Structure, morphology and hydrogen desorption characteristics of amorphous and crystalline Ti–Ni alloys

✍ Scribed by Xiangyu Zhao; Liqun Ma; Yanan Gou; Xiaodong Shen

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 759 KB
• Volume: 516
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2009.04.015

✦ Synopsis

Mechanical alloying and heat treatment have been used to prepare amorphous and crystalline Ti-50 at % Ni alloys. Changes of the structure, morphology and hydrogen desorption characteristics of Ti-Ni alloys were investigated. The results of X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscope (SEM) show that amorphous Ti-Ni phase with uniform elemental distribution forms after 100 h of milling. A crystalline Ti-Ni alloy, consisted of Ti 2 Ni phase coexisting with minor phases TiNi and TiNi 3 , was formed by annealing this as-milled alloy. The amorphous Ti-Ni alloy presented good corrosion resistance, cyclic stabilization and anti-pulverization, while the crystalline one showed poor kinetic properties and severe pulverization during charge and discharge cycles.