Article
Materials Science, Ceramics
Xing Wang, Yang Chen, Jun Ding, Chao Yu, Chengji Deng, Hongxi Zhu
Summary: Increasing nitriding temperature and adding catalyst can promote the formation of ceramic phases in MgO-C refractories, while excessive ceramic phases lead to sample expansion and increased porosity, reducing the physical properties of the materials.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Somnath Sinhamahapatra, Chandrima Ghosh, Himansu Sekhar Tripathi, Sunanda Mukhopadhyay
Summary: The magnesium aluminate spinel was prepared from constituent oxides through a solid-state sintering process at temperatures ranging from 1550 to 1700 degrees C in a normal air atmosphere. The addition of TiO2 and Yb2O3 improved the densification and mechanical properties of the magnesia-rich spinel, with Yb2O3 showing better performance in room temperature flexural strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Junjie Yan, Wen Yan, Stefan Schaffoner, Yajie Dai, Zhe Chen, Qiang Wang, Guangqiang Li, Cangjian Jia
Summary: This study found that the apparent porosity of aggregates had a significant impact on the properties of lightweight castables. Aggregates with an apparent porosity of 30.8% exhibited the best strength and performance combination. The presence of cracks and microcracks had a significant effect on the performance of the castables.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yang Chen, Chengji Deng, Xing Wang, Chao Yu, Jun Ding, Hongxi Zhu
Summary: Nanoscale c-ZrN powders were synthesized by molten-salt nitridation at 1100 degrees C and introduced into low-carbon MgO-C refractories to address the high cost of ZrN. The addition of ZrN significantly promoted the reaction and enhanced the mechanical properties of the refractories by promoting the formation of more ceramic phases, especially flake-like Mg2SiO4. The mechanism of ZrN in the MgO-C refractories was clarified through this study.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Jaewoo Myung, Yongsug Chung
Summary: The degradation behavior of MgO-15 pctC by Ar blowing in contact with liquid steel was studied. It was found that degradation occurred at temperatures higher than 1600 degrees C, resulting in surface and internal degradation of the MgO-C. The degradation mechanism is believed to be a chain reaction involving direct and indirect reactions.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Ceramics
Zhuo Zhang, Xiaoming Duan, Ze Zhang, Weiming Guo, Huatay Lin, Delong Cai, Peigang He, Dechang Jia, Yu Zhou
Summary: The preparation of β-Si3N4 ceramics involves the use of alpha-Si3N4 powders, beta-Si3N4 whiskers, and Re2O3-MgO additives. The transition from alpha-Si3N4 to beta-Si3N4 during sintering, along with the distribution of oxide particles, significantly influences the mechanical properties of the ceramics. The thermal conductivity of the ceramics is determined by both the grain size and the homogeneity of oxide particle distribution, leading to a lack of a regular trend among different specimens.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Sebastian E. Gass, Pablo G. Galliano, Analia G. Tomba Martinez
Summary: This study investigates the thermal behavior and mechanical properties of MgO-C bricks with added aluminum at 600 degrees Celsius. The presence of aluminum has been found to impact the mechanical behavior of the samples by consolidating the C-C network to counterbalance material degradation caused by microcracking.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Sebastian E. Gass, Pablo G. Galliano, Analia G. Tomba Martinez
Summary: This study analyzed the mechanical behavior of MgO-C refractories at an intermediate temperature of 1000°C, simulating conditions similar to those occurring during the pre-heating of steelmaking ladles. The presence of Al was found to be deleterious at longer soaking times at 1000°C, while the closure of previously formed microcracks was considered to be mainly responsible for the mechanical behavior of the refractories when heated simultaneously with a low compressive load.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Yamila S. Lagorio, Sebastian E. Gass, Edgardo R. Benavidez, Analia G. Tomba Martinez
Summary: This study evaluates the thermomechanical properties of three different MgO-C bricks and proposes an alternative thermal shock test. The results indicate that bricks with higher amounts of aluminum and graphite, bonded with resin, exhibit better response to thermal shock.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Qilong Chen, Yawei Li, Tianbin Zhu, Yibiao Xu, Yuanjin Li, Xuyuan Wang
Summary: The use of calcium magnesium aluminate (CMA) aggregates in MgO-C refractories was found to improve thermal shock resistance, bearing capacity, and reduce cracking caused by thermal shocks. MgO-C refractories containing CMA showed higher recovery strength after thermal shocks and lower brittleness, indicating their potential as a promising material in steelmaking applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xiaochuan Chong, Kaidi Li, Guoqing Xiao, Donghai Ding, Xing Hou
Summary: To produce high-performance low carbon MgO-C refractories, combustion synthesized MgO nanofibers containing C/MgO composite powders (SCM) were introduced. The inclusion of 6 wt% SCM in the refractories resulted in the best comprehensive properties, with significant enhancements in thermal shock resistance, oxidation resistance, and slag resistance. The unique microstructure of MgO nanofibers and carbon encapsulated MgO played a crucial role in improving the thermal shock resistance of the refractories.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Zhaoyang Liu, Jingkun Yu, Xiangnan Wang, Pengcheng Ma, Wenbiao Gu, Jun Wen, Shan Wei, Xiaofang Zhang, Zhengguo Yan, Tianpeng Wen, Lei Yuan, Beiyue Ma
Summary: This study investigates the effects of boron-containing additives on the properties of low-carbon MgO-C refractories. The results show that these additives can enhance the oxidation resistance and mechanical properties of the refractories at high temperatures, and also improve their resistance against slag corrosion.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Chenxiong Gao, Xiangxun Zhao, Bo Li
Summary: The addition of Y2O3 in MAS glass-ceramics enhances crystallinity and promotes the formation of Indialite, leading to adjustments in thermal expansion coefficient. Proper amounts of Y2O3 improve densification and crystal phase precipitation during the sintering process, resulting in significantly enhanced mechanical properties.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Yage Li, Junkai Wang, Hongjuan Duan, Lei Han, Quanli Jia, Xueyin Liu, Shaowei Zhang, Haijun Zhang
Summary: The effects of Co, Fe and Ni catalysts on the formation of CNTs from pyrolysis of phenolic resin were investigated. Co and Fe performed the best, with Co requiring the lowest energy for forming the carbon rings and Fe having the highest melting point. The addition of 0.25 wt% Fe catalyst significantly improved the hot modulus of rupture of the CNT reinforced refractory sample.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
Muharrem Pul, Umit Erdem, Mustafa Burak Turkoz, Gurcan Yildirim
Summary: This experimental study produced Al7075 matrix composites reinforced with different proportions of MgO using the powder metallurgy method. Different sintering temperatures and times were applied, and the resulting composite materials were evaluated for their porosity, hardness, microstructure, and structural properties. It was found that the sintering temperature of 550 degrees C yielded the most suitable results and the sintering time strengthened the phase volume of the alloy, making the compound more stable.
JOURNAL OF MATERIALS SCIENCE
(2023)
