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Oxidation inhibition behaviors of the HfB2-SiC-TaSi2 coating for carbon structural materials at 1700 ℃
Corrosion Science ( IF 8.3 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.corsci.2020.108982
Menglin Zhang , Xuanru Ren , Hongao Chu , Junshuai Lv , Wei Li , Weiguang Wang , Qingqing Yang , Peizhong Feng

Abstract Oxidation inhibition behaviors of the HfB2-SiC-TaSi2 coatings fabricated by spark plasma sintering method were investigated at 1700 ℃. The inerting protection capability and volume expansion effect of TaSi2 is conducive to inhibiting the active oxidation of SiC and loosening of HfB2 at 1700 ℃, enhancing the structural blocking ability of the coatings. The dispersion of dual transition metal Hf/Ta-oxide nanocrystalline particles were accelerated by the autogenous separation of TaSi2 and exogenous exfoliation of SiO2 glass to form the Hf-Ta-B-Si-O compound glass layer, which conduce to decrease oxygen permeability of the compound glass layers and enhance oxidation protection efficiency of the coatings.

中文翻译:

HfB2-SiC-TaSi2涂层对碳结构材料的1700 ℃氧化抑制行为

摘要 研究了放电等离子烧结法制备的HfB2-SiC-TaSi2涂层在1700 ℃下的氧化抑制行为。TaSi2的惰性保护能力和体积膨胀作用有利于抑制1700℃下SiC的活性氧化和HfB2的松散,增强涂层的结构封闭能力。TaSi2 的自生分离和 SiO2 玻璃的外生剥离加速了双过渡金属 Hf/Ta-氧化物纳米晶颗粒的分散,形成 Hf-Ta-B-Si-O 复合玻璃层,有助于降低氧的渗透性。复合玻璃层,提高涂层的抗氧化效率。
更新日期:2020-12-01
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