In-situ formation mechanism and long-term isothermal oxidation behaviors at 1400 °C and 1500 °C of (Nb,Ti,Mo)Si2-(Ti,Nb,Mo)5Si3 biphasic compositionally-complex ceramic composite coating on C103 alloy
Xin Wang , Wei Zhang , Tingyang Wang , Tao Yang , Chengxu Han , Fan Yang
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Abstract
A novel (Nb,Ti,Mo)Si2-(Ti,Nb,Mo)5Si3 biphasic composite coating was in-situ prepared on C103 alloy via vacuum reactive sintering. The coating kept intact after oxidation at 1400℃ and 1500℃ for 100 h, respectively, and its oxidation behaviors were governed by the selective oxidation process of elements within the silicides. The coating formed a composite oxide film featuring amorphous SiO2 as the “cement” and spherical TiO2 particles as the “aggregate particles”. After oxidation at 1500℃ for 100 h, the surface phase of the coating transformed into (Nb,Mo)Si2. Coating degradation initiated at the grain boundaries of NbSi2 in the lower part of the coating.
期刊介绍：
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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