Affiliation:
1. The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan China
2. Department of Electrical Engineering The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong China
3. Jinan Ludong Refractories Co., Ltd. Jinan China
Abstract
AbstractCaAl12O19–CaTiO3 (CA6–CT) materials are fabricated using a solid sintering method to investigate the effects of TiO2 content on the phase composition, properties, and microstructure of the materials. With increasing TiO2 content, the preferential replacement of Al3+ by Ti4+ in the CA6 crystal increases the concentration of vacancy defects, thereby promoting ion diffusion and mass transfer, which improves the sintering reaction activity. However, as more TiO2 is added, the CaTiO3 phase formed increases the thermal conductivity and mean expansion coefficient of the material at high temperatures, which degrades its thermal shock stability. The CA6–CT refractory showed good corrosion resistance to the Ti6Al4V melt. Except for a slight penetration of iron element, no obvious corrosion occurred at the reaction interface.
Funder
National Natural Science Foundation of China
Subject
Materials Chemistry,Ceramics and Composites
Cited by
1 articles.
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