 O 5 , and CaH 2 ) are illustrated and are used to tailor the desired powders.