Preparation and characterization of novel TiB2-12(Fe-Co-Cr-Ni) cermets and their corrosion resistance in molten aluminum

Preparation and characterization of novel TiB2-12(Fe-Co-Cr-Ni) cermets and their corrosion resistance in molten aluminum
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新型TiB2-12(Fe-Co-Cr-Ni)金属陶瓷的制备、表征及其在铝液中的耐蚀性能

DOI:
10.1016/j.corsci.2021.109643
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发表时间:
2021-09
期刊:
影响因子:
8.3
通讯作者:
Jian Chen
Jian Chen
中科院分区:
材料科学1区
文献类型:
--
作者:
Yi Yang;Bingbing Yin;Yansong Shang;Xinming Wang;Jian Chen

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采用放电等离子烧结技术在1400℃、1500℃和1600℃制备了9种新型TiB2-12(Fe-Co-Cr-Ni)金属陶瓷,研究了它们在700℃铝熔体中的腐蚀行为,发现它们的腐蚀动力学与浸泡时间呈线性关系。腐蚀速率的比较表明,减小TiB2粉末的尺寸,增加Fe-Co-Cr-Ni固溶体的比例,控制金属陶瓷的孔隙率和二次硼化物的析出,可以提高它们的耐腐蚀性能。探讨了TiB2-12(Fe-Co-Cr-Ni)金属陶瓷在铝熔体中的腐蚀机理。
Nine novel TiB2-12(Fe-Co-Cr-Ni) cermets were prepared using spark plasma sintering at 1400 °C, 1500 °C, and 1600 °C, and their corrosion behaviors were investigated in molten aluminum at 700 °C. The corrosion kinetics of these cermets exhibited a linear relation with the immersion time. A comparison of their corrosion rates suggested that their corrosion resistance could be improved by lowering the size of TiB2powder, increasing the proportion of Fe-Co-Cr-Ni solid solution, and controlling the porosity of the cermet and the precipitation of secondary borides. The corrosion mechanism of the TiB2-12(Fe-Co-Cr-Ni) cermet in molten aluminum was also discussed.
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