An effective way to solve the abnormal oxidation behavior of Fe in Ti(C, N)-304ss cermet. (15th July 2019)

• Record Type: Journal Article
• Authors: He, Lin; Gao, Yimin; Li, Yefei; Liu, Zhiwei; Zhai, Wenyan; Yuan, Wei; Chen, Wenqing; Yan, Wentao
• Is Part Of: Corrosion science. Volume 155(2019)
• Page Start: 164
• Page End: 172
• Publication Date: 2019-07-15
• Subjects: Cermet -- Oxidation -- Composite -- Ti(C, N); Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.04.033
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: The oxidation behavior of the TiB2 /Ti(C, N)-304ss cermet during early oxidation stage was investigated. The abnormal oxidation behavior of Fe in this cermet was relieved with the addition of WC and TiB2 . The mechanism of relieving the abnormal oxidation behavior was revealed. Abstract: WC and TiB2 were added into Ti(C, N)-304ss cermet to relieve an abnormal oxidation behavior of Fe in this cermet. During high-temperature oxidation (650 °C), the volume swelling of WO3 eliminated the gap led by the volume shrinkage of TiO2 . Liquid B2 O3 covered the oxidation surface or filled in cracks, forming a dense oxidation layer. As a result, the abnormal oxidation behavior was relieved. The oxidation mechanism was investigated using FESEM, XRD, LSCM, and AFM. Fe atoms outward diffused to the surface along with the TiO2 /304ss boundary forming ring-structure oxide and across the TiO2 generating aggregated oxide on TiO2 surface.