Effects of annealing temperature on dealloying of Ti–Cu Alloy. (February 2015)

• Record Type: Journal Article
• Authors: Li, Jie; Yu, Nana; Jiang, Huawei; Leng, Jinfeng; Geng, Haoran
• Is Part Of: Corrosion science. Volume 91(2015)
• Page Start: 95
• Page End: 100
• Publication Date: 2015-02
• Subjects: A. Titanium -- B. SEM -- B. XRD -- C. De-alloying -- C. Acid corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2014.11.002
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Annealing temperature has a big influence on microstructure of Ti33 Cu67 ribbons. Sea-urchin-like TiO2 is fabricated by dealloying 500 °C (or above) annealed ribbons. TiO2 obtained from 500 °C annealed ribbons shows a good mechanical integrity. Abstract: A combined annealing–dealloying method is applied to process Ti33 Cu67 alloy ribbons. This paper discusses the formation mechanism of nanostructured TiO2 . With the increase of annealing temperature, phase segregation occurs and intermetallics of TiCu3 and Ti3 Cu4 emerge. Multilayer TiO2 and sea-urchin-like rutile TiO2 were obtained by dealloying amorphous and crystalline ribbons in 65 wt.% HNO3 solutions, respectively. The original shape of the ribbon can be maintained by the as-dealloyed 550 °C (and 600 °C) annealed ribbons and they possess good mechanical integrity. In addition, sea-urchin-like TiO2 can slightly improve the photocatalytic performance of the degradation of methyl orange.