Oxidation mechanism of in-situ TiC/Ni composites at 1073 K
Source abstract
Abstract
Abstract The oxidation behavior at 1073 K of in-situ TiC/Ni composites prepared by reactive sintering obey parabolic kinetics. The oxidation activation energy is 210 ± 30 kJ•mol−1, closed to that of O diffusion through rutile. Oxide scale formed on composites includes two layers: continuous outer layer consisted by upper TiO2 +NiTiO3 +NiO and nether TiO2, and inner layer composed of TiO2 islands dispersed in Ni matrix. The oxidation process is determined by outward diffusion of Ti and Ni and inward diffusion of O, and the later one plays a predominant role, leading to the faster growth rate of inner layer than outer layer.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced materials and composites · Advanced ceramic materials synthesis · Advancements in Solid Oxide Fuel Cells
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