Gómez-Rodríguez Cristian, Antonio-Zárate Yanet, Revuelta-Acosta Josept, Verdeja Luis Felipe, Fernández-González Daniel, López-Perales Jesús Fernando, Rodríguez-Castellanos Edén Amaral, García-Quiñonez Linda Viviana, Castillo-Rodríguez Guadalupe Alan
Faculty of Engineering, University of Veracruz (Coatzacoalcos), Av. Universidad km 7.5 Col. Santa Isabel, Coatzacoalcos 96535, Mexico.
Department of Materials Science and Metallurgical Engineering, University of Oviedo, 33003 Oviedo/Uviéu, Spain.
Materials (Basel). 2021 Apr 28;14(9):2277. doi: 10.3390/ma14092277.
This study investigates the corrosion mechanism on 100 wt.% MgO and 95 wt.% MgO with 5 wt.% nano-ZrO ceramic composites. First, MgO powder and powder mixtures (MgO + nano ZrO) were uniaxially and isostatically pressed; then, they were sintered at 1650 °C. Corrosion by copper slag was studied in sintered samples. Physical properties, microstructure, and penetration of the slag in the refractory were studied. Results reveal that ZrO nanoparticles enhanced the samples' densification, promoting grain growth due to diffusion of vacancies during the sintering process. Additionally, magnesia bricks were severely corroded, if compared with those doped with nano-ZrO, mainly due to the dissolution of MgO grains during the chemical attack by copper slag.
本研究调查了100 wt.%氧化镁以及含5 wt.%纳米氧化锆的95 wt.%氧化镁陶瓷复合材料的腐蚀机制。首先，将氧化镁粉末和粉末混合物（氧化镁+纳米氧化锆）进行单轴和等静压压制；然后，在1650℃下烧结。研究了烧结样品在铜渣作用下的腐蚀情况。对耐火材料的物理性能、微观结构以及炉渣的渗透情况进行了研究。结果表明，纳米氧化锆颗粒提高了样品的致密化程度，在烧结过程中由于空位扩散促进了晶粒生长。此外，与掺杂纳米氧化锆的氧化镁砖相比，氧化镁砖受到了严重腐蚀，这主要是由于在铜渣的化学侵蚀过程中氧化镁晶粒的溶解。
